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WO2014148511A1 - Dispositif de surveillance de puissance optique, procédé de surveillance de puissance optique et dispositif de génération laser utilisant un dispositif de surveillance de puissance optique - Google Patents

Dispositif de surveillance de puissance optique, procédé de surveillance de puissance optique et dispositif de génération laser utilisant un dispositif de surveillance de puissance optique Download PDF

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Publication number
WO2014148511A1
WO2014148511A1 PCT/JP2014/057402 JP2014057402W WO2014148511A1 WO 2014148511 A1 WO2014148511 A1 WO 2014148511A1 JP 2014057402 W JP2014057402 W JP 2014057402W WO 2014148511 A1 WO2014148511 A1 WO 2014148511A1
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Prior art keywords
light
optical
optical fiber
amount
output
Prior art date
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Ceased
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PCT/JP2014/057402
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English (en)
Japanese (ja)
Inventor
真一 猪狩
多久島　裕一
旦 東谷
穣治 岡田
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National Institute of Advanced Industrial Science and Technology AIST
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National Institute of Advanced Industrial Science and Technology AIST
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Priority to JP2015506808A priority Critical patent/JP6116030B2/ja
Publication of WO2014148511A1 publication Critical patent/WO2014148511A1/fr
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06704—Housings; Packages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1312—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/3528—Non-linear optics for producing a supercontinuum
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
    • H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre

Definitions

  • the present invention relates to an optical power monitoring apparatus, an optical power monitoring method, and a laser generator using the optical power monitoring apparatus.
  • the present invention relates to an optical power monitoring device that measures the amount of light, an optical power monitoring method, and a laser generator using the optical power monitoring device.
  • Non-Patent Document 2 An optical device using the nonlinear optical effect of these optical fibers is called a fiber-type nonlinear optical device (see Non-Patent Document 2).
  • a light source that generates SC is practically used as a broadband light source that generates broadband light from the visible range to the near infrared (see, for example, Patent Documents 2 to 4).
  • the structure of an optical fiber used as a nonlinear optical medium is not limited to a single core fiber including one core (waveguide unit) in a single fiber as in the prior art, but a multicore fiber including a plurality of cores is used. Attempts have been made to improve performance and functions (see, for example, Patent Document 5 and Non-Patent Document 3).
  • a fiber-type nonlinear optical device when a fiber-type nonlinear optical device is used as a light source for such SC generation, it is necessary to measure the output power of the fiber-type nonlinear optical device for the purpose of monitoring the operation state or stabilizing control.
  • an optical power meter is used to extract a part of the power of an optical signal to be monitored using an optical fiber coupler.
  • the method of measuring the power using is generally used.
  • Patent Document 6 and Patent Document 7 disclose optical fiber couplers as described above. Therefore, for fiber-type nonlinear optical devices, a method is considered in which a part of the optical power output from the fiber-type nonlinear optical device is extracted using an optical fiber coupler and the output of the extracted optical power is measured. It is done.
  • Patent Document 8 and Patent Document 9 for example, a method is also proposed in which an optical signal propagating inside the optical fiber as a bending loss is intentionally taken out by bending the optical fiber with a small bending radius.
  • Patent Document 10 also proposes a method of intentionally taking out an optical signal propagating through the optical fiber by making a notch in the core / cladding portion of the optical fiber and performing refractive index matching. .
  • the optical fiber coupler has a branching ratio, that is, a ratio (transmittance) of the amount of light to be extracted varies depending on the wavelength, and generally changes periodically.
  • SC light supercontinuum light
  • SC light is broadband light
  • connection loss increases and the optical power of the broadband light is significantly reduced.
  • photonic crystal fibers used in fiber-type nonlinear optical devices have high inter-fiber connection loss, and the amount of light decreases when a branching optical device is inserted separately. And decrease the generation efficiency of nonlinearity. For this reason, it is difficult to branch part of the power in the fiber type nonlinear optical device.
  • the method of bending an optical fiber with a small bending radius intentionally creates leaked light, so there is a risk in the act of bending the optical fiber operating at high power, and excessive bending loss occurs. There is a possibility of causing great troubles such as heating by leaking light and breakage of the optical fiber.
  • the main object of the present invention is to detect a decrease in the output of the seed light source, there is no loss that occurs when measuring the amount of light in the optical fiber that can cause nonlinear effects, and from the seed light source.
  • An optical power monitoring apparatus is an optical power monitoring apparatus that measures the amount of pumping light output from a seed light source, except for an optical fiber connection that can cause a nonlinear optical effect on which pumping light is incident. It includes a photodetector arranged on the side surface, and when the pumping light is incident on the optical fiber, signal light having a wavelength different from that of the pumping light is generated due to the nonlinear optical effect of the optical fiber. It is an optical power monitoring device that measures the amount of excitation light emitted from a side surface and the amount of leakage light that is part of signal light with a photodetector, thereby measuring the amount of excitation light output from the seed light source.
  • an optical filter is inserted between the optical fiber and the photodetector to transmit the signal light included in the leakage light and to block the excitation light included in the leakage light.
  • an optical filter for blocking the signal light contained in the leaked light and transmitting the excitation light contained in the leaked light is provided between the optical fiber and the photodetector. It is preferable to measure the amount of excitation light output from the seed light source by inserting and measuring the amount of excitation light contained in the leaked light.
  • the photodetector includes a cover that covers a side surface other than the connection portion of the optical fiber, and a photodiode that is provided on the cover and faces the side surface other than the connection portion of the optical fiber.
  • the laser generator according to the present invention measures a seed light source that outputs excitation light, an optical fiber that can cause a nonlinear optical effect on the excitation light, and an amount of excitation light output from the seed light source.
  • the optical power monitoring method according to the present invention is an optical power monitoring method for measuring the amount of excitation light output from a seed light source, and the excitation output from the seed light source using the optical power monitoring device according to the present invention.
  • signal light having a wavelength different from that of the pumping light is generated by the nonlinear optical effect of the optical fiber, and pumping is radiated from a side surface other than the connection portion of the optical fiber.
  • This is an optical power monitoring method in which the amount of excitation light output from a seed light source is measured by measuring the amount of leakage light that is part of light and signal light.
  • the pumping light output from the seed light source is incident on the optical fiber that can cause the nonlinear optical effect, so that the signal light having a wavelength different from that of the pumping light is generated, and other than the connection portion of the optical fiber.
  • the amount of excitation light emitted from the seed light source is measured, and the amount of excitation light output from the seed light source is measured. Therefore, according to the present invention, since it is not necessary to use an optical fiber coupler, connection loss does not occur. As a result, even if the amount of excitation light is high, problems such as a significant reduction in the optical power of broadband light that is signal light are unlikely to occur. Furthermore, according to the present invention, since there is no need to bend the optical fiber, it is possible to suppress a major obstacle such as danger due to bending of the optical fiber, heating due to leaked light, or breakage of the optical fiber.
  • a decrease in the output of the seed light source can be detected, there is no loss that occurs when measuring the amount of light in the optical fiber that can cause a nonlinear effect, and the excitation output from the seed light source
  • An optical power monitoring device, an optical power monitoring method, and a laser generator using the optical power monitoring device that do not require a new optical device for measuring the amount of light can be obtained.
  • FIG. 1 It is an illustration figure which shows an example of the laser generator using the optical power monitoring apparatus concerning this invention. It is a figure which shows the optical power of each of excitation light and the excitation light amplified in the optical amplification part, and supercontinuum light (SC light). It is the disassembled perspective view seen from the one side of the photodetector used for the optical power monitoring apparatus shown in FIG. It is the disassembled perspective view seen from the other side of the photodetector used for the optical power monitoring apparatus shown in FIG. It is a graph of the result of having investigated the relationship between the voltage (V) of the output signal of a photodetector, and the output power (W) of SC light.
  • V voltage
  • W output power
  • (A) is an illustrative view showing a method of taking out part of the power of an optical signal to be monitored using an optical fiber coupler and measuring the power in an optical device or the like, and (b) is taken out. It is the figure which showed the relationship of the transmittance
  • FIG. 1 is an illustrative view showing an example of an embodiment of a configuration of a laser generator using an optical power monitoring device.
  • the laser generator according to the present invention is, for example, a fiber-type nonlinear optical device for outputting broadband supercontinuum light (SC light) that is signal light.
  • SC light broadband supercontinuum light
  • the laser generator 10 shown in FIG. 1 includes a short pulse light source 20, an optical amplifier 30, and an optical fiber 40.
  • the laser generator 10 shown in FIG. 1 includes a short pulse light source 20, an optical amplifier 30, and an optical fiber 40.
  • the short pulse light source 20 is a seed light source for outputting the excitation light P1.
  • the short pulse light source 20 includes an output fiber 22 that is coupled to the short pulse light source 20 and outputs the excitation light P ⁇ b> 1 output from the short pulse light source 20.
  • the short pulse light source 20 is a picosecond short pulse light source using a fiber laser, for example, and outputs pulsed excitation light P1 to the output fiber 22.
  • the pulse width of the excitation light P1 is, for example, 5 psec, and the arrival interval of the pulses of the excitation light P1 is 20 nsec.
  • a single mode optical fiber is used as the output fiber 22.
  • the pumping light P1 output from the short pulse light source 20 is output to the optical amplifying unit 30 coupled to the output fiber 22.
  • the optical amplifier 30 is for amplifying the pumping light P1 output from the short pulse light source 20 and compressing the pulsed light as necessary.
  • the optical amplifier 30 includes an amplification output optical fiber 32 that is coupled to the optical amplifier 30 and outputs amplified pumping light P2 output from the optical amplifier 30.
  • the optical amplifier 30 amplifies the excitation light P1 incident from the short pulse light source 20 via the output fiber 22 to a higher power and outputs the excitation light P2, and the output excitation light P2 is amplified output light. Output to the fiber 32.
  • an amplification optical fiber or an optical crystal to which ytterbium (Yb) or erbium (Er) ions are added is used for optical amplification.
  • Yb ytterbium
  • Er erbium
  • a double clad optical fiber is used as an amplification optical fiber for performing optical amplification used in the optical amplifier 30.
  • the amplified pumping light P2 output from the optical amplifier 30 is output to the optical fiber 40 that is coupled to the amplification output optical fiber 32 via the connection portion 33.
  • the pumping light P2 output from the optical amplifier 30 to the optical fiber 40 via the connection unit 33 is preferably a high-intensity optical signal of ultrashort pulsed light.
  • the excitation light P2 has a short time width and high peak power as pulse light.
  • the amplified pumping light P2 is incident on the optical fiber 40 in a pulse form from the short pulse light source 20 through the optical amplifier 30 and the connecting portion 33, so that the nonlinearity of the optical fiber 40 is reached.
  • a pulse train of SC light P3 that is signal light having a wavelength (broadband) different from that of the excitation light P1 or the excitation light P2 generated by the optical effect is generated.
  • leakage light P4 that is a part of the excitation light P2 and the SC light P3 is emitted from the side surface other than the connection portion of the optical fiber 40.
  • FIG. 2 shows the pumping light P1, the pumping light P2 amplified by the optical amplifier 30, and the SC light P3 generated by the nonlinear effect of the optical fiber 40.
  • the SC light P3 is a broadband light having a wavelength of 450 nm to 2000 nm.
  • the excitation light P1 and the excitation light P2 shown in FIG. 2 are optical fibers doped with ytterbium (Yb) ions, the center wavelength is 1.03 ⁇ m. When an optical fiber to which erbium (Er) ions are added is used, the center wavelength is around 1.5 ⁇ m.
  • the optical fiber 40 is an optical fiber for causing a nonlinear optical effect.
  • a photonic crystal fiber which is a silica-based optical fiber or a step index fiber having a small core diameter is used.
  • a photonic crystal fiber realizes optical signal confinement (waveguide) by periodic holes. It should be noted that such a photonic crystal fiber has a large loss when connected by fusion.
  • the structure of the optical fiber 40 is a single-core fiber including one core (waveguide portion) in one fiber or a multi-core fiber including a plurality of cores.
  • the laser generator 10 further includes an optical power monitoring device 50.
  • the optical power monitoring device 50 is, for example, for measuring the amount of leaked light P4 radiated from a side surface other than the connection portion of the optical fiber 40 that can cause a nonlinear optical effect.
  • the optical power monitoring device 50 includes a photodetector 52.
  • the photodetector 52 is disposed on a side surface other than the connection portion of the optical fiber 40 that can cause a nonlinear optical effect. By measuring the light amount of the leaked light P4 emitted from the side surface of the optical fiber 40 by the photodetector 52, the light amount of the excitation light P1 output from the short pulse light source 20 is measured.
  • the photodetector 52 includes a base cover 54 and a main body cover 56 made of a metal having good thermal conductivity, for example, as covers covering the side surfaces of the optical fiber 40.
  • the base cover 54 and the main body cover 56 are disposed on both sides of the side surface of the optical fiber 40 so as to sandwich the side surface of the optical fiber 40.
  • the periphery of the optical fiber 40 is covered and shielded by the base cover 54 and the main body cover 56 in order to block ambient light from outside the measurement portion on the side surface of the optical fiber 40.
  • the main body cover 56 is formed with a linear groove 58 having a width wider than the width of the optical fiber 40 from one end to the other end of the main surface facing the optical fiber 40.
  • Cushion materials 60 and 60 made of a relatively soft material are provided on both side portions in the groove 58 of the main body cover 56, respectively.
  • the cushion members 60 and 60 are for preventing the optical fiber 40 from being damaged when the connection portion 33 of the optical fiber 40 is sandwiched between the covers 54 and 56.
  • the main body cover 56 is formed with, for example, a circular through hole 62 in the center portion in the groove 58.
  • the through hole 62 is a hole for arranging a photodiode 66 described later.
  • a substrate 64 is provided outside the main body cover 56 of the photodetector 52.
  • the substrate 64 is fixed to the main body cover 56 with a fixing tool such as a screw, and the main body cover 56 is also fixed to the base cover 54 with a fixing tool such as a screw.
  • the photodetector 52 further includes a photodiode 66.
  • the photodiode 66 is attached to the substrate 64 and is disposed in the through hole 62 of the main body cover 56.
  • the photodiode 66 is disposed so as to face the side surface of the optical fiber 40. Therefore, the light quantity of the leakage light P4 from the side surface of the optical fiber 40 can be measured by the photodiode 66 as a light detection signal.
  • the photodiode 66 on the side surface of the optical fiber 40 is blocked by the covers 54 and 56, the amount of the leaked light P4 from the measurement portion on the side surface of the optical fiber 40 is accurately determined. Can be measured.
  • the substrate 64 is mounted with an electronic circuit (not shown) for performing signal processing such as amplification or noise removal of the light detection signal from the photodiode 66, and the electronic circuit is connected to the connection wiring 68. Electrically connected. Therefore, the light detection sensitivity and accuracy of the light detection signal from the photodiode 66 can be improved. In this manner, a light detection signal corresponding to the light power incident on the photodiode 66 can be output from the light detector 52.
  • the output signal from the photodetector 52 is expressed as a voltage magnitude, for example.
  • the device is not limited to the photodiode 66, and an optical device that reacts to the optical power may be used instead of the photodiode 66.
  • the photodetector 52 is electrically connected to the control unit 70 via the connection wiring 68.
  • the control unit 70 is for calculating the light amount of the excitation light P1 output from the short pulse light source 20 based on the signal output from the photodetector 52. Furthermore, the control unit 70 has a display unit (not shown) for displaying the calculated light quantity.
  • control unit 70 for example, the following control is performed.
  • the control unit 70 multiplies the output signal of the photodetector 52 indicating the light amount of the leaked light P4 based on each of the examined relationships to multiply the output light signal of the excitation light P1 or the excitation light P2 by a coefficient. Calculate. If it does so, each light quantity of the excitation light P1 and the excitation light P2 can be obtained from the light quantity of the leakage light P4.
  • the optical power monitoring device 50 it is possible to monitor the output of the optical power of the laser generator 10 or the short pulse light source 20.
  • the control unit 70 calculates the light amount of the SC light P3 by multiplying the output signal of the photodetector 52 indicating the light amount of the leaked light P4 by a coefficient based on the relationship between the two examined. Then, the amount of SC light P3 can be obtained from the amount of leaked light P4.
  • the light amount of the excitation light P1 output from the short pulse light source 20 is reduced, the light amount of the SC light obtained by the calculation by the above method is also reduced. If it does so, it can be judged that the light quantity of the excitation light P1 output from the short pulse light source 20 is falling. In this way, by using the optical power monitoring device 50, the output of the optical power of the laser generator 10 can be monitored.
  • the SC light P3 having a wavelength different from that of the pumping light P1 is generated by the pumping light P1 output from the short pulse light source 20 entering the optical fiber 40 that can cause a nonlinear optical effect.
  • the amount of excitation light P1 output from the short pulse light source 20 is measured by measuring the amount of excitation light emitted from the side surface other than the connection portion of the optical fiber 40 and the amount of leakage light P4 that is part of the SC light. Can be measured. Therefore, the laser generator 10 can monitor a decrease in the light amount of the excitation light P1 output from the short pulse light source 20.
  • this laser generator 10 there is no need to add an optical device such as an optical fiber coupler, so that no connection loss occurs. For this reason, even if the amount of excitation light is high, it is difficult to cause problems such as a significant reduction in the optical power of broadband light.
  • this laser generator 10 since there is no need to bend the optical fiber, there is no risk of bending due to bending of the optical fiber and leakage light without mechanical deformation as in the case where excessive loss is produced by bending. Large obstacles such as heating by heating and optical fiber breakage can be suppressed, and it is safe.
  • pulsed light having a center wavelength of 1040 nm and a pulse width of 5 psec was used as the pumping light P1
  • a Yb-doped optical fiber amplifier was used as the optical amplifier 30.
  • a photonic crystal fiber was used as the optical fiber 40 for generating the SC light P3.
  • the photodiode 66 used inside the photodetector 52 a photodiode mainly made of silicon was used.
  • the relationship between the voltage (V) of the output signal of the photodetector 52 and the output power (W) of the SC light P3 was examined as follows. That is, while changing the output power of the optical amplifier 30 to change the power of the pumping light P2 and the SC light P3, the output power of the SC light P3, which is the output of the optical fiber 40, is measured. The voltage of the output signal was measured. Then, using an electric amplifier in an electronic circuit mounted on the substrate 64, the signal of the photodiode 66 was converted into a voltage signal, and the output signal of the photodetector 52 was taken out.
  • FIG. 5 shows a graph of the results of examining the relationship between the voltage (V) of the output signal of the photodetector 52 and the output power (W) of the SC light P3.
  • V voltage
  • W output power
  • the optical power monitoring device 50 according to the above-described embodiment, only the light amount of the leaked light P4 is measured, but the present invention is not limited to this, and the optical power between the photodiode 66 and the optical fiber 40 is not limited.
  • a filter (not shown) may be inserted, and the leaked light P4 may be measured through this optical filter.
  • the excitation light included in the leakage light P4 may be used by using an optical filter that efficiently transmits the excitation light included in the leakage light P4 and blocks the SC light included in the leakage light P4. Only the amount of light may be measured.
  • the photodetector 52 obtained by measuring the amount of SC light included in the leaked light P4 measured through the optical filter using the photodiode 66.
  • the amount of the SC light P3 is calculated by examining in advance the relationship between the output signal voltage and the output power of the SC light P3 in the optical fiber 40.
  • the laser generator 10 includes the optical amplifying unit 30 for amplifying the excitation light P1, but the present invention is not limited to this and may be amplified by a different optical device or the like.
  • optical power monitoring device and the laser generator using the optical power monitoring device according to the present invention can be suitably used as a sensor light source, a spectral light source, a light source for optical component inspection, or an optical power monitoring device thereof.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Lasers (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

La présente invention porte sur un dispositif de surveillance de puissance optique, un procédé de surveillance de puissance optique et un dispositif de génération laser utilisant le dispositif de surveillance optique apte à détecter une réduction dans la sortie provenant d'une source de lumière pulsée courte, sans générer de perte lors de la mesure de la quantité de lumière, et sans la nécessité de l'ajout d'un nouveau dispositif optique destiné à mesurer une lumière d'excitation délivrée en sortie par une source de lumière d'amorçage. Le dispositif (50) de surveillance de puissance optique comprend un détecteur (52) optique agencé sur une surface d'une fibre (40) optique qui reçoit une lumière d'excitation délivrée en sortie par une source (1) de lumière pulsée courte et qui peut produire un effet optique non linéaire, ledit détecteur (52) optique étant agencé sur une surface latérale de la fibre (40) optique autre qu'une partie connexion. Lorsque la lumière d'excitation est incidente sur la fibre (40) optique, une lumière SC ayant une longueur d'onde différente de celle de la lumière d'excitation est générée en raison de l'effet optique non linéaire de la fibre (40) optique, et le dispositif (50) de surveillance optique mesure la quantité de lumière d'excitation délivrée en sortie par la source (20) de lumière pulsée courte par la mesure de la quantité de lumière de fuite émise par la surface latérale de la fibre (40) optique autre que la partie connexion, ladite lumière de fuite étant une partie de la lumière d'excitation et de la lumière SC.
PCT/JP2014/057402 2013-03-18 2014-03-18 Dispositif de surveillance de puissance optique, procédé de surveillance de puissance optique et dispositif de génération laser utilisant un dispositif de surveillance de puissance optique Ceased WO2014148511A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015506808A JP6116030B2 (ja) 2013-03-18 2014-03-18 光パワー監視装置、光パワー監視方法および光パワー監視装置を用いたレーザ発生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-054806 2013-03-18
JP2013054806 2013-03-18

Publications (1)

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CN106124047A (zh) * 2016-06-14 2016-11-16 深圳市创鑫激光股份有限公司 一种激光检测系统
WO2018124038A1 (fr) * 2016-12-27 2018-07-05 株式会社フジクラ Appareil de détection, laser à fibre et système laser à fibre
CN109342804A (zh) * 2018-10-10 2019-02-15 武汉锐科光纤激光技术股份有限公司 一种光电二极管监控保护装置
RU2834174C1 (ru) * 2024-10-20 2025-02-04 Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр "Институт общей физики им. А.М. Прохорова Российской академии наук" (ИОФ РАН) Комплекс контроля режимов генерации ультракоротких импульсов лазеров
EP4358322A4 (fr) * 2021-07-21 2025-05-07 Hamamatsu Photonics K.K. Dispositif de source de lumière

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JP2015010093A (ja) * 2013-07-01 2015-01-19 ユニバーサル ディスプレイ コーポレイション 有機金属錯体のための補助配位子
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CN106124047A (zh) * 2016-06-14 2016-11-16 深圳市创鑫激光股份有限公司 一种激光检测系统
WO2018124038A1 (fr) * 2016-12-27 2018-07-05 株式会社フジクラ Appareil de détection, laser à fibre et système laser à fibre
JP2018105768A (ja) * 2016-12-27 2018-07-05 株式会社フジクラ 検出装置、ファイバレーザ、ファイバレーザシステム
CN109342804A (zh) * 2018-10-10 2019-02-15 武汉锐科光纤激光技术股份有限公司 一种光电二极管监控保护装置
EP4358322A4 (fr) * 2021-07-21 2025-05-07 Hamamatsu Photonics K.K. Dispositif de source de lumière
RU2834174C1 (ru) * 2024-10-20 2025-02-04 Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр "Институт общей физики им. А.М. Прохорова Российской академии наук" (ИОФ РАН) Комплекс контроля режимов генерации ультракоротких импульсов лазеров

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