CN106646733A - Elliptical polarization maintaining optical fiber and preparation method therefor - Google Patents
Elliptical polarization maintaining optical fiber and preparation method therefor Download PDFInfo
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- CN106646733A CN106646733A CN201510718656.1A CN201510718656A CN106646733A CN 106646733 A CN106646733 A CN 106646733A CN 201510718656 A CN201510718656 A CN 201510718656A CN 106646733 A CN106646733 A CN 106646733A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 72
- 230000010287 polarization Effects 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000010410 layer Substances 0.000 claims abstract description 140
- 238000005253 cladding Methods 0.000 claims abstract description 62
- 239000012792 core layer Substances 0.000 claims abstract description 43
- 239000000835 fiber Substances 0.000 claims abstract description 36
- 238000000151 deposition Methods 0.000 claims description 44
- 230000008021 deposition Effects 0.000 claims description 42
- 238000005530 etching Methods 0.000 claims description 34
- 229910003910 SiCl4 Inorganic materials 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 claims description 24
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000010453 quartz Substances 0.000 claims description 14
- 208000025174 PANDAS Diseases 0.000 claims description 12
- 208000021155 Paediatric autoimmune neuropsychiatric disorders associated with streptococcal infection Diseases 0.000 claims description 12
- 240000004718 Panda Species 0.000 claims description 12
- 235000016496 Panda oleosa Nutrition 0.000 claims description 12
- 229910052681 coesite Inorganic materials 0.000 claims description 11
- 229910052906 cristobalite Inorganic materials 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 229910052682 stishovite Inorganic materials 0.000 claims description 11
- 229910052905 tridymite Inorganic materials 0.000 claims description 11
- 229910015845 BBr3 Inorganic materials 0.000 claims description 10
- 229910006113 GeCl4 Inorganic materials 0.000 claims description 10
- 229910019213 POCl3 Inorganic materials 0.000 claims description 10
- ILAHWRKJUDSMFH-UHFFFAOYSA-N boron tribromide Substances BrB(Br)Br ILAHWRKJUDSMFH-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- GFISHBQNVWAVFU-UHFFFAOYSA-K terbium(iii) chloride Chemical compound Cl[Tb](Cl)Cl GFISHBQNVWAVFU-UHFFFAOYSA-K 0.000 claims description 10
- IEXRMSFAVATTJX-UHFFFAOYSA-N tetrachlorogermane Chemical compound Cl[Ge](Cl)(Cl)Cl IEXRMSFAVATTJX-UHFFFAOYSA-N 0.000 claims description 10
- 230000004323 axial length Effects 0.000 claims description 8
- 238000012946 outsourcing Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 5
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 abstract description 2
- 230000005672 electromagnetic field Effects 0.000 abstract description 2
- 238000005491 wire drawing Methods 0.000 abstract 3
- 230000008602 contraction Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005408 paramagnetism Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/024—Optical fibres with cladding with or without a coating with polarisation maintaining properties
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01853—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02709—Polarisation maintaining fibres, e.g. PM, PANDA, bi-refringent optical fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02745—Fibres having rotational spin around the central longitudinal axis, e.g. alternating +/- spin to reduce polarisation mode dispersion
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03694—Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/12—Non-circular or non-elliptical cross-section, e.g. planar core
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/18—Axial perturbations, e.g. in refractive index or composition
- C03B2203/20—Axial perturbations, e.g. in refractive index or composition helical
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/30—Polarisation maintaining [PM], i.e. birefringent products, e.g. with elliptical core, by use of stress rods, "PANDA" type fibres
- C03B2203/302—Non-circular core cross-sections
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/06—Rotating the fibre fibre about its longitudinal axis
- C03B2205/07—Rotating the preform about its longitudinal axis
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- Dispersion Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention relates to an elliptical polarization maintaining optical fiber and a preparation method therefor. The section structure of the elliptical polarization maintaining optical fiber sequentially comprises an elliptical fiber core layer, an inner cladding layer wrapping the fiber core layer, a stress action region layer wrapping the inner cladding layer and an outer cladding layer wrapping the stress action region layer from the inside to the outside. The fiber core layer is also doped with Tb2O3 (800-1000ppm) and CeO2 (250-300ppm). The elliptical polarization maintaining optical fiber is prepared through the following steps: (1), preparing a corresponding optical fiber prefabricated rod according to the requirements; (2), fixing the prepared optical fiber prefabricated rod on a rotating wiredrawing machine, and operating the rotating wiredrawing machine for wiredrawing, thereby obtaining the elliptical polarization maintaining optical fiber. Compared with the prior art, the prepared optical fiber is higher in Faraday effect, and is very high in radiation resistance performance. A manufactured electromagnetic field detector is high in precision, uses a short optical fiber, and is suitable for a strong radiation environment.
Description
Technical field
The present invention relates to special optical fiber field, more particularly, to a kind of oval polarization maintaining optical fibre and preparation method thereof.
Background technology
The testing equipment of existing overhead electrical network is heavy, outmoded, precision is low.Annoying industry experts, the scholar in the whole world.
Jing demonstrations have round polarization maintaining optical fibre only and can transmit circularly polarized light, anti-interference, there is very strong Faraday effect.Use this optical fiber
Make fibre-optic current biography device (OCT) and may replace old-fashioned instrumentation, and small volume, high precision.But it is because circle
The preparation method of polarization maintaining optical fibre is more difficult, and the yellow grand good academician of China just leads team to be researched and developed from nineteen ninety,
So far very small amount " circle is protected inclined " sample fiber is only made.At present, most round polarization maintaining optical fibres derive from into
Mouthful, price is prohibitively expensive.In the market, often circle polarization maintaining optical fibre is substituted with low birefringent fiber and prepares current sense
Device, but low birefringent fiber is extremely sensitive to interference.
The content of the invention
The purpose of the present invention is exactly the defect in order to overcome above-mentioned prior art to exist and provides a kind of radiation-resistant ellipse
Circle polarization maintaining optical fibre and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of oval polarization maintaining optical fibre, the cross section structure of the polarization maintaining optical fibre is followed successively by from the inside to surface the fibre core of ovalize
Layer, wraps up the inner cladding of the core layer, wraps up the stress region layer of the inner cladding, and should described in parcel
Power acts on the surrounding layer of region layer, also doped with the Tb of 800～1000ppm in described core layer2O3With
The CeO of 250～300ppm2。
The circularity of described core layer is 60～90%.
A diameter of 120～130 μm of described oval polarization maintaining optical fibre, wherein, the long axial length and interior bag of core layer
The diameter ratio of layer, stress region layer and surrounding layer is 4:40:100:125.
A kind of preparation method of oval polarization maintaining optical fibre, comprises the following steps：
(1) it is passed through SiCl toward in quartzy base tube4And O2, heating response, and deposition obtains SiO2Prefabricated rods outsourcing
Layer；
(2) after prefabricated rods outer cladding deposition is good, it is passed through SiCl4、BBr3And O2, heating is reacted, pre-
SiO is deposited on rod surrounding layer processed2/B2O3Prefabricated rods stress region layer；
(3) etching gas are passed through, with the quartzy base tube center of circle as symmetric points, etching removes prefabricated rods stress region layer pair
Claim the part stressed zone on both sides so that the symmetrical both sides of the prefabricated rods stress region layer of remainder are mutually not connected to；
(4) after the completion of etching, it is passed through SiCl4、POCl3、SF6And O2, heating response, deposition obtain prefabricated
Rod inner cladding, the stressed zone layer segment filling that prefabricated rods inner cladding first removes etching in deposition process is full, then
Deposit in the stressed zone layer surface for do not etch removing；
(5) after the completion of prefabricated rods inner cladding deposition, it is passed through SiCl4、GeCl4、TbCl3、CeCl4And O2, plus
Heat is reacted, and deposition obtains rod sandwich layer；
(6) after the completion of depositing, heated quartz base tube is sintered to each layer, that is, shrink that to obtain elliptical fiber prefabricated
Rod；
(7) it is obtained elliptical fiber prefabricated rods are fixed on spin draw machine, and make its backspin end deviation
Ri<50 μm, operation spin draw machine obtains oval polarization maintaining optical fibre to elliptical fiber preform.
SiCl described in step (1)4And O2Intake mol ratio be (1～1.2):1, reaction temperature is
1850℃；
SiCl described in step (2)4、BBr3And O2Intake mol ratio be (78～80)：(32～33)：
150, its reaction temperature is 1650～1850 DEG C；
Etching gas described in step (3) are SF6, etching temperature is 1450～1850 DEG C, prefabricated after etching
Rod stress region layer is in butterfly junction type or panda type；
SiCl described in step (4)4、POCl3、SF6And O2Intake mol ratio be (30～40)：
(3～5)：1：(80～100), its heating response temperature is 1850～2050 DEG C；
SiCl described in step (5)4、GeCl4、TbCl3、CeCl4And O2Intake mol ratio be (2～3)：
1：(0.1～0.2)：(0.035～0.06)：(10～20), its heating response temperature is 1850～2050 DEG C；
Sintering temperature described in step (6) is 2250～2450 DEG C.
When the prefabricated rods stress region layer after etching is in butterfly junction type；Obtained elliptical fiber prefabricated rods it is a diameter of
15～18mm, the rotary speed of spin draw machine is 1000r/min, and rotation intercept is 5～6mm, and drawing speed is
5～6m/min；
When the prefabricated rods stress region layer after etching be in panda type when, obtained elliptical fiber prefabricated rods it is a diameter of
40～45mm, the rotary speed of spin draw machine is 2000r/min, and rotation intercept is 4～5mm, and drawing speed is
8～10m/min.
In step (1)～(2) and step (4)～(5), the prefabricated rods surrounding layer of deposition, prefabricated rods stress
The ratio of the thickness of region layer, prefabricated rods inner cladding and rod sandwich layer is (1.2～1.5)：(3～5)：2：(0.3～0.4).
The present invention in preparation process, by the optical fiber prefabricating for first preparing butterfly junction type stressed zone or panda type stressed zone
Rod, and the inner cladding of prefabricated rods is SiO2/P2O5/ F inner claddings, the Young's modulus with the stress region layer of special construction
Difference is relatively large, so that preform is during shaping is shunk, rod sandwich layer still can keep higher
Circularity, by being passed through Tb in preparation process3+And Ce4+, so as to deposit corresponding oxide Tb in rod sandwich layer2O3
And CeO2, the Verdet constant for drawing the oval polarization maintaining optical fibre for obtaining effectively is increased, improve oval polarization maintaining optical fibre
Paramagnetism, and then improve using the precision of the instrumentation obtained in oval polarization maintaining optical fibre, while allowing polarization maintaining optical fibre
Produce certain capability of resistance to radiation.
Compared with prior art, the obtained optical fiber of the present invention has higher Faraday effect and very strong radioresistance
Performance, made by electromagnetic field detection instrument high precision, with fibre it is short, be suitable for strong radiation environment under work.
Description of the drawings
Fig. 1 is the structural representation of obtained oval polarization maintaining optical fibre in embodiment 1；
Fig. 2 is the graph of a relation of the Verdet constant of oval polarization maintaining optical fibre obtained in embodiment 1 and wavelength；
Fig. 3 is the graph of a relation of the Verdet constant of oval polarization maintaining optical fibre obtained in embodiment 1 and temperature；
In figure, 1- surrounding layers, 2- stress region layer, 3- inner claddings, 4- core layers.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in detail with specific embodiment.
Embodiment 1
A kind of oval polarization maintaining optical fibre, its structure as shown in figure 1, the cross section structure of the polarization maintaining optical fibre from the inside to surface successively
For the core layer 4 of ovalize, the inner cladding 3 of the core layer 4 is wrapped up, wrap up the stress of the inner cladding 3
Effect region layer 2, and the surrounding layer 1 of the stress region layer 2 is wrapped up, also adulterate in described core layer 4
There is the Tb of 800ppm2O3With the CeO of 250ppm2, the circularity of described core layer 4 is 60%, and described is ellipse
A diameter of 120 μm of circle polarization maintaining optical fibre, wherein, the long axial length and inner cladding 3 of core layer 4, stress area
The diameter ratio of layer 2 and surrounding layer 1 is 4:40:100:125.
The preparation method of above-mentioned oval polarization maintaining optical fibre, comprises the following steps：
(1) toward in quartz base tube in molar ratio 1:1 is passed through SiCl4And O2, reaction is heated to, and deposition is obtained
SiO2Prefabricated rods surrounding layer；
(2) after prefabricated rods outer cladding deposition is good, in molar ratio 78：32：150 are passed through SiCl4、BBr3And O2,
It is heated to 1650 DEG C to be reacted, on prefabricated rods surrounding layer SiO is deposited2/B2O3Prefabricated rods stress region layer；
(3) it is passed through etching gas SF6, with the quartzy base tube center of circle as symmetric points, remove in 1450～1850 DEG C of etchings
The part stressed zone on the symmetrical both sides of prefabricated rods stress region layer so that symmetrical the two of the prefabricated rods stress region layer of remainder
Side is mutually not connected to and in panda type；
(4) after the completion of etching, in molar ratio 30：3：1：80 are passed through SiCl4、POCl3、SF6And O2, plus
Heat to 1850 DEG C of reactions, deposition obtain SiO2/P2O5/ F prefabricated rods inner claddings；
(5) after the completion of prefabricated rods inner cladding deposition, in molar ratio 2：1：0.1：0.035：10 are passed through SiCl4、
GeCl4、TbCl3、CeCl4And O2, it is heated to 1850 DEG C and is reacted, deposition obtains rod sandwich layer；
(6) deposit after the completion of, now, prefabricated rods surrounding layer, prefabricated rods stress region layer, prefabricated rods inner cladding and
The ratio of the thickness of rod sandwich layer is 1.2：3：2：0.3, heated quartz base tube to 2250 DEG C are sintered to each layer, i.e.,
Contraction obtains elliptical fiber prefabricated rods, its a diameter of 40mm,；
(7) it is obtained elliptical fiber prefabricated rods are fixed on spin draw machine, and make its backspin end deviation
Ri<50 μm, run spin draw machine so that the rotary speed of spin draw machine is 2000r/min, rotates intercept
For 4mm, drawing speed is 8m/min, to elliptical fiber preform, that is, obtains the oval of panda type and protects inclined
Optical fiber.
Its application performance under different temperatures and wavelength is tested to the oval polarization maintaining optical fibre of obtained panda type, as a result
As shown in Figures 2 and 3, it is known that, in order to strengthen faraday (faraday) effect of polarization maintaining optical fibre, Ying Jinke
Can use under shortwave and low temperature.
Embodiment 2
A kind of oval polarization maintaining optical fibre, the cross section structure of the polarization maintaining optical fibre is followed successively by from the inside to surface the core layer of ovalize
4, the inner cladding 3 of the core layer 4 is wrapped up, wrap up the stress region layer 2 of the inner cladding 3, and parcel
The surrounding layer 1 of the stress region layer 2, also doped with the Tb of 1000ppm in described core layer 42O3
With the CeO of 300ppm2, the circularity of described core layer 4 is 90%, the diameter of described oval polarization maintaining optical fibre
For 130 μm, wherein, the long axial length and inner cladding 3 of core layer 4, stress region layer 2 and surrounding layer 1
Diameter ratio is 4:40:100:125.
The preparation method of above-mentioned oval polarization maintaining optical fibre, comprises the following steps：
(1) toward in quartz base tube in molar ratio 1.2:1 is passed through SiCl4And O2, reaction is heated to, and deposition is obtained
SiO2Prefabricated rods surrounding layer；
(2) after prefabricated rods outer cladding deposition is good, in molar ratio 80：32：150 are passed through SiCl4、BBr3And O2,
It is heated to 1850 DEG C to be reacted, on prefabricated rods surrounding layer SiO is deposited2/B2O3Prefabricated rods stress region layer；
(3) it is passed through etching gas SF6, with the quartzy base tube center of circle as symmetric points, remove in 1850 DEG C of etchings prefabricated
The part stressed zone on the symmetrical both sides of rod stress region layer so that the symmetrical both sides of the prefabricated rods stress region layer of remainder are mutual
It is not connected to and in panda type；
(4) after the completion of etching, in molar ratio 40：5：1：100 are passed through SiCl4、POCl3、SF6And O2,
2050 DEG C of reactions are heated to, deposition obtains prefabricated rods inner cladding；
(5) after the completion of prefabricated rods inner cladding deposition, in molar ratio 3：1：0.2：0.06：20 are passed through SiCl4、
GeCl4、TbCl3、CeCl4And O2, it is heated to 2050 DEG C and is reacted, deposition obtains rod sandwich layer；
(6) deposit after the completion of, now, prefabricated rods surrounding layer, prefabricated rods stress region layer, prefabricated rods inner cladding and
The ratio of the thickness of rod sandwich layer is 1.5：3：2：0.4, heated quartz base tube to 2450 DEG C are sintered to each layer, i.e.,
Contraction obtains elliptical fiber prefabricated rods, its a diameter of 42mm,；
(7) it is obtained elliptical fiber prefabricated rods are fixed on spin draw machine, and make its backspin end deviation
Ri<50 μm, run spin draw machine so that the rotary speed of spin draw machine is 2000r/min, rotates intercept
For 5mm, drawing speed is 10m/min, to elliptical fiber preform, that is, obtains the oval guarantor of panda type
Polarisation is fine.
Embodiment 3
A kind of oval polarization maintaining optical fibre, the cross section structure of the polarization maintaining optical fibre is followed successively by from the inside to surface the core layer of ovalize
4, the inner cladding 3 of the core layer 4 is wrapped up, wrap up the stress region layer 2 of the inner cladding 3, and parcel
The surrounding layer 1 of the stress region layer 2, also doped with the Tb of 900ppm in described core layer 42O3With
The CeO of 275ppm2, the circularity of described core layer 4 is 75%, described oval polarization maintaining optical fibre it is a diameter of
125 μm, wherein, the long axial length and inner cladding 3 of core layer 4, stress region layer 2 and surrounding layer 1 it is straight
The ratio in footpath is 4:40:100:125.
The preparation method of above-mentioned oval polarization maintaining optical fibre, comprises the following steps：
(1) toward in quartz base tube in molar ratio 1.1:1 is passed through SiCl4And O2, reaction is heated to, and deposition is obtained
SiO2Prefabricated rods surrounding layer；
(2) after prefabricated rods outer cladding deposition is good, in molar ratio 79：32.5：150 are passed through SiCl4、BBr3With
O2, it is heated to 1750 DEG C and is reacted, deposit SiO on prefabricated rods surrounding layer2/B2O3Prefabricated rods stress region layer；
(3) it is passed through etching gas SF6, with the quartzy base tube center of circle as symmetric points, remove in 1650 DEG C of etchings prefabricated
The part stressed zone on the symmetrical both sides of rod stress region layer so that the symmetrical both sides of the prefabricated rods stress region layer of remainder are mutual
It is not connected to and in panda type；
(4) after the completion of etching, in molar ratio 35：4：1：90 are passed through SiCl4、POCl3、SF6And O2, plus
Heat to 1850～2050 DEG C of reactions, deposition obtain prefabricated rods inner cladding；
(5) after the completion of prefabricated rods inner cladding deposition, in molar ratio 2.5：1：0.15：0.045：15 are passed through SiCl4、
GeCl4、TbCl3、CeCl4And O2, it is heated to 2000 DEG C and is reacted, deposition obtains rod sandwich layer；
(6) deposit after the completion of, now, prefabricated rods surrounding layer, prefabricated rods stress region layer, prefabricated rods inner cladding and
The ratio of the thickness of rod sandwich layer is 1.4：4：2：0.35, heated quartz base tube to 2350 DEG C are sintered to each layer,
Shrink and obtain elliptical fiber prefabricated rods, its a diameter of 45mm,；
(7) it is obtained elliptical fiber prefabricated rods are fixed on spin draw machine, and make its backspin end deviation
Ri<50 μm, run spin draw machine so that the rotary speed of spin draw machine is 2000r/min, rotates intercept
For 4.5mm, drawing speed is 9m/min, to elliptical fiber preform, that is, obtains the oval guarantor of panda type
Polarisation is fine.
Embodiment 4
A kind of oval polarization maintaining optical fibre, its structure as shown in figure 1, the cross section structure of the polarization maintaining optical fibre from the inside to surface successively
For the core layer 4 of ovalize, the inner cladding 3 of the core layer 4 is wrapped up, wrap up the stress of the inner cladding 3
Effect region layer 2, and the surrounding layer 1 of the stress region layer 2 is wrapped up, also adulterate in described core layer 4
There is the Tb of 800ppm2O3With the CeO of 250ppm2, the circularity of described core layer 4 is 60%, and described is ellipse
A diameter of 120 μm of circle polarization maintaining optical fibre, wherein, the long axial length and inner cladding 3 of core layer 4, stress area
The diameter ratio of layer 2 and surrounding layer 1 is 4:40:100:125.
The preparation method of above-mentioned oval polarization maintaining optical fibre, comprises the following steps：
(1) toward in quartz base tube in molar ratio 1:1 is passed through SiCl4And O2, reaction is heated to, and deposition is obtained
SiO2Prefabricated rods surrounding layer；
(2) after prefabricated rods outer cladding deposition is good, in molar ratio 78：32：150 are passed through SiCl4、BBr3And O2,
It is heated to 1650 DEG C to be reacted, on prefabricated rods surrounding layer SiO is deposited2/B2O3Prefabricated rods stress region layer；
(3) it is passed through etching gas SF6, with the quartzy base tube center of circle as symmetric points, remove in 1450～1850 DEG C of etchings
The part stressed zone on the symmetrical both sides of prefabricated rods stress region layer so that symmetrical the two of the prefabricated rods stress region layer of remainder
Side is mutually not connected to and in butterfly junction type；
(4) after the completion of etching, in molar ratio 30：3：1：80 are passed through SiCl4、POCl3、SF6And O2, plus
Heat to 1850 DEG C of reactions, deposition obtain SiO2/P2O5/ F prefabricated rods inner claddings；
(5) after the completion of prefabricated rods inner cladding deposition, in molar ratio 2：1：0.1：0.035：10 are passed through SiCl4、
GeCl4、TbCl3、CeCl4And O2, it is heated to 1850 DEG C and is reacted, deposition obtains rod sandwich layer；
(6) deposit after the completion of, now, prefabricated rods surrounding layer, prefabricated rods stress region layer, prefabricated rods inner cladding and
The ratio of the thickness of rod sandwich layer is 1.2：3：2：0.3, heated quartz base tube to 2250 DEG C are sintered to each layer, i.e.,
Contraction obtains elliptical fiber prefabricated rods, its a diameter of 15mm,；
(7) it is obtained elliptical fiber prefabricated rods are fixed on spin draw machine, and make its backspin end deviation
Ri<50 μm, run spin draw machine so that the rotary speed of spin draw machine is 1000r/min, rotates intercept
For 5mm, drawing speed is 5m/min, to elliptical fiber preform, that is, obtains the oval of butterfly junction type and protects inclined
Optical fiber.
Embodiment 5
A kind of oval polarization maintaining optical fibre, the cross section structure of the polarization maintaining optical fibre is followed successively by from the inside to surface the core layer of ovalize
4, the inner cladding 3 of the core layer 4 is wrapped up, wrap up the stress region layer 2 of the inner cladding 3, and parcel
The surrounding layer 1 of the stress region layer 2, also doped with the Tb of 1000ppm in described core layer 42O3
With the CeO of 300ppm2, the circularity of described core layer 4 is 90%, the diameter of described oval polarization maintaining optical fibre
For 130 μm, wherein, the long axial length and inner cladding 3 of core layer 4, stress region layer 2 and surrounding layer 1
Diameter ratio is 4:40:100:125.
The preparation method of above-mentioned oval polarization maintaining optical fibre, comprises the following steps：
(1) toward in quartz base tube in molar ratio 1.2:1 is passed through SiCl4And O2, reaction is heated to, and deposition is obtained
SiO2Prefabricated rods surrounding layer；
(2) after prefabricated rods outer cladding deposition is good, in molar ratio 80：32：150 are passed through SiCl4、BBr3And O2,
It is heated to 1850 DEG C to be reacted, on prefabricated rods surrounding layer SiO is deposited2/B2O3Prefabricated rods stress region layer；
(3) it is passed through etching gas SF6, with the quartzy base tube center of circle as symmetric points, remove in 1850 DEG C of etchings prefabricated
The part stressed zone on the symmetrical both sides of rod stress region layer so that the symmetrical both sides of the prefabricated rods stress region layer of remainder are mutual
It is not connected to and in butterfly junction type；
(4) after the completion of etching, in molar ratio 40：5：1：100 are passed through SiCl4、POCl3、SF6And O2,
2050 DEG C of reactions are heated to, deposition obtains prefabricated rods inner cladding；
(5) after the completion of prefabricated rods inner cladding deposition, in molar ratio 3：1：0.2：0.06：20 are passed through SiCl4、
GeCl4、TbCl3、CeCl4And O2, it is heated to 2050 DEG C and is reacted, deposition obtains rod sandwich layer；
(6) deposit after the completion of, now, prefabricated rods surrounding layer, prefabricated rods stress region layer, prefabricated rods inner cladding and
The ratio of the thickness of rod sandwich layer is 1.5：3：2：0.4, heated quartz base tube to 2450 DEG C are sintered to each layer, i.e.,
Contraction obtains elliptical fiber prefabricated rods, its a diameter of 18mm,；
(7) it is obtained elliptical fiber prefabricated rods are fixed on spin draw machine, and make its backspin end deviation
Ri<50 μm, run spin draw machine so that the rotary speed of spin draw machine is 1000r/min, rotates intercept
For 6mm, drawing speed is 6m/min, to elliptical fiber preform, that is, obtains the oval of butterfly junction type and protects inclined
Optical fiber.
Embodiment 6
A kind of oval polarization maintaining optical fibre, the cross section structure of the polarization maintaining optical fibre is followed successively by from the inside to surface the core layer of ovalize
4, the inner cladding 3 of the core layer 4 is wrapped up, wrap up the stress region layer 2 of the inner cladding 3, and parcel
The surrounding layer 1 of the stress region layer 2, also doped with the Tb of 900ppm in described core layer 42O3With
The CeO of 275ppm2, the circularity of described core layer 4 is 75%, described oval polarization maintaining optical fibre it is a diameter of
125 μm, wherein, the long axial length and inner cladding 3 of core layer 4, stress region layer 2 and surrounding layer 1 it is straight
The ratio in footpath is 4:40:100:125.
The preparation method of above-mentioned oval polarization maintaining optical fibre, comprises the following steps：
(1) toward in quartz base tube in molar ratio 1.1:1 is passed through SiCl4And O2, reaction is heated to, and deposition is obtained
SiO2Prefabricated rods surrounding layer；
(2) after prefabricated rods outer cladding deposition is good, in molar ratio 79：32.5：150 are passed through SiCl4、BBr3With
O2, it is heated to 1750 DEG C and is reacted, deposit SiO on prefabricated rods surrounding layer2/B2O3Prefabricated rods stress region layer；
(3) it is passed through etching gas SF6, with the quartzy base tube center of circle as symmetric points, remove in 1650 DEG C of etchings prefabricated
The part stressed zone on the symmetrical both sides of rod stress region layer so that the symmetrical both sides of the prefabricated rods stress region layer of remainder are mutual
It is not connected to and in butterfly junction type；
(4) after the completion of etching, in molar ratio 35：4：1：90 are passed through SiCl4、POCl3、SF6And O2, plus
Heat to 1850～2050 DEG C of reactions, deposition obtain prefabricated rods inner cladding；
(5) after the completion of prefabricated rods inner cladding deposition, in molar ratio 2.5：1：0.15：0.045：15 are passed through SiCl4、
GeCl4、TbCl3、CeCl4And O2, it is heated to 2000 DEG C and is reacted, deposition obtains rod sandwich layer；
(6) deposit after the completion of, now, prefabricated rods surrounding layer, prefabricated rods stress region layer, prefabricated rods inner cladding and
The ratio of the thickness of rod sandwich layer is 1.4：4：2：0.35, heated quartz base tube to 2350 DEG C are sintered to each layer,
Shrink and obtain elliptical fiber prefabricated rods, its a diameter of 16mm,；
(7) it is obtained elliptical fiber prefabricated rods are fixed on spin draw machine, and make its backspin end deviation
Ri<50 μm, run spin draw machine so that the rotary speed of spin draw machine is 1000r/min, rotates intercept
For 5.5mm, drawing speed is 5.5m/min, to elliptical fiber preform, that is, obtains the ellipse of butterfly junction type
Polarization maintaining optical fibre.
The specification of obtained oval polarization maintaining optical fibre is as shown in table 1 below：
The above-mentioned description to embodiment is to be understood that and use to send out for ease of those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and here
The General Principle of explanation is applied in other embodiment without through performing creative labour.Therefore, the present invention is not limited
In above-described embodiment, those skilled in the art's announcement of the invention, without departing from changing that scope is made
Entering and change all should be within protection scope of the present invention.
Claims (7)
1. a kind of oval polarization maintaining optical fibre, it is characterised in that the cross section structure of the polarization maintaining optical fibre is followed successively by from the inside to surface
The core layer of ovalize, wraps up the inner cladding of the core layer, wraps up the stress region layer of the inner cladding,
And the surrounding layer of the parcel stress region layer, also doped with 800～1000ppm's in described core layer
Tb2O3With the CeO of 250～300ppm2。
2. a kind of oval polarization maintaining optical fibre according to claim 1, it is characterised in that described core layer
Circularity is 60～90%.
3. a kind of oval polarization maintaining optical fibre according to claim 1, it is characterised in that described oval to protect inclined
A diameter of 120～130 μm of optical fiber, wherein, the long axial length of core layer and inner cladding, stress region layer and
The diameter ratio of surrounding layer is 4:40:100:125.
4. a kind of preparation method of the oval polarization maintaining optical fibre as described in claims 1 to 3 is arbitrary, it is characterised in that
Comprise the following steps：
(1) it is passed through SiCl toward in quartzy base tube4And O2, heating response, and deposition obtains SiO2Prefabricated rods outsourcing
Layer；
(2) after prefabricated rods outer cladding deposition is good, it is passed through SiCl4、BBr3And O2, heating is reacted, pre-
SiO is deposited on rod surrounding layer processed2/B2O3Prefabricated rods stress region layer；
(3) etching gas are passed through, with the quartzy base tube center of circle as symmetric points, etching removes prefabricated rods stress region layer pair
Claim the part stressed zone on both sides so that the symmetrical both sides of the prefabricated rods stress region layer of remainder are mutually not connected to；
(4) after the completion of etching, it is passed through SiCl4、POCl3、SF6And O2, heating response, deposition obtain prefabricated
Rod inner cladding；
(5) after the completion of prefabricated rods inner cladding deposition, it is passed through SiCl4、GeCl4、TbCl3、CeCl4And O2, plus
Heat is reacted, and deposition obtains rod sandwich layer；
(6) after the completion of depositing, heated quartz base tube is sintered to each layer, that is, shrink that to obtain elliptical fiber prefabricated
Rod；
(7) it is obtained elliptical fiber prefabricated rods are fixed on spin draw machine, and make its backspin end deviation
Ri<50 μm, operation spin draw machine obtains oval polarization maintaining optical fibre to elliptical fiber preform.
5. a kind of preparation method of oval polarization maintaining optical fibre according to claim 4, it is characterised in that step
(1) SiCl described in4And O2Intake mol ratio be (1～1.2):1, reaction temperature is 1850 DEG C；
SiCl described in step (2)4、BBr3And O2Intake mol ratio be (78～80)：(32～33)：
150, its reaction temperature is 1650～1850 DEG C；
Etching gas described in step (3) are SF6, etching temperature is 1450～1850 DEG C, prefabricated after etching
Rod stress region layer is in butterfly junction type or panda type；
SiCl described in step (4)4、POCl3、SF6And O2Intake mol ratio be (30～40)：
(3～5)：1：(80～100), its heating response temperature is 1850～2050 DEG C；
SiCl described in step (5)4、GeCl4、TbCl3、CeCl4And O2Intake mol ratio be (2～3)：
1：(0.1～0.2)：(0.035～0.06)：(10～20), its heating response temperature is 1850～2050 DEG C；
Sintering temperature described in step (6) is 2250～2450 DEG C.
6. the preparation method of a kind of oval polarization maintaining optical fibre according to claim 5, it is characterised in that work as quarter
When prefabricated rods stress region layer after erosion is in butterfly junction type；A diameter of 15～18mm of obtained elliptical fiber prefabricated rods,
The rotary speed of spin draw machine is 1000r/min, and rotation intercept is 5～6mm, and drawing speed is 5～6m/min；
When the prefabricated rods stress region layer after etching be in panda type when, obtained elliptical fiber prefabricated rods it is a diameter of
40～45mm, the rotary speed of spin draw machine is 2000r/min, and rotation intercept is 4～5mm, and drawing speed is
8～10m/min.
7. a kind of preparation method of oval polarization maintaining optical fibre according to claim 5, it is characterised in that step
(1) it is the prefabricated rods surrounding layer of deposition, prefabricated rods stress region layer, pre- in～(2) and step (4)～(5)
The ratio of the thickness of rod inner cladding processed and rod sandwich layer is (1.2～1.5)：(3～5)：2：(0.3～0.4).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110954987A (en) * | 2019-12-05 | 2020-04-03 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | A kind of elliptical core bow-tie type single-polarization structure optical fiber and manufacturing method thereof |
| CN111443424A (en) * | 2020-05-08 | 2020-07-24 | 长飞光纤光缆股份有限公司 | Anti-radiation polarization maintaining optical fiber |
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| CN1809771A (en) * | 2003-06-19 | 2006-07-26 | 康宁股份有限公司 | Single polarization optical fiber and system and method for producing same |
| US20070269175A1 (en) * | 2006-05-19 | 2007-11-22 | Xin Chen | Optical fiber with plurality of air holes and stress rods |
| US20090060435A1 (en) * | 2007-07-31 | 2009-03-05 | Xin Chen | Polarization maintaining and single polarization optical fiber |
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| CN1809771A (en) * | 2003-06-19 | 2006-07-26 | 康宁股份有限公司 | Single polarization optical fiber and system and method for producing same |
| US20070269175A1 (en) * | 2006-05-19 | 2007-11-22 | Xin Chen | Optical fiber with plurality of air holes and stress rods |
| US20090060435A1 (en) * | 2007-07-31 | 2009-03-05 | Xin Chen | Polarization maintaining and single polarization optical fiber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110954987A (en) * | 2019-12-05 | 2020-04-03 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | A kind of elliptical core bow-tie type single-polarization structure optical fiber and manufacturing method thereof |
| CN111443424A (en) * | 2020-05-08 | 2020-07-24 | 长飞光纤光缆股份有限公司 | Anti-radiation polarization maintaining optical fiber |
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