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WO2016000183A1 - 激光器的波长对准方法和装置、onu、olt和pon系统 - Google Patents

激光器的波长对准方法和装置、onu、olt和pon系统 Download PDF

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Publication number
WO2016000183A1
WO2016000183A1 PCT/CN2014/081289 CN2014081289W WO2016000183A1 WO 2016000183 A1 WO2016000183 A1 WO 2016000183A1 CN 2014081289 W CN2014081289 W CN 2014081289W WO 2016000183 A1 WO2016000183 A1 WO 2016000183A1
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WIPO (PCT)
Prior art keywords
optical power
laser
power spectrum
point
indicated
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PCT/CN2014/081289
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English (en)
French (fr)
Inventor
陈健
王衡
徐之光
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201480012297.1A priority Critical patent/CN105409073B/zh
Priority to PCT/CN2014/081289 priority patent/WO2016000183A1/zh
Publication of WO2016000183A1 publication Critical patent/WO2016000183A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00Semiconductor lasers
    • H01S5/06Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00Semiconductor lasers
    • H01S5/10Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
    • H01S5/12Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
    • H01S5/125Distributed Bragg reflector [DBR] lasers

Definitions

  • the present invention relates to communication technologies, and in particular, to a wavelength alignment method and apparatus for a laser, 0NU
  • a tunable laser is a laser that can adjust the wavelength of an outgoing light, such as a distributed Bragg reflective (DBR) laser.
  • the tunable laser can be placed in a Passive Optical Network (PON) system.
  • the Optical Network Unit (0NU) can also be installed in an Optical Line Terminal (0LT).
  • the DBR laser includes a gain region for emitting light waves, and a phase shift region and a DBR region are sequentially disposed in the opposite direction of the light exiting the gain region.
  • MUX multiplexer
  • an injection current (I DBR ) and a phase shift region are injected into the DBR region (I Phas J.
  • a mapping relationship between a laser parameter and an outgoing light wavelength is established, so that when the wavelength of the laser is aligned, the laser parameter corresponding to the desired outgoing light wavelength is determined according to the mapping relationship table.
  • the required wavelength must be predicted, and then the wavelength alignment of the laser can be performed according to the foregoing mapping table.
  • the operation process is cumbersome and requires manual participation.
  • the mapping relationship between the laser parameters and the wavelength of the outgoing light is established. The cost of the watch is higher, thereby increasing the cost of the laser. Summary of the invention
  • Embodiments of the present invention provide a wavelength alignment method and apparatus for a laser, 0NU, 0LT, and PON systems, which avoid using a mapping relationship between laser parameters and outgoing light wavelengths, and determining parameters of the DBR laser to reduce the cost of the DBR laser. .
  • the first aspect provides a method for wavelength alignment of a laser, comprising: adjusting a phase injection current Ip of a laser or a temperature of a gain region in an adjustment range to obtain an optical power spectrum of the laser, the optical power spectrum indicating laser
  • the outgoing light is the optical signal emitted by the laser through a part of the mirror and the wavelength division multiplexer MUX, reaching the second a partial mirror, reflected by the second partial mirror and passing through the MUX to the first partial mirror, to obtain reflected light
  • the emitted light is an optical signal emitted by the laser through the MUX , the obtained transmitted light; determining the optical power spectrum with the best axial symmetry from the obtained optical power spectrum as the target optical power spectrum; determining the target optical power spectrum corresponding to the I phas6 or the temperature of the gain region, and the target At least two of the I DBRs indicated by the peak points in the optical power
  • determining, from the obtained optical power spectrum, an optical power spectrum with optimal axial symmetry as a target optical power spectrum comprising: calculating each optical power spectrum
  • the I DBR indicated by the mode hopping point, / m is the I DBR indicated by the peak point of the optical power spectrum ; the first hopping point is the hop closest to the peak point of the optical power spectrum along the I direction.
  • a second mode hopping point is a mode hopping point that is closest to a peak point of the optical power spectrum along the I direction; in each of the optical power spectra, the optical power spectrum having the smallest symmetry value is used as a symmetry The best target optical power spectrum.
  • the adjusting the phase region of the laser to inject the current I or the gain region Temperature obtaining the optical power spectrum of the laser, comprising: adjusting the temperature of the Ip or the gain region according to a preset length within the adjustment range, and measuring the optical power spectrum; determining the measurement for each measured optical power spectrum Whether the obtained optical power spectrum satisfies the first determining condition, the second determining condition, and the third determining condition; if the measured optical power spectrum satisfies the first determining condition, the second determining condition, and the third determining condition, Determining the measured optical power spectrum as the obtained optical power spectrum; if the measured optical power spectrum does not satisfy the first determination condition, and the obtained optical power spectrum already exists, stopping the measurement;
  • the first determining condition is that the optical power of the reflected light indicated by the peak point of the optical power spectrum is greater than a first threshold, and the first threshold is based on the optical power and reflection
  • the second determining condition is that the absolute value of the optical power difference of the reflected light between the first mode hopping point and the second hopping point is less than a second threshold,
  • the second threshold is a symmetric value of the optical power spectrum according to the optical power of the laser and the isolation of the reflected light on the optical transmission link MUX.
  • the optical power of the reflected light indicated by the mode hopping point is greater than the at least one of the hopping points
  • the optical power of the reflected light indicated by the adjacent neighboring point and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is based on the optical power of the laser and the MUX
  • the isolation is determined.
  • the first possible implementation of the first aspect, the second possible implementation of the first aspect, and the third possible implementation of the first aspect, the fourth possibility in the first aspect In an implementation manner, at least two parameters of the I Ph ⁇ or the gain region corresponding to the determined target optical power spectrum and the I indicated by the peak point in the target optical power spectrum are used as parameters of the adjustment laser After that, the method further includes: transmitting the parameter of the adjustment laser.
  • the sending the parameter of the adjusting laser comprises: sending a physical layer operation management and maintaining a PL0AM message;
  • the reserved Reserve field in the PL0AM message or the Tuning Control Tuning Control field in the PL0AM message carries the parameters of the adjustment laser.
  • a second aspect provides a wavelength aligning device for a laser, comprising: an obtaining module, configured to adjust a phase of a laser to inject a current I or a temperature of a gain region, to obtain an optical power spectrum of the laser, the optical power spectrum indicating a laser
  • the emitted light is the optical signal emitted by the laser, and passes through a part of the mirror and the wavelength division multiplexer MUX to reach the first a two-part mirror, which is reflected by the second partial mirror and reaches the first partial mirror through the MUX, and obtains reflected light; or, the emitted light is an optical signal emitted by the laser,
  • the MUX the obtained transmitted light
  • a determining module configured to determine an optical power spectrum with the best axial symmetry from the obtained optical power spectrum as a target optical power spectrum
  • a parameter module for corresponding to the determined target optical power spectrum The temperature of the I or gain
  • the determining module includes: a calculating unit, configured to calculate a symmetric value of each optical power spectrum + I is an I DBR , / indicated by the third modulus point.
  • the dish is the I DBR indicated by the second mode point, / m is the i DBR indicated by the peak point of the optical power spectrum ;
  • the first mode hop point is the peak of the optical power spectrum along the I, decreasing direction distance Pointing the nearest mode hopping point;
  • the second hopping point is a mode hopping point closest to the peak point of the optical power spectrum along the increasing direction; and determining means for minimizing each of the optical power spectra Symmetrical value of light work
  • the rate spectrum is used as the best target optical power spectrum for symmetry.
  • the obtaining module is specifically configured to adjust according to a preset length within the adjustment range Ip or the temperature of the gain region, measuring the optical power spectrum; determining, for each measured optical power spectrum, whether the measured optical power spectrum satisfies the first determining condition, the second determining condition, and the third determining condition; The measured optical power spectrum satisfies the first determining condition, the second determining condition, and the third determining condition, and the measured optical power spectrum is taken as the obtained optical power spectrum; if the measured optical power If the spectrum does not satisfy the first determining condition, and the obtained optical power spectrum already exists, the measurement is stopped; wherein the first determining condition is that the optical power of the outgoing light indicated by the peak point of the optical power spectrum is greater than the first a threshold, the first threshold is determined according to an optical power of the laser and an optical loss of the outgoing light in the optical transmission link; the second determining condition is between the first mode
  • the I DBR , the third threshold is determined according to the optical power of the laser, the range of the I DBR , the channel bandwidth of the MUX, and the isolation of the MUX.
  • the calculating unit is specifically configured to calculate a symmetric value of each optical power spectrum + I; wherein 1 is a first mode hop point indicated I DBR, / 2 is the second mode hop point indicated I DBR, / m is the optical power spectrum of the peak point marked I DBR; the first mode hopping The point is a mode hopping point that is closest to the peak point of the optical power spectrum along the I direction; the second hopping point is a mode hopping point that is closest to the peak point of the optical power spectrum along the I DBR increasing direction; The optical power of the outgoing light indicated by the mode hopping point is greater than the optical power of the outgoing light indicated by at least one adjacent point adjacent to the hopping point, and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is determined according to an optical power of the laser and an isolation of the MUX.
  • the device further includes:
  • a sending module configured to send the parameter of the adjusting laser.
  • the sending module is specifically configured to send a physical layer operation management and maintain a PL0AM message; a reserved reserve field in the PL0AM message or an adjustment control in the PL0AM message
  • the Tuning Control field carries the parameters of the adjustment laser.
  • a third aspect provides an optical network unit ONU, including: a laser, a first partial mirror, a second partial mirror, a wavelength division multiplexer MUX, and a photodiode PD, wherein the laser passes through the first partial mirror,
  • the MUX is connected to the second partial mirror, and the PD is connected to the first partial mirror;
  • the ONU further includes: a processor, connected to the PD and the laser; Outputting an optical signal within an adjustment range according to an instruction of the processor;
  • the PD configured to detect, by the first partial mirror and the MUX, an optical signal emitted by the laser to reach a second partial reflection a mirror, the reflected light reflected by the second partial mirror and passing through the MUX to the first partial mirror, obtaining optical power of the reflected light, and transmitting the optical power of the reflected light to the processor;
  • the processor is configured to indicate that the laser is within an adjustment range, and adjusts a phase of the laser to inject a current I or a temperature of a
  • the determining, by the processor, the optical power spectrum with the best axis symmetry from the obtained optical power spectrum as the target optical power spectrum specifically: the processing Calculates the symmetry value of each optical power spectrum + I is the first mode hopping point
  • Marked I DBR 2 is the second mode hop point indicated I DBR, / m is the optical power spectrum indicated a peak point i DBR; mode hopping of the first point along an decrease direction distance a mode hopping point closest to a peak point of the optical power spectrum; the second hopping point is a mode hopping point closest to a peak point of the optical power spectrum along an I DBR increasing direction; the processor is in each of the optical power spectra In the optical power spectrum with the smallest symmetry value, the target optical power spectrum with the best symmetry is used.
  • the processor indicates that the laser is within an adjustment range, and adjusts a phase of the laser Injecting the current Ip or the temperature of the gain region to obtain the optical power spectrum of the laser
  • the method specifically includes: the processor instructing the laser to be within an adjustment range and adjusting according to a preset length
  • the processor determines the measured optical power spectrum for each measured optical power spectrum Whether the first judgment condition, the second judgment condition, and the third judgment condition are satisfied; if the measured optical power spectrum satisfies the first determination condition, the second determination condition, and the third determination condition, the measured light is a power spectrum as the obtained optical power spectrum; if the measured optical power spectrum does not satisfy the first determination condition, and the obtained optical power spectrum already exists, stopping the measurement; wherein, the first Judge The threshold is determined according to the optical power of the laser and the optical loss of the reflected light in the optical transmission link; the second determining condition is the optical power difference of the reflected light between the first mode hopping point and the second mode hopping point.
  • the absolute value is smaller than the second threshold, and the second threshold is determined according to the optical power of the laser, the optical loss of the reflected light in the optical transmission link, and the isolation of the MUX; the third determining condition is a pair of optical power spectra.
  • I DBR indicated by the second mode hop, / m is the I DBR indicated by the peak point, and the third threshold is based on the laser power, the range of values of I, the channel bandwidth of the MUX, and the isolation of the MUX. Degree determined.
  • the optical power of the reflected light indicated by the mode hopping point is greater than the at least one of the hopping points
  • the optical power of the reflected light indicated by the adjacent neighboring point and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is based on the optical power of the laser and the MUX The isolation is determined.
  • the ONU further includes: a driving circuit; the driving circuit is connected to the processor and the laser, and is configured to adjust the laser within an adjustment range according to an instruction of the processor The phase region injects a current Ip or a temperature of the gain region; and the laser emits an optical signal under the driving of the driving circuit.
  • a fourth aspect provides an optical line terminal OLT, including: a laser, a first partial mirror, a second partial mirror, a wavelength division multiplexer MUX, and a photodiode PD, wherein the laser passes through the first partial mirror,
  • the MUX is connected to the second partial mirror, and the PD is connected to the first partial mirror;
  • the OLT further includes: a processor, connected to the PD and the laser; Outputting an optical signal within an adjustment range according to an instruction of the processor;
  • the PD configured to detect, by the first partial mirror and the MUX, an optical signal emitted by the laser to reach a second partial reflection a mirror, the reflected light reflected by the second partial mirror and passing through the MUX to the first partial mirror, obtaining optical power of the reflected light, and transmitting the optical power of the reflected light to the processor;
  • the processor is configured to indicate that the laser is within an adjustment range, and adjusts a phase of the laser to inject a current I or a temperature of a
  • the determining, by the processor, the optical power spectrum with the best axis symmetry from the obtained optical power spectrum as the target optical power spectrum specifically includes: the processor Calculate the symmetry value of each optical power spectrum + I
  • the dish is the I DBR indicated by the second mode point, / m is the I DBR indicated by the peak point of the optical power spectrum ;
  • the first mode hop point is the peak of the optical power spectrum along the decreasing direction of the I DBR Pointing the nearest mode hopping point;
  • the second hopping point is a mode hopping point that is closest to the peak point of the optical power spectrum along the increasing direction; the processor will have the smallest among the optical power spectra
  • the optical power spectrum of the symmetry value is used as the symmetrical optimal target optical power spectrum.
  • the processor indicates that the laser is within an adjustment range, and adjusts a phase of the laser Injecting the current Ip or the temperature of the gain region to obtain the optical power spectrum of the laser
  • the method specifically includes: the processor instructing the laser to adjust the temperature of the Iphas6 or the gain region according to a preset length within the adjustment range, and Instructing the PD to measure the optical power of the reflected light to measure an optical power spectrum; the processor determining, for each measured optical power spectrum, whether the measured optical power spectrum satisfies a first determining condition, a second determination condition and a third determination condition; if the measured optical power spectrum satisfies the first determination condition, the second determination condition, and the third determination condition, the measured optical power spectrum is taken as the obtained light a power spectrum; if the measured optical power spectrum does not satisfy the first determining condition, and the obtained optical power spectrum already exists, stopping the measurement; wherein, the processor instructing the laser to adjust the temperature of the Iphas6 or the gain region according to a preset length within the
  • I is less than a third threshold, wherein I DBR 1 is indicated by the first mode hop point
  • I DBR indicated by the second mode hop, / m is the I DBR indicated by the peak point, and the third threshold is based on the laser power, the range of values of I, the channel bandwidth of the MUX, and the isolation of the MUX. Degree determined.
  • the optical power of the reflected light indicated by the jumping mode point is greater than the at least one of the jumping mode points
  • the optical power of the reflected light indicated by the adjacent neighboring point and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is based on the optical power of the laser and the MUX Isolation
  • the 0LT further includes: a driving circuit; the driving circuit, and the processing And the laser is connected to adjust a phase injection current Ip or a temperature of the gain region of the laser within an adjustment range according to an indication of the processor; the laser is driven by the driving circuit , the light signal is emitted.
  • a fifth aspect provides an optical line terminal OLT comprising: a wavelength division multiplexer MUX, a receiver, a transmitter, and a processor; wherein the processor is respectively connected to the receiver and the transmitter; a receiver for detecting an optical signal emitted by the laser through the transmitted light of the MUX to obtain optical power of the transmitted light; the processor, configured to instruct the laser to adjust a phase region injection within an adjustment range a current I Phas6 or a temperature of the gain region, the optical power spectrum of the laser is obtained, the optical power spectrum indicating a correspondence between a current I of a Bragg reflection region of the laser and an optical power of the transmitted light obtained by the receiver; Obtaining an optical power spectrum with the best axial symmetry in the obtained optical power spectrum as the target optical power spectrum; determining the temperature of the I or gain region corresponding to the target optical power spectrum, and the peak point in the target optical power spectrum I, at least two parameters are used as parameters for adjusting the laser; and the transmitter is configured to transmit parameters of the adjustment laser.
  • the determining, by the processor, the optical power spectrum with the best axis symmetry from the obtained optical power spectrum as the target optical power spectrum specifically includes:
  • I DBR , / 2 is the I DBR indicated by the second mode hopping point
  • is the i DBR of the peak point of the optical power spectrum marked with /"
  • the first mode hopping point is decreased along 1, a mode hopping point that is closest to a peak point of the optical power spectrum
  • the second hopping point is a mode hopping point that is closest to a peak point of the optical power spectrum along an I DBR increasing direction
  • the processor is in each of the light In the power spectrum, the optical power spectrum with the smallest symmetry value is taken as the target optical power spectrum with the best symmetry.
  • the processor in the adjustment range, instructs the laser to adjust the phase region injection current Ip or gain The temperature of the region, obtaining the optical power spectrum of the laser, specifically: the processor is within the adjustment range, instructing the laser to adjust the temperature of the Ip or the gain region according to a preset length, and measuring the optical power spectrum; Determining, for each measured optical power spectrum, whether the measured optical power spectrum satisfies a first determining condition, a second determining condition, and a third determining condition; if the measured optical power spectrum satisfies the first determination a condition, the second determining condition, and the third determining condition, storing the measured optical power spectrum; if the measured optical power spectrum does not satisfy the first determining condition, and the obtained The optical power spectrum is used to stop the measurement; wherein the first determining condition is that the optical power of the transmitted light indicated by the peak point of the optical power spectrum is greater than a first determining condition
  • T + I is less than the third threshold, where /. I DBR indicated by the first hop point, 1 is
  • the I DBR indicated by the second mode hopping point, / m is the I DBR indicated by the peak point, and the third threshold is based on the optical power of the laser, the range of the I DBR , the channel bandwidth of the MUX, and the isolation of the MUX. definite.
  • the optical power of the reflected light indicated by the jumping mode point is greater than the at least one of the jumping mode points
  • the optical power of the reflected light indicated by the adjacent neighboring point and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is based on the optical power of the laser and the MUX The isolation is determined.
  • the sending, by the sending, the parameter of the adjusting laser specifically: the sending, by the sending, the physical layer operation management and the maintenance of the PL0AM message; the reserved Reserve field in the PL0AM message or the PL0AM message
  • the adjustment controller Tuning Control field carries the parameters of the adjustment laser.
  • a sixth aspect is to provide a passive optical network PON system, including the optical line terminal OLT as described in the fifth aspect, and an optical network unit ONN; the OLT is connected to the ONU; The indication of 0LT is to adjust the phase injection current I Pha of the laser or the temperature of the gain region; and receive the parameters of the adjustment laser transmitted by the OLT, and perform wavelength alignment according to the parameters of the adjustment laser.
  • the wavelength alignment method and device for the laser provided by the embodiment of the present invention, the 0NU, 0LT , and PON systems adjust the temperature of the I Phas6 or the gain region of the laser by adjusting the range.
  • the optical power spectrum of the optical device, and then determining the optical power spectrum with the best axial symmetry from the respective optical power spectra as the target optical power spectrum, the I P or the temperature of the gain region corresponding to the determined target optical power spectrum, and the target light At least two parameters of the I DBR indicated by the peak points in the power spectrum are used as parameters for adjusting the laser, thereby avoiding the use of a mapping table between the laser parameters and the wavelength of the emitted light, determining the parameters of the adjustment laser, and reducing the cost of the laser.
  • Figure 1 is a schematic view showing the structure of a DBR laser
  • FIG. 2 is a schematic flow chart of a method for wavelength alignment of a laser according to a first embodiment of the present invention
  • Figure 3 is an optical path diagram of reflected light
  • FIG. 4 is a schematic structural view of a wavelength aligning device for a laser according to a second embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a 0NU according to a third embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an 0LT according to a fourth embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a wavelength alignment method of a laser according to a fifth embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a wavelength aligning device for a laser according to a sixth embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a 0LT 90 according to a seventh embodiment of the present invention
  • FIG. 10 is a schematic structural diagram of a P0N system according to an eighth embodiment of the present invention.
  • the DBR laser is a tunable laser, including a gain region for emitting light waves, and a phase shift region and a DBR region are sequentially disposed in the opposite direction of the light exiting the gain region.
  • FIG. 1 is a schematic structural view of the DBR laser, as shown in FIG. The method includes: a gain region, a phase shift region, and a DBR region, wherein the DBR region includes a DBR grating for performing DBR reflection on the light wave phase-shifted by the phase shift region.
  • DBR lasers can not only Using I Ph ⁇ and I, these two parameters adjust the wavelength of the light emitted by the DBR laser; in the implementation process, for the sake of simplicity, the temperature of the gain region and the two parameters can be adjusted to adjust the wavelength of the light emitted by the DBR laser.
  • the wavelength is aligned, that is, the wavelength of the exiting light of the laser is matched to the pass band of the MUX.
  • the lasers mentioned in the following embodiments may each be a DBR laser.
  • optical power spectra mentioned in the following embodiments are all used to indicate the correspondence between the I of the laser and the optical power of the emitted light of the laser.
  • the emitted light may be an optical signal emitted by the laser passing through a part of the mirror and the MUX, reaching the second partial mirror, being reflected by the second partial mirror and passing through the MUX to the first partial mirror, and the obtained reflected light;
  • the embodiment can be referred to the following first embodiment, second embodiment, third embodiment and fourth embodiment.
  • the emitted light may be a transmitted light obtained by passing the optical signal emitted by the laser through the MUX; and the fifth embodiment, the sixth embodiment, the seventh embodiment, and the eighth An embodiment.
  • FIG. 2 is a schematic flowchart of a method for wavelength alignment of a laser according to a first embodiment of the present invention.
  • the method in this embodiment may be implemented by the ONU to perform wavelength alignment on a laser in the ONU, or may be implemented by 0LT.
  • the implementation is performed to perform wavelength alignment on the laser in the OLT.
  • the embodiment may include:
  • the optical power spectrum is established in a two-dimensional Cartesian coordinate system, the horizontal axis indicates the injection current I DBR of the DBR region, and the vertical axis indicates the optical power of the reflected light, which is used to indicate the injection current I DBR and the vertical axis of the DBR region indicated by the horizontal axis.
  • the reflected light is obtained by the partial mirror reflection of the portion of the DBR laser that is transmitted through the MUX.
  • FIG. 3 is an optical path diagram of the reflected light. As shown in FIG.
  • the laser 30 passes through A part of the mirror 31, the MUX 33 and the second partial mirror 32 are connected, a photodiode (PD) 34 is connected to the first partial mirror 31, and the emitted light of the laser 30 passes through the first partial mirror 31 and the MUX 33 to reach the second
  • the first partial mirror 31 may be a polarization beam splitter (PBS, Polarization Beam Splitter) or a beam splitter or the like
  • the second partial mirror 32 may be a Faraday Rotation Mirror (F body, Faraday Rotation Mirror), etc.; Think of Array Wave Grat ing (AWG).
  • the temperature of the Ip or the gain region of the laser is gradually increased or decreased, and the adjustment is performed according to a preset length, and each Ip is measured. Or the optical power spectrum corresponding to the temperature of the gain region.
  • the steps A and B are repeatedly performed until the measured optical power spectrum does not satisfy the first determination condition, and the obtained optical power spectrum already exists, then the measurement is stopped:
  • Step A In the adjustment range, the temperature of the Ip or the gain zone is gradually increased or gradually decreased, and adjusted according to the preset length, and the optical power spectrum corresponding to the temperature of the current Ip or the gain zone is measured;
  • Step B determining whether the measured optical power spectrum satisfies a first determining condition, a second determining condition, and a third determining condition; if the measured optical power spectrum satisfies a first determining condition, a second determining condition, and In the third determination condition, the measured optical power spectrum is taken as the obtained optical power spectrum.
  • the first determining condition is that the optical power of the reflected light indicated by the peak point of the optical power spectrum is greater than a first threshold, and the first threshold is based on the optical power of the laser and the light of the reflected light in the optical transmission link. Determining the loss; the second determining condition is that the absolute value of the optical power difference of the reflected light between the first mode hopping point and the second hopping point is less than a second threshold, and the second threshold is based on the optical power of the laser
  • the three judgment conditions of the reflected light on the optical transmission link are the symmetric values of the optical power spectrum.
  • the value range, the channel bandwidth of the MUX, and the isolation of the MUX are determined.
  • the optical power spectrum is filtered by using the first determining condition, the second determining condition, and the third determining condition in the process of obtaining the optical power spectrum, and the light obtained by the current test is selected when the optical power spectrum satisfying the above three conditions is selected. At the power spectrum, the test is stopped, thereby accelerating the progress of obtaining the optical power spectrum.
  • the first mode hop point is along I.
  • the BR reduces a mode hopping point that is closest to a peak point of the optical power spectrum; the second hopping point is a mode hopping point that is closest to the peak point in an I DBR increasing direction.
  • the optical power of the reflected mode of the reflected mode is greater than the optical power of the reflected light indicated by the adjacent point adjacent to the jumping point, and the optical power indicated by the adjacent point
  • the difference is greater than a fourth threshold, wherein the fourth threshold is determined according to the optical power of the DBR laser and the isolation of the MUX, such as: taking a fourth threshold of 8 dB.
  • the interval between the main mode and the side mode of the three-stage DBR laser generally exceeds the channel bandwidth of the MUX. When the main mode is located near the bandwidth of the MUX channel, the side mode will fall on the channel.
  • the side mode transmittance is very low, and a significant optical power abrupt change can be detected, which is generally a tens of dB change, so that the first mode hop point can be clearly detected.
  • the position of the second-hop mode point is 0 2
  • the center point 0 between the two mode-hopping points is generally the place where the Side Mode Suppression Ratio (SSR) is the largest.
  • SSR Side Mode Suppression Ratio
  • the dish is the i DBR indicated by the second mode point, / m is the i DBR indicated by the peak point. Determining the mode hopping point in this way allows the wavelength aligned laser to have a higher SMSR.
  • the i Ph ⁇ or gain zone temperature of the laser when the target optical power spectrum is measured, and the I DBR indicated by the peak point in the target optical power spectrum are used as parameters of the adjustment laser to implement the laser Wavelength alignment.
  • the emission-eye reduction ratio of the wavelength-aligned laser can also be adjusted.
  • ER emission eye extinction ratio
  • a laser driver LDD, LD Driver
  • LDD laser driver
  • extinction ratio monitoring and adjustment function given ER value
  • LDD can adjust the ER to the set value.
  • the emitted light indicating a series of "1" and "0" signals is transmitted at a certain frequency, and the respective indications "1” and "0" reflected by the Faraday rotating mirror are monitored. "The optical power of the outgoing light and P.
  • El ⁇ lOlg d/Pa) (dB), that is, the ER can be adjusted by changing the modulation and bias current of the DBR laser. Sending a string of "1" and "0" at a certain frequency is for more accurate measurement of the ER.
  • 201 it may also include: Performing a factory inspection of the laser. Specifically, if the temperature range of the gain region of the laser is , 2 ), generally 0 ⁇ 1 2 -1 ⁇ 10, and the range of I phasE is (I P1 , I P2 ), and the range of I DBR is (I D1 , I D2 ) , where T ⁇ T 2 , I P1 ⁇ I P2 , I D1 ⁇ I D2 , then the temperature in the gain region of the laser is T 2 , 1 ⁇ is I D1
  • a fifth threshold such as: taking a fifth threshold of 35 dB; operating temperature of the laser is T 2 , 1, Under the condition of I D2 , by adjusting I phas 6 , a second exit light that satisfies the exit mode of the laser and has a side mode suppression ratio greater than
  • corresponds to the wavelength adjustable range ( , ⁇ 2 ) , ⁇ 3 - ⁇ 4
  • the wavelength adjustable range of the emitted light of the laser can cover the channel bandwidth of all channels in the MUX, that is, determine that the laser matches the MUX.
  • the wavelength alignment method of the laser determines the optical power spectrum of the laser by adjusting the temperature of the I P or the gain region of the laser within the adjustment range, and then determines the most axial symmetry from each optical power spectrum.
  • the good optical power spectrum is the target optical power spectrum, and the temperature of the Ip or the gain region corresponding to the determined target optical power spectrum, and at least two parameters of the I DBR indicated by the peak point in the target optical power spectrum are used as parameters for adjusting the laser. Therefore, the mapping between the laser parameters and the wavelength of the emitted light is avoided, and the parameters of the laser are determined to reduce the cost of the laser.
  • 4 is a schematic structural diagram of a wavelength aligning device for a laser according to a second embodiment of the present invention.
  • the wavelength aligning device provided in this embodiment may be disposed in the 0LT to perform wavelength alignment on the laser in the 0LT.
  • the wavelength alignment device of the laser in the ONU can also be disposed in the ONU.
  • the wavelength alignment device of the laser in this embodiment includes: an obtaining module 41, a determining module 42 and a parameter module 43.
  • the obtaining module 41 is configured to adjust the phase of the laser injection current I Ph ⁇ or the temperature of the gain region within the adjustment range to obtain an optical power spectrum of the laser.
  • the optical power spectrum indicates a correspondence between the current I of the Bragg reflection region of the laser and the optical power of the reflected light of the laser; the reflected light is emitted by the laser through the first partial mirror and the MUX Reaching the second partial mirror, reflected by the second partial mirror and reaching the first partial mirror through the MUX, obtained by the PD detection.
  • the obtaining module 41 is specifically configured to: in the adjustment range, adjust the temperature of the I or the gain region according to the preset length, and measure the optical power spectrum; and determine, for each measured optical power spectrum, the measured Whether the optical power spectrum satisfies the first determining condition, the second determining condition, and the third determining condition; if the measured optical power spectrum satisfies the first determining condition, the second determining condition, and the third determining condition, the measuring Obtaining an optical power spectrum as the obtained optical power spectrum; if the measured optical power spectrum does not satisfy the first determination condition, and the obtained optical power spectrum already exists, stopping the measurement;
  • the first determining condition is that the optical power of the reflected light indicated by the peak point of the optical power spectrum is greater than a first threshold, and the first threshold is determined according to the optical power of the laser and the optical loss of the reflected light in the optical transmission link.
  • the second determining condition is that the absolute value of the optical power difference of the reflected light between the first mode hopping point and the second hopping point is less than a second threshold, and the second threshold is based on the optical power of the laser, Light loss in the optical transmission link and determine the MUX isolation;
  • third determination condition is a mode-hopping point
  • the labeled I DBR 2 is the i DBR indicated by the second mode hop point, / m is the I DBR indicated by the peak point, and the third threshold is based on the laser light output power, I, the value range, and the MUX channel. The bandwidth and the isolation of the MUX are determined.
  • the determining module 42 is coupled to the obtaining module 41 for determining an optical power spectrum having the best axis symmetry from the obtained optical power spectrum as a target optical power spectrum.
  • the determining module may include: a calculating unit, configured to calculate each optical power spectrum
  • the i DBR indicated by the mode point, / m is the i DBR indicated by the peak point of the optical power spectrum ;
  • the first mode hopping point is the mode hop closest to the peak point of the optical power spectrum along the decreasing direction of the I DBR Point;
  • the second mode hopping point is a mode hopping point which is closest to the peak point of the optical power spectrum along the I direction;
  • the determining unit is configured to, in each of the optical power spectra, the light having the smallest symmetry value The power spectrum is used as the best target optical power spectrum for symmetry.
  • the optical power of the reflected light indicated by the mode hopping point is greater than the optical power of the reflected light indicated by at least one adjacent point adjacent to the hopping point, and the optical power indicated by the adjacent point is The difference is greater than a fourth threshold; the fourth threshold is determined according to the optical power of the laser and the isolation of the MUX.
  • a parameter module 43 is connected to the determining module 42 and configured to correspond to the determined target optical power spectrum
  • the temperature of the Ip or gain region, and at least two of the I, indicated by the peak point in the target optical power spectrum, are used as parameters for adjusting the laser.
  • the functional modules of the wavelength aligning device of the laser provided in this embodiment are used to perform the wavelength aligning method of the laser shown in the first embodiment.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the optical power spectrum of the laser is obtained, and then the optical power spectrum with the best axial symmetry is determined from each optical power spectrum as the target optical power.
  • the spectrum, the Ip or the temperature of the gain region corresponding to the determined target optical power spectrum, and the I indicated by the peak point in the target optical power spectrum, at least two parameters are used as parameters for adjusting the laser, thereby avoiding the use of laser parameters and outgoing light wavelengths.
  • the mapping table determines the parameters of the laser and reduces the cost of the laser.
  • FIG. 5 is a schematic structural diagram of a 0NU according to a third embodiment of the present invention, including: a laser 51, a first partial mirror 52, a second partial mirror 53, an MUX 54 and a PD 55, and the 0NU further includes a processor 56.
  • the laser 51 is connected by the first partial mirror 52, the MUX 54 and the second partial mirror 53, the PD 55 is connected to the first partial mirror 52, and the processor 56 and the PD 55 and the The laser 51 is connected.
  • the connection between the processor 56 and the PD 55 and the laser 51 is electrically connected; the laser 51 passes through the connection between the first partial mirror 52, the MUX 54 and the second partial mirror 53, And the connection between the PD 55 and the first partial mirror 52 is an optical connection.
  • the solid line is an electrical connection
  • the solid arrow line is an optical connection
  • the direction of the arrow is a light propagation direction.
  • the laser 51 is configured to emit an optical signal within an adjustment range according to an indication of the processor 56.
  • the PD 55 is configured to detect emission by the laser 51 through the first partial mirror
  • the processor 56 is configured to instruct the laser 51 to adjust a phase current injection current Ip or a temperature of a gain region of the laser within an adjustment range to obtain an optical power spectrum of the laser.
  • the optical power spectrum indicates the correspondence between the current I of the Bragg reflection region of the laser and the optical power of the reflected light obtained by the PD detection; determining the optical power spectrum with the best axial symmetry from the obtained optical power spectrum as the target light Power spectrum; the temperature of the I or gain region corresponding to the determined target optical power spectrum, at least two parameters of the I DBR indicated by the peak point in the standard optical power spectrum as the adjustment laser
  • the processor 56 indicates that the laser is within the adjustment range, and adjusts the phase injection current I Phas6 or the temperature of the gain region of the laser to obtain the optical power spectrum of the laser, which specifically includes: the processor 56 indicates The laser adjusts the temperature of the Ip or the gain region according to a preset length within the adjustment range, and instructs the PD to measure the optical power of the reflected light to measure an optical power spectrum; the processor 56 for each measurement Obtaining an optical power spectrum, determining whether the measured optical power spectrum satisfies a first determining condition, a second determining condition, and a third determining condition; if the measured optical power spectrum satisfies a first determining condition, a second determining a condition and a third determining condition, the measured optical power spectrum is taken as the obtained optical power spectrum; if the measured optical power spectrum does not satisfy the first determining condition, and the obtained The optical power spectrum of the optical power spectrum is stopped, wherein the first determining condition is that the optical power of the reflected light indicated by the peak point
  • I DBR indicated by the second mode hop, / m is the I DBR indicated by the peak point, and the third threshold is based on the laser power, the range of values of I, the channel bandwidth of the MUX, and the isolation of the MUX. Degree determined.
  • the processor 56 determines the optical power spectrum with the best axis symmetry from the obtained optical power spectrum as the target optical power spectrum, and specifically includes: the processor 56 calculates a symmetric value hopping of each optical power spectrum.
  • the labeled I DBR , / m is the I DBR indicated by the peak point of the optical power spectrum ;
  • the first mode hopping point is the mode hop point along the I, decreasing direction from the peak point of the optical power spectrum;
  • the second mode hopping point is a mode hopping point that is closest to the peak point of the optical power spectrum along the I DBR increasing direction;
  • the processor 56 uses the optical power spectrum having the smallest symmetry value in each of the optical power spectra as The target optical power spectrum with the best symmetry.
  • the optical power of the reflected light indicated by the mode hopping point is greater than the optical power of the reflected light indicated by at least one adjacent point adjacent to the hopping point, and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is determined according to an optical power of the laser and an isolation of the MUX.
  • 0NU may further include a driving circuit connected to the processor 56 and the laser 51 for adjusting the phase of the laser 51 within an adjustment range according to the instruction of the processor 56.
  • the region injects current I Phas6 or the temperature of the gain region.
  • the functional modules of the ONU provided in this embodiment can be used to perform the wavelength alignment method of the laser shown in the first embodiment. The specific working principle is not described here. For details, refer to the description of the method embodiments.
  • FIG. 6 is a schematic structural diagram of an OLT according to a fourth embodiment of the present invention.
  • the OLT in the embodiment includes a laser 61, a first partial mirror 62, a second partial mirror 63, and a MUX 64.
  • the PD 65, 0LT also includes a processor 66.
  • the laser 61 is connected by the first partial mirror 62, the MUX 64 and the second partial mirror 63, the PD 65 is connected to the first partial mirror 62, and the processor 66 and the PD 65 and the The laser 61 is connected.
  • the connection between the processor 66 and the PD 65 and the laser 61 is electrically connected; the laser 61 passes through the connection between the first partial mirror 62, the MUX 64 and the second partial mirror 63, And the connection between the PD 65 and the first partial mirror 62 is optically connected.
  • the solid line is an electrical connection
  • the solid arrow line is an optical connection
  • the direction of the arrow is a light propagation direction.
  • the laser 61 is configured to emit an optical signal within an adjustment range according to an indication of the processor 66.
  • the PD 65 is configured to be detected by the laser 61, passes through the first partial mirror 62 and the MUX 64, reaches the second partial mirror 63, is reflected by the second partial mirror 63, and passes through the The reflected light of the MUX 64 reaching the first partial mirror 62 is obtained to obtain the optical power of the reflected light.
  • the processor 66 is configured to instruct the laser 61 to adjust a phase of the laser to inject a current I or a temperature of a gain region within an adjustment range to obtain an optical power spectrum of the laser, where the optical power spectrum indicates a laser Corresponding relationship between the current I of the Bragg reflection region and the optical power of the reflected light obtained by the PD detection; determining the optical power spectrum having the best axial symmetry from the obtained optical power spectrum as the target optical power spectrum; The Ip or the temperature of the gain region corresponding to the target optical power spectrum, And at least two parameters in the i DBR indicated by the peak point in the target optical power spectrum are used as parameters of the adjustment laser.
  • the processor 66 indicates that the laser is within the adjustment range, and adjusts the phase injection current I Phas6 or the temperature of the gain region of the laser to obtain the optical power spectrum of the laser, which specifically includes: the processor 66 indicates The laser adjusts the temperature of the Ip or the gain region according to a preset length within the adjustment range, and instructs the PD to measure the optical power of the reflected light to measure an optical power spectrum; the processor 66 for each measurement Obtaining an optical power spectrum, determining whether the measured optical power spectrum satisfies a first determining condition, a second determining condition, and a third determining condition; if the measured optical power spectrum satisfies a first determining condition, a second determining a condition and a third determining condition, the measured optical power spectrum is taken as the obtained optical power spectrum; if the measured optical power spectrum does not satisfy the first determining condition, and the obtained The optical power spectrum of the optical power spectrum is stopped, wherein the first determining condition is that the optical power of the reflected light indicated by
  • I DBR indicated by the second mode hop, / m is the I DBR indicated by the peak point, and the third threshold is based on the laser power, the range of values of I, the channel bandwidth of the MUX, and the isolation of the MUX. Degree determined.
  • the processor 66 determines the optical power spectrum with the best axis symmetry from the obtained optical power spectrum as the target optical power spectrum, and specifically includes: the processor 56 calculates the symmetry value of each optical power spectrum is the first Two-hop mode point
  • the labeled I DBR , / m is the I DBR indicated by the peak point of the optical power spectrum ;
  • the first mode hopping point is the mode hop point along the I, decreasing direction from the peak point of the optical power spectrum;
  • the second mode hopping point is a mode hopping point that is closest to the peak point of the optical power spectrum along the I DBR increasing direction;
  • the processor 56 uses the optical power spectrum having the smallest symmetry value in each of the optical power spectra as The target optical power spectrum with the best symmetry.
  • the optical power of the reflected light indicated by the mode hopping point is greater than the optical power of the reflected light indicated by at least one adjacent point adjacent to the hopping point, and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is determined according to an optical power of the laser and an isolation of the MUX.
  • a driving circuit is further included, and the driving circuit is connected to the processor 66 and the laser 61 for adjusting a phase region of the laser 61 within an adjustment range according to an instruction of the processor 66. Inject current I Phas6 or the temperature of the gain region.
  • the functional modules of the 0LT provided in this embodiment can be used to perform the wavelength alignment method of the laser shown in the first embodiment.
  • the specific working principle is not described here. For details, refer to the description of the method embodiments.
  • FIG. 7 is a flowchart of a method for wavelength alignment of a laser according to a fifth embodiment of the present invention.
  • the wavelength alignment method of the laser in this embodiment can be implemented by 0LT, and the laser in the ONU is wavelength-aligned, and the laser is connected to the optical line terminal OLT through the MUX, and the emitted light of the laser passes through The MUX is sent to the OLT, and the OLT detects that the transmitted light is obtained.
  • the method includes:
  • the optical power spectrum indicates the correspondence between the current I of the Bragg reflection region of the laser and the optical power of the transmitted light.
  • the laser is instructed to adjust the temperature of the Ip or the gain region according to a preset length, and the optical power spectrum is measured; and the measured optical power spectrum is determined for each measured optical power spectrum. Whether the first judgment condition, the second judgment condition, and the third judgment condition are satisfied; if the measured optical power spectrum satisfies the first judgment condition, the second judgment condition, and the third judgment condition, the measurement is saved Optical power spectrum; if the measured optical power spectrum does not satisfy the first determination condition, and the obtained optical power spectrum already exists, the measurement is stopped.
  • the first determining condition is that the optical power of the transmitted light indicated by the peak point of the optical power spectrum is greater than a first threshold, and the first threshold is based on the optical power of the laser and the light of the transmitted light in the optical transmission link. Determining the loss; the second determining condition is that an absolute value of the optical power difference of the transmitted light between the first mode hopping point and the second mode hopping point is less than a second threshold, and the second threshold is based on the optical power of the laser And determining, by the optical loss of the transmitted light in the optical transmission link and the isolation of the MUX; the third determining condition is that the symmetric value of the optical power spectrum + I is less than a third threshold, wherein / is.
  • the dish is the I DBR , I DBR2 3 ⁇ 4 as indicated by the first jump point
  • the I DBR indicated by the second mode hopping point, / m is the I DBR indicated by the peak point, and the third threshold is based on the optical power of the laser, the range of the I DBR , the channel bandwidth of the MUX, and the isolation of the MUX. definite.
  • Mode-hop point indicated i DBR 2 is a second mode hop point indicated i DBR
  • is the optical power spectrum of the peak point marked I DBR
  • mode hopping of the first point along the I Save a mode hopping point that is closest to the peak point of the optical power spectrum in the small direction
  • the second hopping point is a mode hopping point that is closest to the peak point of the optical power spectrum along the I DBR increasing direction
  • the optical power spectrum with the smallest symmetry value is taken as the target optical power spectrum with the best symmetry.
  • the optical power of the reflected light indicated by the mode hopping point is greater than the optical power of the reflected light indicated by at least one adjacent point adjacent to the hopping point, and the optical power indicated by the adjacent point is The difference is greater than a fourth threshold; the fourth threshold is determined according to the optical power of the laser and the isolation of the MUX.
  • the Tuning Control field carries the parameters of the adjustment laser. In order for the 0NU to align the laser in the 0NU according to the parameters of the adjustment laser.
  • FIG. 8 is a schematic structural diagram of a wavelength aligning device for a laser according to a sixth embodiment of the present invention.
  • the wavelength aligning device of the laser in the embodiment is disposed in the 0LT to perform wavelength alignment on the laser in the ONU.
  • the wavelength aligning device of the laser includes: an obtaining module 81 determining module 82, a parameter module 83, and a transmitting module 84.
  • the obtaining module 81 is configured to, within the adjustment range, instruct the laser to adjust the phase region injection current Ip or the temperature of the gain region to obtain an optical power spectrum of the laser.
  • the optical power spectrum indicates a correspondence between the current I of the Bragg reflection region of the laser and the optical power of the transmitted light; and the transmitted light is the wavelength of the emitted light of the laser disposed in the optical network unit ONN.
  • the multiplexer MUX arrives at the optical line terminal OLT and is obtained by the OLT detection.
  • the obtaining module 81 is specifically configured to: in the adjustment range, instruct the laser to adjust the temperature of the Ip haS e or the gain region according to a preset length, and measure the optical power spectrum; for each measured optical power spectrum, Determining whether the measured optical power spectrum satisfies the first determining condition, the second determining condition, and the third determining condition; if the measured optical power spectrum satisfies the first determining condition, the second determining condition, and the And determining, by the third determining condition, the measured optical power spectrum; if the measured optical power spectrum does not satisfy the first determining condition, and the obtained optical power spectrum already exists, stopping the measurement;
  • the first determining condition is that the optical power of the transmitted light indicated by the peak point of the optical power spectrum is greater than a first threshold, and the first threshold is determined according to the optical power of the laser and the optical loss of the transmitted light in the optical transmission link.
  • the second determining condition is that the absolute value of the optical power difference of the transmitted light between the first mode hopping point and the second mode hopping point is less than a second threshold, and the second threshold is based on the optical power of the laser, MUX emitted light loss and isolation in the optical transmission link is determined; and the third determination condition is L marked by the jump point For the I DBR indicated by the peak point, the third threshold is determined according to the optical power of the laser, the range of values of I, the channel bandwidth of the MUX, and the isolation of the MUX.
  • the determining module 82 is connected to the obtaining module 81 for determining the optical power spectrum with the best axis symmetry from the obtained optical power spectrum as the target optical power spectrum.
  • the determining module may include: a calculating unit, configured to calculate each optical power spectrum
  • the I DBR indicated by the mode point, / m is the I DBR indicated by the peak point of the optical power spectrum ;
  • the first mode hopping point is the mode hop closest to the peak point of the optical power spectrum along the decreasing direction of the I DBR
  • a second mode hopping point is a mode hopping point which is closest to a peak point of the optical power spectrum along an increasing direction, and an optical power of the reflected light indicated by the hopping point is greater than at least one and the hopping mode
  • the optical power of the reflected light indicated by the adjacent adjacent point of the point, and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is based on the optical power of the laser and the The isolation of the MUX is determined.
  • the determining module may further include a determining unit configured to use, in each of the optical power spectra, an optical power spectrum having a minimum symmetry value as a target optical power spectrum that is optimal in symmetry.
  • a parameter module 83 connected to the determining module 82, for determining the determined target optical power spectrum
  • Ipha or the temperature of the gain zone, and the I indicated by the peak point in the target optical power spectrum, at least two: the number is used as a parameter for adjusting the laser.
  • the sending module 84 is connected to the parameter module 83 for transmitting parameters of the adjusting laser.
  • the sending module 84 is specifically configured to send a PL0AM message; a Reserve field in the PL0AM message or a Tuning Control field in the PL0AM message carries a parameter of the adjusting laser.
  • the functional modules of the wavelength aligning device of the laser provided in this embodiment can be used to perform the wavelength alignment method of the laser of the fifth embodiment. The specific working principle is not described here. For details, refer to the description of the method embodiment.
  • FIG. 9 is a schematic structural diagram of an OLT 90 according to a seventh embodiment of the present invention. As shown in FIG. 9, the 0LT 90 in this embodiment is used for wavelength alignment of a laser in the ONU, including: MUX 91. Receiver 92, transmitter 93 and processor 94.
  • the MUX 91 is coupled to a receiver 92, which is coupled to the receiver 92 and the transmitter 93, respectively.
  • the connection between the MUX 91 and the receiver 92 is an optical connection, and the connection between the processor 94 and the receiver 92 and the transmitter 93 is electrically connected.
  • the solid line is electrical. Connected, the solid arrow line is the light connection, and the direction of the arrow is the light propagation direction.
  • the receiver 92 is configured to detect, by the laser, the optical power of the transmitted light by the transmitted light of the MUX.
  • the processor 94 is configured to, within an adjustment range, instruct the laser to adjust a phase region injection current Ip or a temperature of a gain region to obtain an optical power spectrum of the laser, where the optical power spectrum indicates a Bragg reflection region of the laser a current I, a correspondence relationship with the optical power of the transmitted light obtained by the receiver; determining an optical power spectrum having the best axial symmetry from the obtained optical power spectrum as a target optical power spectrum; and correspondingly determining the determined target optical power spectrum
  • the Ip or the temperature of the gain region, and the I indicated by the peak point in the target optical power spectrum at least two parameters are used as parameters for adjusting the laser.
  • the transmitter 93 is configured to send parameters of the adjustment laser.
  • the processor 94 instructs the laser to adjust the phase region injection current I or the temperature of the gain region to obtain the optical power spectrum of the laser, which specifically includes: the processor 94 is within the adjustment range, indicating the The laser adjusts the temperature of the Ip or the gain region according to the preset length, and measures the optical power spectrum; the processor 94 determines, for each measured optical power spectrum, whether the measured optical power spectrum satisfies the first determining condition, a second determination condition and a third determination condition; if the measured optical power spectrum satisfies the first determination condition, the second determination condition, and the third determination condition, Preserving the measured optical power spectrum; if the measured optical power spectrum does not satisfy the first determining condition, and the obtained optical power spectrum already exists, stopping the measurement; wherein, the first determining condition is The optical power of the transmitted light indicated by the peak point of the optical power spectrum is greater than a first threshold, the first threshold being determined according to the optical power of the laser and the optical loss of the transmitted light in the optical transmission link
  • the I DBR indicated by the second mode hopping point, / m is the I DBR indicated by the peak point, and the third threshold is based on the optical power of the laser, the range of the I DBR , the channel bandwidth of the MUX, and the isolation of the MUX. definite.
  • the processor 94 determines the optical power spectrum with the best axis symmetry from the obtained optical power spectrum as the target optical power spectrum, and specifically includes: the processor 94 calculates a symmetrical value of each optical power spectrum + I / 1 is the I DBR indicated by the first hopping point, / 2 is the second hopping point
  • the labeled I DBR , / m is the I DBR indicated by the peak point of the optical power spectrum ;
  • the first mode hopping point is the mode hop point along the I, decreasing direction from the peak point of the optical power spectrum;
  • the second mode hopping point is a mode hopping point which is closest to the peak point of the optical power spectrum along the increasing direction of the I DBR , and the optical power of the reflected light indicated by the hopping point is greater than at least one adjacent to the hopping point
  • the optical power of the reflected light indicated by the adjacent point, and the difference between the optical power indicated by the adjacent point is greater than a fourth threshold; the fourth threshold is based on the optical power of the laser and the MUX
  • the isolation is determined.
  • the processor 94 uses the optical power spectrum having the smallest symmetry value as the target optical power spectrum with the best symmetry in each of the optical power spectra.
  • the transmitter 93 sends the parameters of the adjustment laser, which specifically includes: a transmitter
  • the PL0AM message is sent; the Reserve field in the PL0AM message or the Tuning Control field in the PL0AM message carries the parameter of the adjustment laser.
  • the function modules of the 0LT provided in this embodiment can be used to perform the wavelength alignment method of the laser of the fifth embodiment.
  • the specific working principle is not described here. For details, refer to the description of the method embodiments.
  • FIG. 10 is a schematic structural diagram of a P0N system according to an eighth embodiment of the present invention. As shown in FIG.
  • the P0N system in this embodiment may include: 0LT 90 and ONU 10, in this embodiment, 0LT 90 is 0NU.
  • the laser in 10 is wavelength aligned, and the 0LT 90 is connected to the ONU 10.
  • 0LT 90 and ONU 10 are specifically connected by MUX.
  • 0LT 90 used to indicate the phase region injection current of the 0NU 10 regulated laser within the adjustment range
  • the optical power spectrum of the laser is obtained, the optical power spectrum indicating the current 1 of the Bragg reflection region of the laser, and the optical power of the transmitted light; from the obtained optical power spectrum Determining the best optical power spectrum of the axis symmetry as the target optical power spectrum; determining the temperature of the Ip or gain region corresponding to the target optical power spectrum, and at least two I DBRs indicated by the peak points in the target optical power spectrum
  • the parameter is used as a parameter for adjusting the laser; the parameters of the adjustment laser are transmitted.
  • the 0LT 90 in this embodiment specifically performs the wavelength alignment method flow of the laser of the fifth embodiment, and the specific working principle thereof is not described again. For details, refer to the description of the method embodiment.
  • the 0LT90 connected to the 0LT 90, for adjusting the phase injection current I Phas6 or the temperature of the gain region of the laser according to the indication of the 0LT 90; and receiving the parameter of the adjustment laser sent by the 0LT 90, according to The parameters of the laser are adjusted for wavelength alignment. That is, the 0LT90 adjusts the parameters of the laser to the parameters of the received adjustment laser to achieve wavelength alignment.
  • the optical power spectrum of the laser is obtained, and then the optical power spectrum with the best axial symmetry is determined from the respective optical power spectra as the target light.
  • the power spectrum, the Ip or the temperature of the gain region corresponding to the determined target optical power spectrum, and the I indicated by the peak point in the target optical power spectrum, at least two parameters are used as parameters for adjusting the laser, thereby avoiding the use of laser parameters and outgoing light.
  • the mapping table of wavelengths determines the parameters of the laser and reduces the cost of the laser.

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Abstract

一种激光器(30,51,61)的波长对准方法和装置、ONU、OLT(90)和PON系统,通过在调节范围内,调节激光器(30,51,61)的I phase或者增益区的温度,测量获得激光器(30,51,61)的反射或透射光的光功率谱,然后从各光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱,将确定的目标光功率谱对应的I phase或者增益区的温度,以及目标光功率谱中峰值点所标示的I DBR至少两个参数作为调节激光器(30,51,61)的参数。从而避免利用激光器参数与出射光波长的映射关系表,确定调节激光器的参数,降低了激光器的成本。

Description

激光器的波长对准方法和装置、 0NU、 0LT和 PON系统 技术领域
本发明涉及通信技术,尤其涉及一种激光器的波长对准方法和装置、 0NU
0LT和 P0N系统。 背景技术
可调激光器是一种可以对出射光波长进行调节的激光器, 如分布式布拉 格反射 (distributed Bragg reflective , DBR ) 激光器, 可调激光器可设置 于无源光网络(Passive Optical Network, PON )系统中的光网络单元(Optical Network Unit , 0NU ) 中还可设置于光线路终端 ( Optical Line Terminal , 0LT ) 中。 DBR激光器包括用于出射光波的增益区, 沿增益区出光的反方向依 次设置有相移区和 DBR区。 当该激光器在光传输链路中与具有不同通道带宽 的波分多路复用器 (Multiplexer , MUX) 配合使用时, 通过对 DBR区注入电 流 (IDBR) 和相移区注入电流 (IPhasJ 这两个 DBR激光器参数的调节, 或者通 过对 DBR区注入电流和增益区温度这两个 DBR激光器参数的调节, 实现对激 光器出射光波长的调节,从而使得激光器出射光波长在 MUX通道带宽范围内, 也就是说实现激光器的波长对准。
现有技术中, 需要在生产激光器过程中, 建立激光器参数与出射光波长 的映射关系表, 从而在激光器的波长对准时, 依据该映射关系表确定所需的 出射光波长所对应的激光器参数。 但由于现有技术中, 必须预知所需波长, 然后才能够根据前述映射关系表进行激光器的波长对准,不仅操作过程繁琐, 还需要人工参与, 另外, 建立激光器参数与出射光波长的映射关系表的成本 较高, 从而提高了激光器的成本。 发明内容
本发明实施例提供一种激光器的波长对准方法和装置、 0NU、 0LT和 P0N 系统, 避免利用激光器参数与出射光波长的映射关系表, 确定调节 DBR激光 器的参数, 从而以降低 DBR激光器的成本。 第一方面提供一种激光器的波长对准方法, 包括: 在调节范围内, 调节 激光器的相位区注入电流 Ip 或者增益区的温度, 获得所述激光器的光功率 谱,所述光功率谱指示激光器的布拉格反射区的电流 IDBR与激光器的出射光的 光功率的对应关系; 所述出射光为所述激光器所出射的光信号通过一部分反 射镜和波分多路复用器 MUX, 到达第二部分反射镜, 由所述第二部分反射镜 反射并通过所述 MUX到达所述第一部分反射镜, 获得的反射光; 或者, 所述 出射光为所述激光器所出射的光信号通过所述 MUX, 获得的透射光; 从获得 的光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱; 将确定的目标 光功率谱对应的 Iphas6或者增益区的温度, 以及所述目标光功率谱中峰值点所 标示的 IDBR中至少两个参数作为调节激光器的参数。
在第一方面的第一种可能的实现方式中, 所述从所述获得的光功率谱中 确定轴对称性最佳的光功率谱为目标光功率谱, 包括: 计算每一个光功率谱
Figure imgf000003_0001
跳模点所标示的 IDBR, /m是所述光功率谱的峰值点所标示的 IDBR ; 所述第一跳 模点是沿 I,减小方向距离光功率谱的峰值点最近的跳模点;所述第二跳模点 是沿 I,增大方向距离光功率谱的峰值点最近的跳模点; 在各所述光功率谱 中, 将具有最小对称值的光功率谱作为对称性最佳的目标光功率谱。
结合第一方面和第一方面的第一种可能的实现方式, 在第一方面的第二 种可能的实现方式中,所述在调节范围内,调节激光器的相位区注入电流 I 或者增益区的温度, 获得所述激光器的光功率谱, 包括: 在调节范围内, 按 预设歩长调节 Ip 或者增益区的温度, 测量光功率谱; 针对每个测得的光功 率谱, 判断所述测得的光功率谱是否满足第一判断条件、 第二判断条件和第 三判断条件; 若所述测得的光功率谱满足第一判断条件、 第二判断条件和第 三判断条件, 则将所述测得的光功率谱作为所述获得的光功率谱; 若所述测 得的光功率谱不满足所述第一判断条件, 且已存在所述获得的光功率谱, 则 停止测量; 其中, 所述第一判断条件为光功率谱的峰值点所标示的反射光的 光功率大于第一阈值, 所述第一阈值是根据激光器的出光功率和反射光在光 传输链路中的光损耗确定的; 所述第二判断条件为第一跳模点和第二跳模点 之间的反射光的光功率差的绝对值小于第二阈值, 所述第二阈值是根据激光 器的出光功率、 反射光在光传输链路 MUX的隔离 所 述第三判断条件为光功率谱的对称值
Figure imgf000003_0002
为第一跳模点所标示的 : 2为第二跳模点所标示的: , 为峰值点 所标示的 IDBR, 所述第三阈值是根据激光器的出光功率、 IDBR的取值范围、 MUX 的通道带宽和 MUX的隔离度确定的。 结合第一方面的第一种可能的实现方式, 在第一方面的第三种可能的实 现方式中, 所述跳模点所标示的反射光的光功率大于至少一个与所述跳模点 相邻的相邻点所标示的反射光的光功率, 且与所述相邻点所标示的光功率之 差大于第四阈值; 所述第四阈值是根据所述激光器的出光功率和所述 MUX的 隔离度确定的。
结合第一方面、 第一方面的第一种可能的实现方式、 第一方面的第二种 可能的实现方式和第一方面的第三种可能的实现方式, 在第一方面的第四种 可能的实现方式中, 所述将确定的目标光功率谱对应的 IPh ^或者增益区的温 度,以及所述目标光功率谱中峰值点所标示的 I,中至少两个参数作为调节激 光器的参数之后, 还包括: 发送所述调节激光器的参数。
结合第一方面的第四种可能的实现方式, 在第一方面的第五种可能的实 现方式中, 所述发送所述调节激光器的参数包括: 发送物理层操作管理和维 护 PL0AM消息; 所述 PL0AM消息中的保留 Reserve字段或者所述 PL0AM消息 中的调整控制 Tuning Control字段携带所述调节激光器的参数。
第二方面提供一种激光器的波长对准装置, 包括: 获得模块, 用于调节 激光器的相位区注入电流 I 或者增益区的温度, 获得所述激光器的光功率 谱,所述光功率谱指示激光器的布拉格反射区的电流 IDBR与激光器的出射光的 光功率的对应关系; 所述出射光为所述激光器所出射的光信号, 通过一部分 反射镜和波分多路复用器 MUX, 到达第二部分反射镜, 由所述第二部分反射 镜反射并通过所述 MUX到达所述第一部分反射镜, 获得的反射光; 或者, 所 述出射光为所述激光器所出射的光信号, 通过所述 MUX, 获得的透射光; 确 定模块, 用于从获得的光功率谱中确定轴对称性最佳的光功率谱为目标光功 率谱; 参数模块,用于将确定的目标光功率谱对应的 I 或者增益区的温度, 以及所述目标光功率谱中峰值点所标示的 I,中至少两个参数作为调节激光 器的参数。
在第二方面的第一种可能的实现方式中, 所述确定模块, 包括: 计算单 元, 用于计算每一个光功率谱的对称值 + I 是第 模点所标示的 IDBR, /。皿是第二跳模点所标示的 IDBR, /m是所述光功率谱的峰 值点所标示的 iDBR; 所述第一跳模点是沿 I,减小方向距离光功率谱的峰值点 最近的跳模点;所述第二跳模点是沿 1 增大方向距离光功率谱的峰值点最近 的跳模点; 确定单元, 用于在各所述光功率谱中, 将具有最小对称值的光功 率谱作为对称性最佳的目标光功率谱。
结合第二方面和第二方面的第一种可能的实现方式, 在第二方面的第二 种可能的实现方式中, 所述获得模块, 具体用于在调节范围内, 按预设歩长 调节 Ip 或者增益区的温度, 测量光功率谱; 针对每一个测得的光功率谱, 判断所述测得的光功率谱是否满足第一判断条件、 第二判断条件和第三判断 条件; 若所述测得的光功率谱满足第一判断条件、 第二判断条件和第三判断 条件, 则将所述测得的光功率谱作为所述获得的光功率谱; 若所述测得的光 功率谱不满足所述第一判断条件, 且已存在所述获得的光功率谱, 则停止测 量; 其中, 所述第一判断条件为光功率谱的峰值点所标示的出射光的光功率 大于第一阈值, 所述第一阈值是根据激光器的出光功率和出射光在光传输链 路中的光损耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的 出射光的光功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出 光功率、 出射光在光传输链路 所述 三
Figure imgf000005_0001
的 IDBR, 所述第三阈值是根据激光器的出光功率、 IDBR的取值范围、 MUX的通道 带宽和 MUX的隔离度确定的。
结合第二方面的第一种可能的实现方式, 在第二方面的第三种可能的实 现方式中, 所述计算单元, 具体用于计算每一个光功率谱的对称值 + I ; 其中, / 1是第一跳模点所标示的 IDBR, / 2是第二跳模点所 标示的 IDBR, /m是所述光功率谱的峰值点所标示的 IDBR ; 所述第一跳模点是沿 I,减小方向距离光功率谱的峰值点最近的跳模点; 所述第二跳模点是沿 IDBR 增大方向距离光功率谱的峰值点最近的跳模点; 所述跳模点所标示的出射光 的光功率大于至少一个与所述跳模点相邻的相邻点所标示的出射光的光功 率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是根 据所述激光器的出光功率和所述 MUX的隔离度确定的。
结合第二方面、 第二方面的第一种可能的实现方式、 第二方面的第二种 可能的实现方式和第二方面的第三种可能的实现方式, 在第二方面的第四种 可能的实现方式中, 所述装置, 还包括:
发送模块, 用于发送所述调节激光器的参数。
在第二方面的第五种可能的实现方式中, 所述发送模块, 具体用于发送 物理层操作管理和维护 PL0AM消息; 所述 PL0AM消息中的保留 Reserve字段 或者所述 PL0AM消息中的调整控制 Tuning Control字段携带所述调节激光器 的参数。 第三方面提供一种光网络单元 0NU, 包括: 激光器、 第一部分反射镜、 第二部分反射镜、 波分多路复用器 MUX和光敏二极管 PD, 所述激光器通过所 述第一部分反射镜、所述 MUX和所述第二部分反射镜连接, 所述 PD与所述第 一部分反射镜连接; 所述 0NU, 还包括: 处理器, 与所述 PD和所述激光器连 接; 所述激光器, 用于根据所述处理器的指示, 在调节范围内, 出射光信号; 所述 PD, 用于检测由所述激光器出射的光信号通过所述第一部分反射镜和所 述 MUX, 到达第二部分反射镜, 由所述第二部分反射镜反射并通过所述 MUX 到达所述第一部分反射镜的反射光, 得到所述反射光的光功率, 向所述处理 器发送所述反射光的光功率; 所述处理器, 用于指示所述激光器在调节范围 内, 调节所述激光器的相位区注入电流 I 或者增益区的温度, 获得所述激 光器的光功率谱,所述光功率谱指示激光器的布拉格反射区的电流 I,与所述 PD检测获得的反射光的光功率的对应关系; 从获得的光功率谱中确定轴对称 性最佳的光功率谱为目标光功率谱; 将确定的目标光功率谱对应的 Ip 或者 增益区的温度,以及所述目标光功率谱中峰值点所标示的 I,中至少两个参数 作为调节激光器的参数。
在第三个方面的第一种可能的实现方式中, 所述处理器从所述获得的光 功率谱中确定轴对称性最佳的光功率谱为目标光功率谱, 具体包括: 所述处 理器计算每一个光功率谱的对称值 + I 是第一跳模点
2
所标示的 IDBR 2是第二跳模点所标示的 IDBR, /m是所述光功率谱的峰值点 所标示的 iDBR ; 所述第一跳模点是沿 1,减小方向距离光功率谱的峰值点最近 的跳模点;所述第二跳模点是沿 IDBR增大方向距离光功率谱的峰值点最近的跳 模点; 所述处理器在各所述光功率谱中, 将具有最小对称值的光功率谱作为 对称性最佳的目标光功率谱。
结合第三方面和第三方面的第一种可能的实现方式, 在第三方面的第二 种可能的实现方式中, 所述处理器指示所述激光器在调节范围内, 调节所述 激光器的相位区注入电流 Ip 或者增益区的温度, 获得所述激光器的光功率 谱, 具体包括: 所述处理器指示所述激光器在调节范围内, 按预设歩长调节
Ip 或者增益区的温度, 以及指示所述 PD测量所述反射光的光功率, 测得光 功率谱; 所述处理器针对每一个测得的光功率谱, 判断所述测得的光功率谱 是否满足第一判断条件、 第二判断条件和第三判断条件; 若所述测得的光功 率谱满足第一判断条件、 第二判断条件和第三判断条件, 则将所述测得的光 功率谱作为所述获得的光功率谱; 若所述测得的光功率谱不满足所述第一判 断条件, 且已存在所述获得的光功率谱, 则停止测量; 其中, 所述第一判断 阈值是根据激光器的出光功率和反射光在光传输链路中的光损耗确定的; 所 述第二判断条件为第一跳模点和第二跳模点之间的反射光的光功率差的绝对 值小于第二阈值, 所述第二阈值是根据激光器的出光功率、 反射光在光传输 链路中的光损耗和 MUX的隔离度确定的; 所述第三判断条件为光功率谱的对
Figure imgf000007_0001
为第二跳模点所标示的 IDBR, /m为峰值点所标示的 IDBR, 所述第三阈值是根据 激光器的出光功率、 I,的取值范围、 MUX的通道带宽和 MUX的隔离度确定的。
结合第三方面的第一种可能的实现方式, 在第三方面的第三种可能的实 现方式中, 所述跳模点所标示的反射光的光功率大于至少一个与所述跳模点 相邻的相邻点所标示的反射光的光功率, 且与所述相邻点所标示的光功率之 差大于第四阈值; 所述第四阈值是根据所述激光器的出光功率和所述 MUX的 隔离度确定的。
结合第三方面、 第三方面的第一种可能的实现方式、 第三方面的第二种 可能的实现方式和第三方面的第三种可能的实现方式, 在第三方面的第四种 可能的实现方式中, 所述 0NU, 还包括: 驱动电路; 所述驱动电路, 与所述 处理器和所述激光器连接, 用于根据所述处理器的指示, 在调节范围内, 调 节所述激光器的相位区注入电流 Ip 或者增益区的温度; 所述激光器, 在所 述驱动电路的驱动下, 出射光信号。
第四方面提供一种光线路终端 0LT, 包括: 激光器、 第一部分反射镜、 第二部分反射镜、 波分多路复用器 MUX和光敏二极管 PD, 所述激光器通过所 述第一部分反射镜、所述 MUX和所述第二部分反射镜连接, 所述 PD与所述第 一部分反射镜连接; 所述 0LT, 还包括: 处理器, 与所述 PD和所述激光器连 接; 所述激光器, 用于根据所述处理器的指示, 在调节范围内, 出射光信号; 所述 PD, 用于检测由所述激光器出射的光信号通过所述第一部分反射镜和所 述 MUX, 到达第二部分反射镜, 由所述第二部分反射镜反射并通过所述 MUX 到达所述第一部分反射镜的反射光, 得到所述反射光的光功率, 向所述处理 器发送所述反射光的光功率; 所述处理器, 用于指示所述激光器在调节范围 内, 调节所述激光器的相位区注入电流 I 或者增益区的温度, 获得所述激 光器的光功率谱,所述光功率谱指示激光器的布拉格反射区的电流 I,与所述 PD检测获得的反射光的光功率的对应关系; 从获得的光功率谱中确定轴对称 性最佳的光功率谱为目标光功率谱; 将确定的目标光功率谱对应的 IP 或者 增益区的温度,以及所述目标光功率谱中峰值点所标示的 I,中至少两 作为调节激光器的参数。
在第四方面的第一种可能的实现方式中, 所述处理器从所述获得的光功 率谱中确定轴对称性最佳的光功率谱为目标光功率谱, 具体包括: 所述处理 器计算每一个光功率谱的对称值 + I 跳模点所
2
标示的 IDBR, /。皿是第二跳模点所标示的 IDBR, /m是所述光功率谱的峰值点所 标示的 IDBR; 所述第一跳模点是沿 IDBR减小方向距离光功率谱的峰值点最近的 跳模点;所述第二跳模点是沿 1,增大方向距离光功率谱的峰值点最近的跳模 点; 所述处理器在各所述光功率谱中, 将具有最小对称值的光功率谱作为对 称性最佳的目标光功率谱。
结合第四方面和第四方面的第一种可能的实现方式, 在第四方面的第二 种可能的实现方式中, 所述处理器指示所述激光器在调节范围内, 调节所述 激光器的相位区注入电流 Ip 或者增益区的温度, 获得所述激光器的光功率 谱, 具体包括: 所述处理器指示所述激光器在调节范围内, 按预设歩长调节 Iphas6或者增益区的温度, 以及指示所述 PD测量所述反射光的光功率, 测得光 功率谱; 所述处理器针对每一个测得的光功率谱, 判断所述测得的光功率谱 是否满足第一判断条件、 第二判断条件和第三判断条件; 若所述测得的光功 率谱满足第一判断条件、 第二判断条件和第三判断条件, 则将所述测得的光 功率谱作为所述获得的光功率谱; 若所述测得的光功率谱不满足所述第一判 断条件, 且已存在所述获得的光功率谱, 则停止测量; 其中, 所述第一判断 条件为光功率谱的峰值点所标示的反射光的光功率大于第一阈值, 所述第一 阈值是根据激光器的出光功率和反射光在光传输链路中的光损耗确定的; 所 述第二判断条件为第一跳模点和第二跳模点之间的反射光的光功率差的绝对 值小于第二阈值, 所述第二阈值是根据激光器的出光功率、 反射光在光传输 链路中的光损耗和 MUX的隔离度确定的; 所述第三判断条件为光功率谱的对 称值 + I
I小于第三阈值,其中 ,为第一跳模点所标示的 IDBR 1
2
为第二跳模点所标示的 IDBR, /m为峰值点所标示的 IDBR, 所述第三阈值是根据 激光器的出光功率、 I,的取值范围、 MUX的通道带宽和 MUX的隔离度确定的。
结合第四方面的第一种可能的实现方式, 在第四方面的第三种可能的实 现方式种, 所述跳模点所标示的反射光的光功率大于至少一个与所述跳模点 相邻的相邻点所标示的反射光的光功率, 且与所述相邻点所标示的光功率之 差大于第四阈值; 所述第四阈值是根据所述激光器的出光功率和所述 MUX的 隔离度确定的
结合第四方面、 第四方面的第一种可能的实现方式、 第四方面 可能的实现方式和第四方面的第三种可能的实现方式, 在第四方面的第四种 可能的实现方式中, 所述 0LT, 还包括: 驱动电路; 所述驱动电路, 与所述 处理器和所述激光器连接, 用于根据所述处理器的指示, 在调节范围内, 调 节所述激光器的相位区注入电流 Ip 或者增益区的温度; 所述激光器, 在所 述驱动电路的驱动下, 出射光信号。
第五方面提供一种光线路终端 0LT,包括:波分多路复用器 MUX、接收机、 发送机和处理器; 所述处理器分别与所述接收机和所述发送机连接; 所述接 收机, 用于检测由激光器所出射的光信号通过所述 MUX的透射光, 获得所述 透射光的光功率; 所述处理器, 用于在调节范围内, 指示所述激光器调节相 位区注入电流 IPhas6或者增益区的温度, 获得所述激光器的光功率谱, 所述光 功率谱指示激光器的布拉格反射区的电流 I,与所述接收机获得的透射光的 光功率的对应关系; 从获得的光功率谱中确定轴对称性最佳的光功率谱为目 标光功率谱; 将确定的目标光功率谱对应的 I 或者增益区的温度, 以及所 述目标光功率谱中峰值点所标示的 I,至少两个参数作为调节激光器的参数; 所述发送机, 用于发送所述调节激光器的参数。
在第五方面的第一种可能的实现方式中, 所述处理器从获得的光功率谱 中确定轴对称性最佳的光功率谱为目标光功率谱, 具体包括: 所述处理器计
Figure imgf000009_0001
的 IDBR, / 2是第二跳模点所标示的 IDBR, ^是所述光功率谱的峰值点所标 /」、 的 iDBR; 所述第一跳模点是沿 1,减小方向距离光功率谱的峰值点最近的跳模 点; 所述第二跳模点是沿 IDBR增大方向距离光功率谱的峰值点最近的跳模点; 所述处理器在各所述光功率谱中, 将具有最小对称值的光功率谱作为对称性 最佳的目标光功率谱。
结合第五方面和第五方面的第一种可能的实现方式, 在第五方面的第二 种可能的实现方式中, 所述处理器在调节范围内, 指示激光器调节相位区注 入电流 Ip 或者增益区的温度, 获得所述激光器的光功率谱, 具体包括: 所 述处理器在调节范围内, 指示所述激光器按预设歩长调节 Ip 或者增益区的 温度, 测量光功率谱; 所述处理器针对每一个测得的光功率谱, 判断所述测 得的光功率谱是否满足第一判断条件、 第二判断条件和第三判断条件; 若测 得的光功率谱满足所述第一判断条件、 所述第二判断条件和所述第三判断条 件, 则保存测得的光功率谱; 若所述测得的光功率谱不满足所述第一判断条 件, 且已存在所述获得的光功率谱, 则停止测量; 其中, 所述第一判断条件 为光功率谱的峰值点所标示的透射光的光功率大于第一阈值, 所述第一阈值 二判断条件为第一跳模点和第二跳模点之间的透射光的光功率差的绝对值小 于第二阈值, 所述第二阈值是根据激光器的出光功率、 透射光在光传输链路 中的光损耗和 MUX的隔离度确定的; 所述第三判断条件为光功率谱的对称值
T + I 小于第三阈值, 其中, /。 为第一跳模点所标示的 IDBR, 1 为
2
第二跳模点所标示的 IDBR, /m为峰值点所标示的 IDBR, 所述第三阈值是根据激 光器的出光功率、 IDBR的取值范围、 MUX的通道带宽和 MUX的隔离度确定的。
结合第五方面的第一种可能的实现方式, 在第五方面的第三种可能的实 现方式中, 所述跳模点所标示的反射光的光功率大于至少一个与所述跳模点 相邻的相邻点所标示的反射光的光功率, 且与所述相邻点所标示的光功率之 差大于第四阈值; 所述第四阈值是根据所述激光器的出光功率和所述 MUX的 隔离度确定的。
结合第五方面、 第五方面的第一种可能的实现方式、 第五方面的第二种 可能的实现方式和第五方面的第三种可能的实现方式, 在第五方面的第四种 可能的实现方式中, 所述发送机发送所述调节激光器的参数, 具体包括: 所 述发送机发送物理层操作管理和维护 PL0AM消息; 所述 PL0AM消息中的保留 Reserve字段或者所述 PL0AM消息中的调整控制器 Tuning Control字段携带 所述调节激光器的参数。
第六方面是提供一种无源光网络 P0N系统, 包括如第五方面所述的光线 路终端 0LT, 以及光网络单元 0NU; 所述 0LT与所述 0NU连接; 所述 0NU, 用 于根据所述 0LT的指示, 调节激光器的相位区注入电流 IPha 或者增益区的温 度; 以及接收所述 0LT发送的所述调节激光器的参数, 根据所述调节激光器 的参数进行波长对准。
本发明实施例提供的激光器的波长对准方法和装置、 0NU、 0LT和 PON系 统, 通过在调节范围内, 调节激光器的 IPhas6或者增益区的温度,
Figure imgf000010_0001
光器的光功率谱, 然后从各光功率谱中确定轴对称性最佳的光功率谱为目标 光功率谱, 将确定的目标光功率谱对应的 IP 或者增益区的温度, 以及目标 光功率谱中峰值点所标示的 IDBR至少两个参数作为调节激光器的参数,从而避 免利用激光器参数与出射光波长的映射关系表, 确定调节激光器的参数, 降 低了激光器的成本。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见 地, 下面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员 来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的 附图。
图 1为 DBR激光器的结构示意图;
图 2为本发明第一个实施例提供的一种激光器的波长对准方法的流程示 意图;
图 3为反射光的光路图;
图 4为本发明第二个实施例提供的一种激光器的波长对准装置的结构示 意图;
图 5为本发明第三个实施例提供的一种 0NU的结构示意图;
图 6为本发明第四个实施例提供的 0LT的结构示意图;
图 7 为本发明第五个实施例提供的一种激光器的波长对准方法的流程 示意图;
图 8 为本发明第六个实施例提供的一种激光器的波长对准装置的结构 示意图;
图 9为本发明第七个实施例提供的一种 0LT 90的结构示意图; 图 10为本发明第八个实施例提供的 P0N系统的结构示意图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述, 显然,所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
DBR激光器是一种可调谐激光器, 包括用于出射光波的增益区, 沿增益 区出光的反方向依次设置有相移区和 DBR区, 图 1为 DBR激光器的结构示意 图, 如图 1所示, 包括: 增益区、 相移区和 DBR区, 其中, DBR区包括 DBR 光栅, 用于对经过相移区相移后的光波进行 DBR反射。 DBR激光器不仅可以 利用 IPh ^和 I,这两个参数调节 DBR激光器出射光的波长; 在实现过程中为 了简便,还可利用调节增益区的温度和 1 这两个参数调节 DBR激光器出射光 的波长, 从而进行波长对准, 也就是说使得激光器的出射光的波长与 MUX的 通带相匹配。 以下各实施例中所提及的激光器均可以为 DBR激光器。
以下各实施例中所提及的光功率谱均用于指示激光器的 I,与激光器的 出射光的光功率的对应关系。
具体的, 该出射光可为激光器所出射的光信号通过一部分反射镜和 MUX, 到达第二部分反射镜, 由第二部分反射镜反射并通过 MUX到达第一部分反射 镜, 获得的反射光; 应用实施例可参见下述第一个实施例、 第二个实施例、 第三个实施例和第四个实施例。
或者, 具体的, 该出射光可为激光器所出射的光信号通过 MUX, 获得的 透射光; 应用实施例参见下述第五个实施例、 第六个实施例、 第七个实施例 和第八个实施例。
图 2为本发明第一个实施例提供的一种激光器的波长对准方法的流程示 意图, 本实施例中的方法可以由 0NU实施, 以对 0NU中的激光器进行波长对 准, 也可以由 0LT实施, 以对 0LT中的激光器进行波长对准, 如图 2所示, 本实施例可以包括:
201、在调节范围内, 调节激光器的 IPha∞或者增益区的温度, 获得激光器 的光功率谱。
其中,光功率谱建立在二维直角坐标系中,横轴标示 DBR区注入电流 IDBR, 纵轴标示反射光的光功率,用于指示横轴所标示的 DBR区注入电流 IDBR与纵轴 所标示的反射光的光功率之间的对应关系。 其中, 反射光, 是所述 DBR激光 器的出射光中透过 MUX的部分, 经过部分反射镜反射获得的, 具体的, 图 3 为反射光的光路图, 如图 3所示, 激光器 30通过第一部分反射镜 31、 MUX 33 和第二部分反射镜 32连接, 光敏二极管 (Photodiode, PD ) 34与第一部分 反射镜 31连接, 激光器 30的出射光通过第一部分反射镜 31和 MUX 33, 到 达第二部分反射镜 32, 由第二部分反射镜 32反射并通过 MUX 33到达第一部 分反射镜 31, 由 PD 34检测获得反射光。 第一部分反射镜 31可以为偏振分 束器 (PBS, Polarization Beam Splitter ) 或者分光片等; 第二部分反射镜 32可以为法拉第旋转反射镜 (F體, Faraday Rotation Mirror ) 等; MUX可 以为阵列波导光栅 (Array Wave Grat ing , AWG ) 。
可选的, 在激光器的 Ip 或者增益区的温度的可调范围内, 对 Ip 或者 增益区的温度采用逐渐增大或者逐渐减小的方式, 按照预设歩长进行调节, 测量获得每一个 Ip 或者增益区的温度对应的光功率谱。
或者, 可选的, 重复执行列歩骤 A和歩骤 B , 直至测得的光功率谱不满 足所述第一判断条件, 且已存在所述获得的光功率谱, 则停止测量:
歩骤 A、 在调节范围内, 对 Ip 或者增益区的温度采用逐渐增大或者逐 渐减小的方式, 按照预设歩长进行调节, 测量当前 Ip 或者增益区的温度对 应的光功率谱;
歩骤 B、 判断所述测得的光功率谱是否满足第一判断条件、 第二判断条 件和第三判断条件; 若所述测得的光功率谱满足第一判断条件、 第二判断条 件和第三判断条件, 则将所述测得的光功率谱作为所述获得的光功率谱。
其中, 所述第一判断条件为光功率谱的峰值点所标示的反射光的光功率 大于第一阈值, 所述第一阈值是根据激光器的出光功率和反射光在光传输链 路中的光损耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的 反射光的光功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出 光功率、 反射光在光传输链路 所述 三 判断条件为光功率谱的对称值
Figure imgf000013_0001
一跳模点所标示的 iDBR, / 2为第二跳模点所标示的 iDBR, /m为峰值点所标小 的 IDBR, 所述第三阈值是根据激光器的出光功率、 IDBR的取值范围、 MUX的通道 带宽和 MUX的隔离度确定的。 在获得光功率谱的过程中利用第一判断条件、 第二判断条件和第三判断条件对光功率谱进行筛选, 当以筛选到满足上述三 个条件的光功率谱时且当前测试获得的光功率谱时, 停止测试, 从而加快获 得光功率谱的进度。
202、 从各光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱。 可选的, 根据各所述光功率谱中位于第一跳模点和第二跳模点之间的功 率谱段相对于经过峰值点的纵轴的轴对称性, 确定对称性最佳的目标光功率 谱。其中,第一跳模点是沿 I。BR减小方向距离所述光功率谱的峰值点最近的跳 模点; 所述第二跳模点是沿 IDBR增大方向距离所述峰值点最近的跳模点。跳模 点满足其所标示的反射光的光功率大于至少一个与所述跳模点相邻的相邻点 所标示的反射光的光功率, 且与所述相邻点所标示的光功率之差大于第四阈 值, 其中, 第四阈值是根据所述 DBR激光器的出光功率和 MUX的隔离度确定 的, 如: 取第四阈值为 8dB。 三段式 DBR激光器的主模与边模之间的间隔一 般超过 MUX的通道带宽, 当主模位于 MUX通道带宽附近时, 边模会落在通道 带宽之外, 此时如发生跳模, 则边模透过率很低, 可检测到明显的光功率突 变, 一般为数十 dB变化, 因此可以很明显的检测到第一跳模点 、 第二跳模 点 02的位置, 两个跳模点之间的中心点 0 —般为边模抑制比 (Side Mode Suppression Ratio, SMSR) 最大的地方。 具体的, 根据计算获得的各光功率
Figure imgf000014_0001
+ I 在各所述光功率谱中, 将具有最小对称值的光功 率谱作为对称性最佳的目标光功率谱。其中, /。 是第一跳模点所标示的 IDBR
/。皿是第二跳模点所标示的 iDBR, /m是峰值点所标示的 iDBR。 采用该方式确定 跳模点可使得波长对准后的激光器具有较高的 SMSR。
203、将确定的目标光功率谱对应的 IPha∞或者增益区的温度, 以及所述目 标光功率谱中峰值点所标示的 IDBR至少两个参数作为调节激光器的参数。
具体的,将测得所述目标光功率谱时所述激光器的 iPh ^或者增益区温度, 以及所述目标光功率谱中峰值点所标示的 IDBR作为调节激光器的参数,以实现 激光器的波长对准。
进一歩, 在 203之后, 还可对波长对准后的激光器进行发射眼图消光比 调整。 具体的, 要使得激光器正常工作, 还需要对其发射眼图消光比 (Extinction Ratio , ER) 在线调整, 例如: 具有消光比监控与调整功能的 激光器驱动器 (LDD, LD Driver) , 给定 ER值后, LDD即可将 ER调整为设 定值。 或者, 又例如: 激光器完成在线波长对准后, 以一定频率发送指示一 串 " 1 "和 "0 "信号的出射光, 同时监控经法拉第旋转反射镜反射回来的分 别指示 " 1 "和 "0" 的出射光的光功率 和 P。, 则 El^lOlg d/Pa) (dB) , 即 可通过改变 DBR激光器的调制和偏置电流, 调整 ER。 以一定频率发送一串的 " 1 "和 "0" , 是为了更精确测得 ER。
进一歩, 在 201之前, 还可包括: 对激光器进行出厂检测。 具体的, 若 激光器的增益区的温度取值范围为 , Τ2) , 一般 0<12-1\< 10, IphasE取值 范围为 (IP1, IP2) , IDBR取值范围为 (ID1, ID2) , 其中, T\<T2, IP1< IP2, ID1 < ID2, 则在所述激光器的增益区的温度为 T2, 1^为 ID1的条件下, 通过对 I 进行调节, 获得满足激光器的出射光的边模抑制比大于第五阈值的第一出射 光, 如: 取第五阈值为 35dB; 在所述激光器的工作温度为 T2, 1,为 ID2的条 件下, 通过对 Iphas6进行调节, 获得满足激光器的出射光的边模抑制比大于所 述第五阈值的第二出射光; 计算获得所述激光器的出光功率为 ^ minWA) ; 其中, ^为所述第一出射光的光功率, P,为所述第二出射光的光功率; 所述 激光器的出光功率用于确定所述第一阈值、 所述第二阈值和所述第三阈值。 然后, 在所述激光器的工作温度为 T\, IDBR为 ID1的条件下, 通过对 I 进行 调节, 获得满足激光器的出射光的边模抑制比大于所述第五阈值的第三出射 光; 在所述激光器的工作温度为 T\, 1,为 ID2的条件下, 通过对 I 进行调 节, 改变所述激光器的出射光的波长, 获得满足激光器的出射光的边模抑制 比大于所述第五阈值的第四出射光; 根据公式 = 1^x^4 ), 进行计算, 其中, = |^ -^|对应波长可调范围 ( , λ2 ) , Δ^ = 3 -Α4|对应波长可调 范围 (^, 4 ) , 将 Δ 所对应的波长可调范围作为所述激光器的出射光的波 长可调范围; ^为所述第一出射光的波长, 2为所述第二出射光的波长, Α为 所述第三出射光的波长, A为所述第四出射光的波长; 确定所述激光器的出 射光的波长可调范围覆盖所述 MUX的通道带宽。 由于在出厂检测过程中, 仅 需要对 DBR激光器的出光功率、 DBR激光器的出射光的波长可调范围, 以及 增益区温度取值范围、 IPhas6取值范围和 1^取值范围等进行检测, 无需测试获 得 DBR激光器参数与出射光波长的映射关系表, 从而减少了 DBR激光器出厂 测试时间, 降低了 DBR激光器的成本。
需要说明的是, 在将激光器与 MUX配合使用之前, 应当确定所述激光器 的出射光的波长可调范围能够覆盖所述 MUX中全部通道的通道带宽, 也就是 说, 确定激光器与 MUX匹配。
本发明实施例提供的激光器的波长对准方法, 通过在调节范围内, 调节 激光器的 IP 或者增益区的温度, 测量获得激光器的光功率谱, 然后从各光 功率谱中确定轴对称性最佳的光功率谱为目标光功率谱, 将确定的目标光功 率谱对应的 Ip 或者增益区的温度,以及目标光功率谱中峰值点所标示的 IDBR 至少两个参数作为调节激光器的参数, 从而避免利用激光器参数与出射光波 长的映射关系表, 确定调节激光器的参数, 降低了激光器的成本。 图 4为本发明第二个实施例提供的一种激光器的波长对准装置的结构示 意图, 本实施例所提供的波长对准装置可设置于 0LT中, 对 0LT中的激光器 进行波长对准, 还可设置于 0NU中, 对 0NU中的激光器进行波长对准, 本实 施例中的激光器的波长对准装置, 包括: 获得模块 41, 确定模块 42和参数 模块 43。 获得模块 41, 用于在调节范围内, 调节激光器的相位区注入电流 IPh ^或 者增益区的温度, 获得所述激光器的光功率谱。
其中,光功率谱指示激光器的布拉格反射区的电流 I,与激光器的反射光 的光功率的对应关系; 所述反射光是由所述激光器的出射光通过所述第一部 分反射镜和所述 MUX, 到达所述第二部分反射镜, 由所述第二部分反射镜反 射并通过所述 MUX到达所述第一部分反射镜, 由所述 PD检测获得的。
可选的, 获得模块 41, 具体用于在调节范围内, 按预设歩长调节 I 或 者增益区的温度, 测量光功率谱; 针对每一个测得的光功率谱, 判断所述测 得的光功率谱是否满足第一判断条件、 第二判断条件和第三判断条件; 若所 述测得的光功率谱满足第一判断条件、 第二判断条件和第三判断条件, 则将 所述测得的光功率谱作为所述获得的光功率谱; 若所述测得的光功率谱不满 足所述第一判断条件, 且已存在所述获得的光功率谱, 则停止测量; 其中, 所述第一判断条件为光功率谱的峰值点所标示的反射光的光功率大于第一阈 值, 所述第一阈值是根据激光器的出光功率和反射光在光传输链路中的光损 耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的反射光的光 功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出光功率、 反 射光在光传输链路中的光损耗和 MUX的隔离度确定的; 所述第三判断条件为 跳模点所
Figure imgf000016_0001
标示的 IDBR 2为第二跳模点所标示的 iDBR, /m为峰值点所标示的 IDBR, 所述 第三阈值是根据激光器的出光功率、 I,的取值范围、 MUX的通道带宽和 MUX 的隔离度确定的。
确定模块 42, 与获得模块 41连接, 用于从获得的光功率谱中确定轴对 称性最佳的光功率谱为目标光功率谱。
可选的, 确定模块, 可以包括: 计算单元, 用于计算每一个光功率谱的 是第
Figure imgf000016_0002
模点所标示的 iDBR, /m是所述光功率谱的峰值点所标示的 iDBR; 所述第一跳模 点是沿 IDBR减小方向距离光功率谱的峰值点最近的跳模点;所述第二跳模点是 沿 I,增大方向距离光功率谱的峰值点最近的跳模点; 确定单元,用于在各所 述光功率谱中, 将具有最小对称值的光功率谱作为对称性最佳的目标光功率 谱。 其中, 跳模点所标示的反射光的光功率大于至少一个与所述跳模点相邻 的相邻点所标示的反射光的光功率, 且与所述相邻点所标示的光功率之差大 于第四阈值; 所述第四阈值是根据所述激光器的出光功率和所述 MUX的隔离 度确定的。
参数模块 43, 与确定模块 42连接, 用于将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及所述目标光功率谱中峰值点所标示的 I,中至少 两个参数作为调节激光器的参数。
本实施例提供的激光器的波长对准装置的各功能模块用于执行第一实 施例所示的激光器的波长对准方法, 其具体工作原理不再赘述, 详见方法 实施例的描述。
本实施例中,通过在调节范围内,调节激光器的 Ip 或者增益区的温度, 测量获得激光器的光功率谱, 然后从各光功率谱中确定轴对称性最佳的光功 率谱为目标光功率谱,将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及目标光功率谱中峰值点所标示的 I,至少两个参数作为调节激光器的参 数, 从而避免利用激光器参数与出射光波长的映射关系表, 确定调节激光器 的参数, 降低了激光器的成本。 图 5为本发明第三个实施例提供的一种 0NU的结构示意图, 包括: 激光 器 51、 第一部分反射镜 52、 第二部分反射镜 53、 MUX 54和 PD 55 , 0NU还 包括处理器 56。
激光器 51通过所述第一部分反射镜 52、 所述 MUX 54和所述第二部分反 射镜 53连接, 所述 PD 55与所述第一部分反射镜 52连接, 处理器 56与所述 PD 55和所述激光器 51连接。 其中, 处理器 56与 PD 55和所述激光器 51 之间的连接为电连接; 激光器 51通过所述第一部分反射镜 52、 所述 MUX 54 和所述第二部分反射镜 53之间的连接, 以及所述 PD 55与所述第一部分反射 镜 52之间的连接为光连接, 如图 5中, 实线为电连接, 实箭头线为光连接, 箭头方向为光传播方向。
所述激光器 51, 用于根据所述处理器 56 的指示, 在调节范围内, 出射 光信号。
所述 PD 55 , 用于检测由所述激光器 51出射, 通过所述第一部分反射镜
52和所述 MUX 54, 到达第二部分反射镜 53, 由所述第二部分反射镜 53反射 并通过所述 MUX 54到达所述第一部分反射镜 52的反射光, 得到所述反射光 的光功率。
所述处理器 56,用于指示所述激光器 51在调节范围内, 调节所述激光器 的相位区注入电流 Ip 或者增益区的温度, 获得所述激光器的光功率谱, 所 述光功率谱指示激光器的布拉格反射区的电流 I,与所述 PD检测获得的反射 光的光功率的对应关系; 从获得的光功率谱中确定轴对称性最佳的光功率谱 为目标光功率谱; 将确定的目标光功率谱对应的 I 或者增益区的温度, 以 标光功率谱中峰值点所标示的 IDBR中至少两个参数作为调节激光器
Figure imgf000018_0001
进一歩, 处理器 56 指示所述激光器在调节范围内, 调节所述激光器的 相位区注入电流 IPhas6或者增益区的温度, 获得所述激光器的光功率谱, 具体 包括: 所述处理器 56 指示所述激光器在调节范围内, 按预设歩长调节 Ip 或者增益区的温度, 以及指示所述 PD测量所述反射光的光功率, 测得光功率 谱; 所述处理器 56针对每一个测得的光功率谱, 判断所述测得的光功率谱是 否满足第一判断条件、 第二判断条件和第三判断条件; 若所述测得的光功率 谱满足第一判断条件、 第二判断条件和第三判断条件, 则将所述测得的光功 率谱作为所述获得的光功率谱; 若所述测得的光功率谱不满足所述第一判断 条件, 且已存在所述获得的光功率谱, 则停止测量; 其中, 所述第一判断条 件为光功率谱的峰值点所标示的反射光的光功率大于第一阈值, 所述第一阈 值是根据激光器的出光功率和反射光在光传输链路中的光损耗确定的; 所述 第二判断条件为第一跳模点和第二跳模点之间的反射光的光功率差的绝对值 小于第二阈值, 所述第二阈值是根据激光器的出光功率、 反射光在光传输链 路中的光损耗和 MUX的隔离度确定的; 所述第三判断条件为光功率谱的对称 值
Figure imgf000018_0002
为第二跳模点所标示的 IDBR, /m为峰值点所标示的 IDBR, 所述第三阈值是根据 激光器的出光功率、 I,的取值范围、 MUX的通道带宽和 MUX的隔离度确定的。
进一歩,处理器 56从所述获得的光功率谱中确定轴对称性最佳的光功率 谱为目标光功率谱, 具体包括: 所述处理器 56计算每一个光功率谱的对称值 跳模点所
Figure imgf000018_0003
标示的 IDBR, /m是所述光功率谱的峰值点所标示的 IDBR; 所述第一跳模点是沿 I,减小方向距离光功率谱的峰值点最近的跳模点; 所述第二跳模点是沿 IDBR 增大方向距离光功率谱的峰值点最近的跳模点;所述处理器 56在各所述光功 率谱中, 将具有最小对称值的光功率谱作为对称性最佳的目标光功率谱。 跳 模点所标示的反射光的光功率大于至少一个与所述跳模点相邻的相邻点所标 示的反射光的光功率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是根据所述激光器的出光功率和所述 MUX的隔离度确定的。
进一歩, 0NU, 还可以包括驱动电路, 该驱动电路与所述处理器 56和所 述激光器 51连接, 用于根据所述处理器 56的指示, 在调节范围内, 调节所 述激光器 51的相位区注入电流 IPhas6或者增益区的温度。 本实施例提供的 0NU的各功能模块可用于执行第一个实施例所示的激 光器的波长对准方法, 其具体工作原理不再赘述, 详见方法实施例的描述。
本实施例中,通过在调节范围内,调节激光器的 Ip 或者增益区的温度, 测量获得激光器的光功率谱, 然后从各光功率谱中确定轴对称性最佳的光功 率谱为目标光功率谱,将确定的目标光功率谱对应的 IP 或者增益区的温度, 以及目标光功率谱中峰值点所标示的 IDBR至少两个参数作为调节激光器的参 数, 从而避免利用激光器参数与出射光波长的映射关系表, 确定调节激光器 的参数, 降低了激光器的成本。 图 6为本发明第四个实施例提供的 0LT的结构示意图, 如图 6所示, 本 实施例中的 0LT,包括:激光器 61、第一部分反射镜 62、第二部分反射镜 63、 MUX 64和 PD 65, 0LT还包括处理器 66。
激光器 61通过所述第一部分反射镜 62、 所述 MUX 64和所述第二部分反 射镜 63连接, 所述 PD 65与所述第一部分反射镜 62连接, 处理器 66与所述 PD 65和所述激光器 61连接。 其中, 处理器 66与 PD 65和所述激光器 61 之间的连接为电连接; 激光器 61通过所述第一部分反射镜 62、 所述 MUX 64 和所述第二部分反射镜 63之间的连接, 以及所述 PD 65与所述第一部分反射 镜 62之间的连接为光连接, 如图 6中, 实线为电连接, 实箭头线为光连接, 箭头方向为光传播方向。
所述激光器 61, 用于根据所述处理器 66 的指示, 在调节范围内, 出射 光信号。
所述 PD 65, 用于检测由所述激光器 61出射, 通过所述第一部分反射镜 62和所述 MUX 64, 到达第二部分反射镜 63, 由所述第二部分反射镜 63反射 并通过所述 MUX 64到达所述第一部分反射镜 62的反射光, 得到所述反射光 的光功率。
所述处理器 66,用于指示所述激光器 61在调节范围内, 调节所述激光器 的相位区注入电流 I 或者增益区的温度, 获得所述激光器的光功率谱, 所 述光功率谱指示激光器的布拉格反射区的电流 I,与所述 PD检测获得的反射 光的光功率的对应关系; 从获得的光功率谱中确定轴对称性最佳的光功率谱 为目标光功率谱; 将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以 及所述目标光功率谱中峰值点所标示的 iDBR中至少两个参数作为调节激光器 的参数。
进一歩, 处理器 66 指示所述激光器在调节范围内, 调节所述激光器的 相位区注入电流 IPhas6或者增益区的温度, 获得所述激光器的光功率谱, 具体 包括: 所述处理器 66 指示所述激光器在调节范围内, 按预设歩长调节 Ip 或者增益区的温度, 以及指示所述 PD测量所述反射光的光功率, 测得光功率 谱; 所述处理器 66针对每一个测得的光功率谱, 判断所述测得的光功率谱是 否满足第一判断条件、 第二判断条件和第三判断条件; 若所述测得的光功率 谱满足第一判断条件、 第二判断条件和第三判断条件, 则将所述测得的光功 率谱作为所述获得的光功率谱; 若所述测得的光功率谱不满足所述第一判断 条件, 且已存在所述获得的光功率谱, 则停止测量; 其中, 所述第一判断条 件为光功率谱的峰值点所标示的反射光的光功率大于第一阈值, 所述第一阈 值是根据激光器的出光功率和反射光在光传输链路中的光损耗确定的; 所述 第二判断条件为第一跳模点和第二跳模点之间的反射光的光功率差的绝对值 小于第二阈值, 所述第二阈值是根据激光器的出光功率、 反射光在光传输链 路中的光损耗和 MUX的隔离度确定的; 所述第三判断条件为光功率谱的对称
Figure imgf000020_0001
为第二跳模点所标示的 IDBR, /m为峰值点所标示的 IDBR, 所述第三阈值是根据 激光器的出光功率、 I,的取值范围、 MUX的通道带宽和 MUX的隔离度确定的。
进一歩,处理器 66从所述获得的光功率谱中确定轴对称性最佳的光功率 谱为目标光功率谱, 具体包括: 所述处理器 56计算每一个光功率谱的对称值 是第二跳模点所
Figure imgf000020_0002
标示的 IDBR, /m是所述光功率谱的峰值点所标示的 IDBR; 所述第一跳模点是沿 I,减小方向距离光功率谱的峰值点最近的跳模点; 所述第二跳模点是沿 IDBR 增大方向距离光功率谱的峰值点最近的跳模点;所述处理器 56在各所述光功 率谱中, 将具有最小对称值的光功率谱作为对称性最佳的目标光功率谱。 跳 模点所标示的反射光的光功率大于至少一个与所述跳模点相邻的相邻点所标 示的反射光的光功率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是根据所述激光器的出光功率和所述 MUX的隔离度确定的。
进- 0LT, 还可以包括驱动电路, 该驱动电路与所述处理器 66和所 述激光器 61连接, 用于根据所述处理器 66的指示, 在调节范围内, 调节所 述激光器 61的相位区注入电流 IPhas6或者增益区的温度。
本实施例提供的 0LT的各功能模块可用于执行第一个实施例所示的激 光器的波长对准方法, 其具体工作原理不再赘述, 详见方法实施例的描述。
本实施例中,通过在调节范围内,调节激光器的 IPhas6或者增益区的温度, 测量获得激光器的光功率谱, 然后从各光功率谱中确定轴对称性最佳的光功 率谱为目标光功率谱,将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及目标光功率谱中峰值点所标示的 IDBR至少两个参数作为调节激光器的参 数, 从而避免利用激光器参数与出射光波长的映射关系表, 确定调节激光器 的参数, 降低了激光器的成本。 图 7 为本发明第五个实施例提供的一种激光器的波长对准方法的流程
/」、意图, 本实施例中的激光器的波长对准方法, 可由 0LT实施, 对 0NU中的 激光器进行波长对准, 该激光器通过 MUX与光线路终端 0LT连接, 所述激光 器的出射光通过所述 MUX, 到达所述 OLT, 由所述 OLT检测获得透射光, 如图 7所示, 包括:
701、在调节范围内,指示激光器调节相位区注入电流 IPhas6或者增益区的 温度, 获得所述激光器的光功率谱。
其中,光功率谱指示激光器的布拉格反射区的电流 I,与所述透射光的光 功率的对应关系。
可选的, 在调节范围内, 指示所述激光器按预设歩长调节 Ip 或者增益 区的温度, 测量光功率谱; 针对每一个测得的光功率谱, 判断所述测得的光 功率谱是否满足第一判断条件、 第二判断条件和第三判断条件; 若测得的光 功率谱满足所述第一判断条件、 所述第二判断条件和所述第三判断条件, 则 保存测得的光功率谱; 若所述测得的光功率谱不满足所述第一判断条件, 且 已存在所述获得的光功率谱, 则停止测量。 其中, 所述第一判断条件为光功 率谱的峰值点所标示的透射光的光功率大于第一阈值, 所述第一阈值是根据 激光器的出光功率和透射光在光传输链路中的光损耗确定的; 所述第二判断 条件为第一跳模点和第二跳模点之间的透射光的光功率差的绝对值小于第二 阈值, 所述第二阈值是根据激光器的出光功率、 透射光在光传输链路中的光 损耗和 MUX 的隔离度确定的; 所述第三判断条件为光功率谱的对称值 + I 小于第三阈值, 其中, /。皿为第一跳模点所标示的 IDBR, IDBR2 ¾
2
第二跳模点所标示的 IDBR, /m为峰值点所标示的 IDBR, 所述第三阈值是根据激 光器的出光功率、 IDBR的取值范围、 MUX的通道带宽和 MUX的隔离度确定的。
702、 从获得的光功率谱中确定轴对称性最佳的光功率谱为目标光功率
可选的, 计算每一个光功率谱的对称值 + I 一跳模点所标示的 iDBR 2是第二跳模点所标示的 iDBR, ^是所述光功率谱 的峰值点所标示的 IDBR ; 所述第一跳模点是沿 I,减小方向距离光功率谱的峰 值点最近的跳模点;所述第二跳模点是沿 IDBR增大方向距离光功率谱的峰值点 最近的跳模点; 在各所述光功率谱中, 将具有最小对称值的光功率谱作为对 称性最佳的目标光功率谱。 其中, 跳模点所标示的反射光的光功率大于至少 一个与所述跳模点相邻的相邻点所标示的反射光的光功率, 且与所述相邻点 所标示的光功率之差大于第四阈值; 所述第四阈值是根据所述激光器的出光 功率和所述 MUX的隔离度确定的。
703、将确定的目标光功率谱对应的 IPhas6或者增益区的温度, 以及所述目 标光功率谱中峰值点所标示的 IDBR至少两个参数作为调节激光器的参数。
704、 发送所述调节激光器的参数。
可选的, 发送物理层操作管理和维护 (Phys ical Layer Operat i ons, Admini strat ion and Maint enance PLOAM ) 消息; 所述 PLOAM消息中的保 留 (Reserve ) 字段或者所述 PLOAM消息中的调整控制 (Tun ing Control ) 字 段携带所述调节激光器的参数。 以使 0NU根据调节激光器的参数, 对 0NU中 的激光器进行波长对准。
本实施例中,通过在调节范围内,调节激光器的 Ip 或者增益区的温度, 测量获得激光器的光功率谱, 然后从各光功率谱中确定轴对称性最佳的光功 率谱为目标光功率谱,将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及目标光功率谱中峰值点所标示的 I,至少两个参数作为调节激光器的参 数, 从而避免利用激光器参数与出射光波长的映射关系表, 确定调节激光器 的参数, 降低了激光器的成本。 图 8 为本发明第六个实施例提供的一种激光器的波长对准装置的结构 示意图, 本实施例中的激光器的波长对准装置设置于 0LT中, 对 0NU中的激 光器进行波长对准, 如图 8所示, 激光器的波长对准装置包括: 获得模块 81 确定模块 82、 参数模块 83和发送模块 84
获得模块 81, 用于在调节范围内, 指示激光器调节相位区注入电流 Ip 或者增益区的温度, 获得所述激光器的光功率谱。
其中,光功率谱指示激光器的布拉格反射区的电流 I,与所述透射光的光 功率的对应关系; 所述透射光是设置于光网络单元 0NU中的所述激光器的出 射光通过波分多路复用器 MUX ,到达光线路终端 0LT ,由所述 0LT检测获得的。 可选的, 获得模块 81, 具体用于在调节范围内, 指示所述激光器按预设 歩长调节 IphaSe或者增益区的温度, 测量光功率谱; 针对每一个测得的光功率 谱, 判断所述测得的光功率谱是否满足第一判断条件、 第二判断条件和第三 判断条件; 若测得的光功率谱满足所述第一判断条件、 所述第二判断条件和 所述第三判断条件, 则保存测得的光功率谱; 若所述测得的光功率谱不满足 所述第一判断条件, 且已存在所述获得的光功率谱, 则停止测量; 其中, 所 述第一判断条件为光功率谱的峰值点所标示的透射光的光功率大于第一阈 值, 所述第一阈值是根据激光器的出光功率和透射光在光传输链路中的光损 耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的透射光的光 功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出光功率、 透 射光在光传输链路中的光损耗和 MUX的隔离度确定的; 所述第三判断条件为
Figure imgf000023_0001
跳模点所 标示的 L
Figure imgf000023_0002
为峰值点所标示的 IDBR, 所述 第三阈值是根据激光器的出光功率、 I,的取值范围、 MUX的通道带宽和 MUX 的隔离度确定的。
确定模块 82, 与获得模块 81连接, 用于从获得的光功率谱中确定轴对 称性最佳的光功率谱为目标光功率谱。
可选的, 确定模块, 可以包括: 计算单元, 用于计算每一个光功率谱的 是第
Figure imgf000023_0003
模点所标示的 IDBR, /m是所述光功率谱的峰值点所标示的 IDBR; 所述第一跳模 点是沿 IDBR减小方向距离光功率谱的峰值点最近的跳模点;所述第二跳模点是 沿 I,增大方向距离光功率谱的峰值点最近的跳模点,所述跳模点所标示的反 射光的光功率大于至少一个与所述跳模点相邻的相邻点所标示的反射光的光 功率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是 根据所述激光器的出光功率和所述 MUX的隔离度确定的。 确定模块, 还可以 包括确定单元, 用于在各所述光功率谱中, 将具有最小对称值的光功率谱作 为对称性最佳的目标光功率谱。
参数模块 83, 与确定模块 82连接, 用于将确定的目标光功率谱对应的
Ipha: 或者增益区的温度, 以及所述目标光功率谱中峰值点所标示的 I,至少两 :数作为调节激光器的参数。
发送模块 84, 与参数模块 83连接, 用于发送所述调节激光器的参数。 可选的, 发送模块 84具体用于发送 PL0AM消息; 所述 PL0AM消息中的 Reserve字段或者所述 PL0AM消息中的 Tuning Control字段携带所述调节激 光器的参数。 本实施例提供的激光器的波长对准装置的各功能模块可用于执行第五 个实施例的激光器的波长对准方法流程, 其具体工作原理不再赘述, 详见 方法实施例的描述。
本实施例中,通过在调节范围内,调节激光器的 Ip 或者增益区的温度, 测量获得激光器的光功率谱, 然后从各光功率谱中确定轴对称性最佳的光功 率谱为目标光功率谱,将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及目标光功率谱中峰值点所标示的 I,至少两个参数作为调节激光器的参 数, 从而避免利用激光器参数与出射光波长的映射关系表, 确定调节激光器 的参数, 降低了激光器的成本。 图 9为本发明第七个实施例提供的一种 0LT 90的结构示意图, 如图 9 所示,本实施例中的 0LT 90用于对 0NU中的激光器进行波长对准,包括: MUX 91、 接收机 92、 发送机 93和处理器 94。
MUX 91与接收机 92连接, 处理器 94分别与所述接收机 92和所述发送 机 93连接。 其中, MUX 91与接收机 92之间的连接为光连接, 处理器 94分 别与所述接收机 92和所述发送机 93之间的连接为电连接, 如图 9所示, 实 线为电连接, 实箭头线为光连接, 箭头方向为光传播方向。
所述接收机 92, 用于检测由激光器所出射, 通过所述 MUX的透射光, 获 得所述透射光的光功率。
所述处理器 94, 用于在调节范围内, 指示所述激光器调节相位区注入电 流 Ip 或者增益区的温度, 获得所述激光器的光功率谱, 所述光功率谱指示 激光器的布拉格反射区的电流 I,与所述接收机获得的透射光的光功率的对 应关系;从获得的光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱; 将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及所述目标光功率 谱中峰值点所标示的 I,至少两个参数作为调节激光器的参数。
所述发送机 93, 用于发送所述调节激光器的参数。
进一歩, 处理器 94在调节范围内, 指示激光器调节相位区注入电流 I 或者增益区的温度, 获得所述激光器的光功率谱, 具体包括: 所述处理器 94 在调节范围内, 指示所述激光器按预设歩长调节 Ip 或者增益区的温度, 测 量光功率谱; 所述处理器 94针对每一个测得的光功率谱, 判断所述测得的光 功率谱是否满足第一判断条件、 第二判断条件和第三判断条件; 若测得的光 功率谱满足所述第一判断条件、 所述第二判断条件和所述第三判断条件, 则 保存测得的光功率谱; 若所述测得的光功率谱不满足所述第一判断条件, 且 已存在所述获得的光功率谱, 则停止测量; 其中, 所述第一判断条件为光功 率谱的峰值点所标示的透射光的光功率大于第一阈值, 所述第一阈值是根据 激光器的出光功率和透射光在光传输链路中的光损耗确定的; 所述第二判断 条件为第一跳模点和第二跳模点之间的透射光的光功率差的绝对值小于第二 阈值, 所述第二阈值是根据激光器的出光功率、 透射光在光传输链路中的光 损耗和 MUX 的隔离度确定的; 所述第三判断条件为光功率谱的对称值 + I 小于第三阈值, 其中, / 为第一跳模点所标示的 IDBR, 1 为
2
第二跳模点所标示的 IDBR, /m为峰值点所标示的 IDBR, 所述第三阈值是根据激 光器的出光功率、 IDBR的取值范围、 MUX的通道带宽和 MUX的隔离度确定的。
进一歩,处理器 94从获得的光功率谱中确定轴对称性最佳的光功率谱为 目标光功率谱, 具体包括: 所述处理器 94 计算每一个光功率谱的对称值 + I 其中, / 1是第一跳模点所标示的 IDBR, / 2是第二跳模点所
2
标示的 IDBR, /m是所述光功率谱的峰值点所标示的 IDBR; 所述第一跳模点是沿 I,减小方向距离光功率谱的峰值点最近的跳模点; 所述第二跳模点是沿 IDBR 增大方向距离光功率谱的峰值点最近的跳模点, 所述跳模点所标示的反射光 的光功率大于至少一个与所述跳模点相邻的相邻点所标示的反射光的光功 率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是根 据所述激光器的出光功率和所述 MUX的隔离度确定的。 ; 所述处理器 94在各 所述光功率谱中, 将具有最小对称值的光功率谱作为对称性最佳的目标光功 率谱。
进一歩, 所述发送机 93发送所述调节激光器的参数, 具体包括: 发送机
93发送 PL0AM消息; 所述 PL0AM消息中的 Reserve字段或者所述 PL0AM消息 中的 Tuning Control字段携带所述调节激光器的参数。
本实施例提供的 0LT的各功能模块可用于执行第五个实施例的激光器 的波长对准方法流程, 其具体工作原理不再赘述, 详见方法实施例的描述。
本实施例中,通过在调节范围内,调节激光器的 IPhas6或者增益区的温度, 测量获得激光器的光功率谱, 然后从各光功率谱中确定轴对称性最佳的光功 率谱为目标光功率谱,将确定的目标光功率谱对应的 IP 或者增益区的温度, 以及目标光功率谱中峰值点所标示的 I,至少两个参数作为调节激光器的参 数, 从而避免利用激光器参数与出射光波长的映射关系表, 确定调节激光器 的参数, 降低了激光器的成本。 图 10为本发明第八个实施例提供的 P0N系统的结构示意图, 如图 10所 示, 本实施例中的 P0N系统可以包括: 0LT 90和 0NU 10 , 在本实施例中, 0LT 90对 0NU 10中的激光器进行波长对准, 所述 0LT 90与所述 0NU 10连 接, 本实施例中, 0LT 90和 0NU 10具体通过 MUX连接。
0LT 90, 用于在调节范围内, 指示 0NU 10调节激光器的相位区注入电流
Ip 或者增益区的温度, 获得所述激光器的光功率谱, 所述光功率谱指示激 光器的布拉格反射区的电流 1,与所述透射光的光功率的对应关系;从获得的 光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱; 将确定的目标光 功率谱对应的 Ip 或者增益区的温度, 以及所述目标光功率谱中峰值点所标 示的 IDBR至少两个参数作为调节激光器的参数; 发送所述调节激光器的参数。
需要说明的是, 本实施例中的 0LT 90 具体执行第五个实施例的激光 器的波长对准方法流程, 其具体工作原理不再赘述, 详见方法实施例的描 述。
0NU 10, 与 0LT 90连接, 用于根据所述 0LT 90的指示, 调节激光器的 相位区注入电流 IPhas6或者增益区的温度; 以及接收所述 0LT 90发送的所述 调节激光器的参数, 根据所述调节激光器的参数进行波长对准。 也就是说, 0LT90将激光器的参数调为接收到的调节激光器的参数,从而实现波长对准。
本实施例中,通过在调节范围内,调节激光器的 IPhas6或者增益区的温度, 测量获得激光器的光功率谱, 然后从各光功率谱中确定轴对称性最佳的光功 率谱为目标光功率谱,将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及目标光功率谱中峰值点所标示的 I,至少两个参数作为调节激光器的参 数, 从而避免利用激光器参数与出射光波长的映射关系表, 确定调节激光器 的参数, 降低了激光器的成本。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分歩骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的歩骤; 而前述 的存储介质包括: R0M、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改, 者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求 书
1、 一种激光器的波长对准方法, 其特征在于, 所述方法包括:
在调节范围内, 调节激光器的相位区注入电流 Ip 或者增益区的温度, 获得所述激光器的光功率谱, 所述光功率谱指示激光器的布拉格反射区的电 流 I,与激光器的出射光的光功率的对应关系;所述出射光为所述激光器所出 射的光信号通过一部分反射镜和波分多路复用器 MUX, 到达第二部分反射镜, 由所述第二部分反射镜反射并通过所述 MUX到达所述第一部分反射镜, 获得 的反射光; 或者, 所述出射光为所述激光器所出射的光信号通过所述 MUX, 获得的透射光;
从获得的光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱; 将确定的目标光功率谱对应的 I 或者增益区的温度, 以及所述目标光 功率谱中峰值点所标示的 IDBR中至少两个参数作为调节激光器的参数。
2、 根据权利要求 1所述的激光器的波长对准方法, 其特征在于, 所述从 所述获得的光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱,包括:
是第一跳模点
Figure imgf000028_0001
DBR2 是所述光功率谱的峰值点 所标示的 IDBR; 所述第一跳模点是沿 1,减小方向距离光功率谱的峰值点最近 的跳模点;所述第二跳模点是沿 IDBR增大方向距离光功率谱的峰值点最近的跳 模点;
在各所述光功率谱中, 将具有最小对称值的光功率谱作为对称性最佳的 目标光功率谱。
3、 根据权利要求 1或 2所述的激光器的波长对准方法, 其特征在于, 所 述在调节范围内, 调节激光器的相位区注入电流 I 或者增益区的温度, 获 得所述激光器的光功率谱, 包括:
在调节范围内,按预设歩长调节 Ip 或者增益区的温度,测量光功率谱; 针对每个测得的光功率谱, 判断所述测得的光功率谱是否满足第一判断 条件、 第二判断条件和第三判断条件; 若所述测得的光功率谱满足第一判断 条件、 第二判断条件和第三判断条件, 则将所述测得的光功率谱作为所述获 得的光功率谱; 若所述测得的光功率谱不满足所述第一判断条件, 且已存在 所述获得的光功率谱, 则停止测量; 其中, 所述第一判断条件为光功率谱的峰值点所标示的出射光的光功率 大于第一阈值, 所述第一阈值是根据激光器的出光功率和出射光在光传输链 路中的光损耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的 出射光的光功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出 光功率、 出射光在光传输链路中的光损耗和 MUX的隔 所述 三 判断条件为光功率谱的对称值 + I
Figure imgf000029_0001
一跳模点所标示的 iDBR, / 2为第二跳模点所标示的 iDBR, /m为峰值点所标小 的 IDBR, 所述第三阈值是根据激光器的出光功率、 IDBR的取值范围、 MUX的通道 带宽和 MUX的隔离度确定的。
4、 根据权利要求 2所述的激光器的波长对准方法, 其特征在于, 所述跳 模点所标示的出射光的光功率大于至少一个与所述跳模点相邻的相邻点所标 示的出射光的光功率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是根据所述激光器的出光功率和所述 MUX的隔离度确定的。
5、根据权利要求 1-4任一项所述的激光器的波长对准方法,其特征在于, 所述将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及所述目标光 功率谱中峰值点所标示的 1,中至少两个参数作为调节激光器的参数之后,还 包括:
发送所述调节激光器的参数。
6、 根据权利要求 5所述的激光器的波长对准方法, 其特征在于, 所述发 送所述调节激光器的参数包括:
发送物理层操作管理和维护 PL0AM 消息; 所述 PL0AM 消息中的保留 Reserve字段或者所述 PL0AM消息中的调整控制 Tuning Control字段携带所 述调节激光器的参数。
7、 一种激光器的波长对准装置, 其特征在于, 所述装置, 包括: 获得模块, 用于调节激光器的相位区注入电流 IPhas6或者增益区的温度, 获得所述激光器的光功率谱, 所述光功率谱指示激光器的布拉格反射区的电 流 I,与激光器的出射光的光功率的对应关系;所述出射光为所述激光器所出 射的光信号, 通过一部分反射镜和波分多路复用器 MUX, 到达第二部分反射 镜, 由所述第二部分反射镜反射并通过所述 MUX到达所述第一部分反射镜, 获得的反射光; 或者, 所述出射光为所述激光器所出射的光信号, 通过所述 MUX, 获得的透射光;
确定模块, 用于从获得的光功率谱中确定轴对称性最佳的光功率谱为目 标光功率谱;
参数模块, 用于将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及所述目标光功率谱中峰值点所标示的 I,中至少两个参数作为调节激光 器的参数。
8、 根据权利要求 7所述的激光器的波长对准装置, 其特征在于, 所述确 定模块, 包括:
计算单元,用于计算每一个光功率谱的对称值 + I ;其中 是第一跳模点所标示的 IDBR 2是第二跳模点所标示的 IDBR, /m是所述光功 率谱的峰值点所标示的 IDBR; 所述第一跳模点是沿 I,减小方向距离光功率谱 的峰值点最近的跳模点;所述第二跳模点是沿 IDBR增大方向距离光功率谱的峰 值点最近的跳模点;
确定单元, 用于在各所述光功率谱中, 将具有最小对称值的光功率谱作 为对称性最佳的目标光功率谱。
9、 根据权利要求 7或 8所述的激光器的波长对准装置, 其特征在于, 所述获得模块, 具体用于在调节范围内, 按预设歩长调节 Ip 或者增益 区的温度, 测量光功率谱; 针对每一个测得的光功率谱, 判断所述测得的光 功率谱是否满足第一判断条件、 第二判断条件和第三判断条件; 若所述测得 的光功率谱满足第一判断条件、 第二判断条件和第三判断条件, 则将所述测 得的光功率谱作为所述获得的光功率谱; 若所述测得的光功率谱不满足所述 第一判断条件, 且已存在所述获得的光功率谱, 则停止测量;
其中, 所述第一判断条件为光功率谱的峰值点所标示的出射光的光功率 大于第一阈值, 所述第一阈值是根据激光器的出光功率和出射光在光传输链 路中的光损耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的 出射光的光功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出 光功率、 出射光在光传输链路中的光损耗和 MUX的隔 所述 三 判断条件为光功率谱的对称值 + I
Figure imgf000030_0001
一跳模点所标示的 IDBR 2为第二跳模点所标示的 I,, /„为峰值点所标示 的 IDBR, 所述第三阈值是根据激光器的出光功率、 IDBR的取值范围、 MUX的通道 带宽和 MUX的隔离度确定的。
10、 根据权利要求 8所述的激光器的波长对准装置, 其
所述计算单元, 具体用于计算每一个光功率谱的对称值 其中, / i是第一跳模点所标示的 : , / 2是第二跳模点所标示的: , ^是 所述光功率谱的峰值点所标示的 iDBR ; 所述第一跳模点是沿 I,减小方向距离 光功率谱的峰值点最近的跳模点;所述第二跳模点是沿 I,增大方向距离光功 率谱的峰值点最近的跳模点; 所述跳模点所标示的出射光的光功率大于至少 一个与所述跳模点相邻的相邻点所标示的出射光的光功率, 且与所述相邻点 所标示的光功率之差大于第四阈值; 所述第四阈值是根据所述激光器的出光 功率和所述 MUX的隔离度确定的。
11、根据权利要求 7-10任一项所述的激光器的波长对准装置, 其特征在 于, 所述装置, 还包括:
发送模块, 用于发送所述调节激光器的参数。
12、 根据权利要求 11所述的激光器的波长对准装置, 其特征在于, 所述发送模块, 具体用于发送物理层操作管理和维护 PL0AM消息; 所述 PL0AM消息中的保留 Reserve字段或者所述 PL0AM消息中的调整控制 Tuning Control字段携带所述调节激光器的参数。
13、 一种光网络单元 0NU, 其特征在于, 包括: 激光器、 第一部分反射 镜、 第二部分反射镜、 波分多路复用器 MUX和光敏二极管 PD, 所述激光器通 过所述第一部分反射镜、所述 MUX和所述第二部分反射镜连接, 所述 PD与所 述第一部分反射镜连接; 所述 0NU, 还包括: 处理器, 与所述 PD和所述激光 器连接;
所述激光器, 用于根据所述处理器的指示, 在调节范围内, 出射光信号; 所述 PD, 用于检测由所述激光器出射的光信号通过所述第一部分反射镜 和所述 MUX, 到达第二部分反射镜, 由所述第二部分反射镜反射并通过所述 MUX 到达所述第一部分反射镜的反射光, 得到所述反射光的光功率, 向所述 处理器发送所述反射光的光功率;
所述处理器, 用于指示所述激光器在调节范围内, 调节所述激光器的相 位区注入电流 Ip 或者增益区的温度, 获得所述激光器的光功率谱, 所述光 功率谱指示激光器的布拉格反射区的电流 I,与所述 PD检测获得的反射光的 光功率的对应关系; 从获得的光功率谱中确定轴对称性最佳的光功率谱为目 标光功率谱; 将确定的目标光功率谱对应的 IP 或者增益区的温度, 以及所 述目标光功率谱中峰值点所标示的 I,中至少两个参数作为调节激光器的参 数。
14、 根据权利要求 13所述的 0NU, 其特征在于, 所述处理器从所述获得 的光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱, 具体包括: 所述处理器计算每一个光功率谱的对称值 + I 第一跳模点所标示的 IDBR, /。皿是第二跳模点所标示的 IDBR, /m是所述光功率 谱的峰值点所标示的 iDBR; 所述第一跳模点是沿 IDBR减小方向距离光功率谱的 峰值点最近的跳模点;所述第二跳模点是沿 I,增大方向距离光功率谱的峰值 点最近的跳模点;
所述处理器在各所述光功率谱中, 将具有最小对称值的光功率谱作为对 称性最佳的目标光功率谱。
15、 根据权利要求 13或 14所述的 0NU, 其特征在于, 所述处理器指示 所述激光器在调节范围内, 调节所述激光器的相位区注入电流 IPh ^或者增益 区的温度, 获得所述激光器的光功率谱, 具体包括:
所述处理器指示所述激光器在调节范围内, 按预设歩长调节 Iphas6或者增 益区的温度, 以及指示所述 PD测量所述反射光的光功率, 测得光功率谱; 所述处理器针对每一个测得的光功率谱, 判断所述测得的光功率谱是否 满足第一判断条件、 第二判断条件和第三判断条件; 若所述测得的光功率谱 满足第一判断条件、 第二判断条件和第三判断条件, 则将所述测得的光功率 谱作为所述获得的光功率谱; 若所述测得的光功率谱不满足所述第一判断条 件, 且已存在所述获得的光功率谱, 则停止测量;
其中, 所述第一判断条件为光功率谱的峰值点所标示的反射光的光功率 大于第一阈值, 所述第一阈值是根据激光器的出光功率和反射光在光传输链 路中的光损耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的 反射光的光功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出 光功率、 反射光在光传输链路 所述 三 判断条件为光功率谱的对称值
Figure imgf000032_0001
一跳模点所标示的 IDBR, / 2为第二跳模点所标示的 I,, /„为峰值点所标示 的 IDBR, 所述第三阈值是根据激光器的出光功率、 IDBR的取值范围、 MUX的通道 带宽和 MUX的隔离度确定的。
16、 根据权利要求 14所述的 0NU, 其特征在于, 所述跳模点所标示的反 射光的光功率大于至少一个与所述跳模点相邻的相邻点所标示的反射光的光 功率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是 根据所述激光器的出光功率和所述 MUX的隔离度确定的。
17、 根据权利要求 13-16任一项所述的 0NU, 其特征在于, 所述 0NU, 还 包括: 驱动电路;
所述驱动电路, 与所述处理器和所述激光器连接, 用于根据所述处理器 的指示, 在调节范围内, 调节所述激光器的相位区注入电流 Ip 或者增益区 的温度;
所述激光器, 在所述驱动电路的驱动下, 出射光信号。
18、 一种光线路终端 0LT, 其特征在于, 包括: 激光器、 第一部分反射 镜、 第二部分反射镜、 波分多路复用器 MUX和光敏二极管 PD, 所述激光器通 过所述第一部分反射镜、所述 MUX和所述第二部分反射镜连接, 所述 PD与所 述第一部分反射镜连接; 所述 0LT, 还包括: 处理器, 与所述 PD和所述激光 器连接;
所述激光器, 用于根据所述处理器的指示, 在调节范围内, 出射光信号; 所述 PD, 用于检测由所述激光器出射的光信号通过所述第一部分反射镜 和所述 MUX, 到达第二部分反射镜, 由所述第二部分反射镜反射并通过所述 MUX 到达所述第一部分反射镜的反射光, 得到所述反射光的光功率, 向所述 处理器发送所述反射光的光功率;
所述处理器, 用于指示所述激光器在调节范围内, 调节所述激光器的相 位区注入电流 Ip 或者增益区的温度, 获得所述激光器的光功率谱, 所述光 功率谱指示激光器的布拉格反射区的电流 I,与所述 PD检测获得的反射光的 光功率的对应关系; 从获得的光功率谱中确定轴对称性最佳的光功率谱为目 标光功率谱; 将确定的目标光功率谱对应的 Iph 或者增益区的温度, 以及所 述目标光功率谱中峰值点所标示的 I,中至少两个参数作为调节激光器的参
19、 根据权利要求 18所述的 0LT, 其特征在于, 所述处理器从所述获得 的光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱, 具体包括: 所述处理器计算每一个光功率谱的对称值 + I 第一跳模点所标示的 IDBR, /。皿是第二跳模点所标示的 IDBR, /m是所述光功率 谱的峰值点所标示的 iDBR; 所述第一跳模点是沿 IDBR减小方向距离光功率谱的 峰值点最近的跳模点;所述第二跳模点是沿 I,增大方向距离光功率谱的峰值 点最近的跳模点;
所述处理器在各所述光功率谱中, 将具有最小对称值的光功率谱作为对 称性最佳的目标光功率谱。
20、 根据权利要求 18或 19所述的 0LT, 其特征在于, 所述处理器指示 所述激光器在调节范围内, 调节所述激光器的相位区注入电流 IPh ^或者增益 区的温度, 获得所述激光器的光功率谱, 具体包括:
所述处理器指示所述激光器在调节范围内, 按预设歩长调节 Iphas6或者增 益区的温度, 以及指示所述 PD测量所述反射光的光功率, 测得光功率谱; 所述处理器针对每一个测得的光功率谱, 判断所述测得的光功率谱是否 满足第一判断条件、 第二判断条件和第三判断条件; 若所述测得的光功率谱 满足第一判断条件、 第二判断条件和第三判断条件, 则将所述测得的光功率 谱作为所述获得的光功率谱; 若所述测得的光功率谱不满足所述第一判断条 件, 且已存在所述获得的光功率谱, 则停止测量;
其中, 所述第一判断条件为光功率谱的峰值点所标示的反射光的光功率 大于第一阈值, 所述第一阈值是根据激光器的出光功率和反射光在光传输链 路中的光损耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的 反射光的光功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出 光功率、 反射光在光传输链路 所述 三 判断条件为光功率谱的对称值
Figure imgf000034_0001
一跳模点所标示的 iDBR, / 2为第二跳模点所标示的 iDBR, /m为峰值点所标小 的 IDBR, 所述第三阈值是根据激光器的出光功率、 IDBR的取值范围、 MUX的通道 带宽和 MUX的隔离度确定的。
21、 根据权利要求 19所述的 0LT, 其特征在于, 所述跳模点所标示的反 射光的光功率大于至少一个与所述跳模点相邻的相邻点所标示的反射光的光 功率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是 根据所述激光器的出光功率和所述 MUX的隔离度确定的。
22、 根据权利要求 18-21任一项所述的 0LT, 其特征在于, 所述 0LT, 还 包括: 驱动电路;
所述驱动电路, 与所述处理器和所述激光器连接, 用于根据所述处理器
Figure imgf000034_0002
在调节范围内, 调节所述激光器的相位区注入电流 Ip 或者增益区 的温度;
所述激光器, 在所述驱动电路的驱动下, 出射光信号。
23、 一种光线路终端 0LT, 其特征在于, 包括: 波分多路复用器 MUX、 接 收机、 发送机和处理器; 所述处理器分别与所述接收机和所述发送机连接; 所述接收机,用于检测由激光器所出射的光信号通过所述 MUX的透射光, 获得所述透射光的光功率;
所述处理器, 用于在调节范围内, 指示所述激光器调节相位区注入电流
Ip 或者增益区的温度, 获得所述激光器的光功率谱, 所述光功率谱指示激 光器的布拉格反射区的电流 I,与所述接收机获得的透射光的光功率的对应 关系; 从获得的光功率谱中确定轴对称性最佳的光功率谱为目标光功率谱; 将确定的目标光功率谱对应的 Ip 或者增益区的温度, 以及所述目标光功率 谱中峰值点所标示的 I,至少两个参数作为调节激光器的参数;
所述发送机, 用于发送所述调节激光器的参数。
24、 根据权利要求 23所述的 0LT, 其特征在于, 所述处理器从获得的光 功率谱中确定轴对称性最佳的光功率谱为目标光功率谱, 具体包括:
所述处理器计算每一个光功率谱的对称值 + I 第一跳模点所标示的 IDBR, /。皿是第二跳模点所标示的 IDBR, /m是所述光功率 谱的峰值点所标示的 iDBR; 所述第一跳模点是沿 IDBR减小方向距离光功率谱的 峰值点最近的跳模点;所述第二跳模点是沿 I,增大方向距离光功率谱的峰值 点最近的跳模点;
所述处理器在各所述光功率谱中, 将具有最小对称值的光功率谱作为对 称性最佳的目标光功率谱。
25、 根据权利要求 23或 24所述的 0LT, 其特征在于, 所述处理器在调 节范围内, 指示激光器调节相位区注入电流 I 或者增益区的温度, 获得所 述激光器的光功率谱, 具体包括:
所述处理器在调节范围内, 指示所述激光器按预设歩长调节 Iphas6或者增 益区的温度, 测量光功率谱;
所述处理器针对每一个测得的光功率谱, 判断所述测得的光功率谱是否 满足第一判断条件、 第二判断条件和第三判断条件; 若测得的光功率谱满足 所述第一判断条件、 所述第二判断条件和所述第三判断条件, 则保存测得的 光功率谱; 若所述测得的光功率谱不满足所述第一判断条件, 且已存在所述 获得的光功率谱, 则停止测量;
其中, 所述第一判断条件为光功率谱的峰值点所标示的透射光的光功率 大于第一阈值, 所述第一阈值是根据激光器的出光功率和透射光在光传输链 路中的光损耗确定的; 所述第二判断条件为第一跳模点和第二跳模点之间的 透射光的光功率差的绝对值小于第二阈值, 所述第二阈值是根据激光器的出 光功率、 透射光在光传输链路中的光损耗和 MUX的隔离度确定的; 所述第三 判断条件为光功率谱的对称值
Figure imgf000036_0001
一跳模点所标示的 IDBR, / 2为第二跳模点所标示的 I,, /„为峰值点所标示 的 IDBR, 所述第三阈值是根据激光器的出光功率、 IDBR的取值范围、 MUX的通道 带宽和 MUX的隔离度确定的。
26、 根据权利要求 24所述的 0LT , 其特征在于, 所述跳模点所标示的反 射光的光功率大于至少一个与所述跳模点相邻的相邻点所标示的透射光的光 功率, 且与所述相邻点所标示的光功率之差大于第四阈值; 所述第四阈值是 根据所述激光器的出光功率和所述 MUX的隔离度确定的。
27、 根据权利要求 23-26任一项所述的 0LT, 其特征在于, 所述发送机 发送所述调节激光器的参数, 具体包括:
所述发送机发送物理层操作管理和维护 PL0AM消息; 所述 PL0AM消息中 的保留 Reserve字段或者所述 PL0AM消息中的调整控制 Tuning Control字段 携带所述调节激光器的参数。
28、 一种无源光网络 P0N系统, 其特征在于, 包括如权利要求 23-27任 一项所述的光线路终端 0LT, 以及光网络单元 0NU; 所述 0LT与所述 0NU连 接;
所述 0NU,用于根据所述 0LT的指示,调节激光器的相位区注入电流 Iphas6 或者增益区的温度; 以及接收所述 0LT发送的所述调节激光器的参数, 根据 所述调节激光器的参数进行波长对准。
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