CN112327405A - Panda type single polarization optical fiber and preparation method thereof - Google Patents
Panda type single polarization optical fiber and preparation method thereof Download PDFInfo
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- CN112327405A CN112327405A CN202011271785.8A CN202011271785A CN112327405A CN 112327405 A CN112327405 A CN 112327405A CN 202011271785 A CN202011271785 A CN 202011271785A CN 112327405 A CN112327405 A CN 112327405A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 59
- 230000010287 polarization Effects 0.000 title claims abstract description 44
- 208000025174 PANDAS Diseases 0.000 title claims abstract description 22
- 208000021155 Paediatric autoimmune neuropsychiatric disorders associated with streptococcal infection Diseases 0.000 title claims abstract description 22
- 240000004718 Panda Species 0.000 title claims abstract description 14
- 235000016496 Panda oleosa Nutrition 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 67
- 238000005253 cladding Methods 0.000 claims abstract description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 13
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 7
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- 239000011574 phosphorus Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000005229 chemical vapour deposition Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 2
- 210000003518 stress fiber Anatomy 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000004886 process control Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 8
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000007526 fusion splicing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- G02B6/02—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
- C03B37/02—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
-
- 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
-
- 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
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02319—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by core or core-cladding interface features
- G02B6/02333—Core having higher refractive index than cladding, e.g. solid core, effective index guiding
-
- 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
- G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention relates to a panda type single polarization fiber and a preparation method thereof, wherein the panda type single polarization fiber comprises a fiber core, a cladding and a stress area, the fiber core is a round fiber which takes silicon dioxide as a matrix and is doped with germanium and phosphorus elements, the center of the circle of the round fiber is coincident with the center position of the fiber, the radius a of the round fiber is 3-5 mu m, the stress area is a round stress fiber which takes silicon dioxide as a matrix and is doped with boron trioxide, the two stress areas are symmetrically distributed on two sides of the fiber core, the distance between the edge of the stress area and the center of the fiber is r, and r = (1.5-2.; the fiber cladding is made of pure silica, and the fiber core and the stress area are contained in the fiber cladding. The optical fiber has reasonable structure, simple and convenient process control, can effectively avoid polarization mode crosstalk, and can be widely applied to the aspects of optical fiber gyroscopes, current sensors, super radiation light sources and the like. The optical fiber core is circular, and can be better matched with commercial polarization maintaining optical fibers, thereby greatly reducing the fusion loss. Meanwhile, the diameter of the prefabricated master rod is large, a single optical fiber can obtain a longer drawn wire length, and the method is easy to prepare and produce and beneficial to wide development and application.
Description
Technical Field
The invention relates to a polarization optical fiber, in particular to a panda type single polarization optical fiber and a preparation method thereof.
Background
Common optical fibers are mostly in a symmetrical cylindrical shape, however, in practical situations, the optical fibers can damage the geometric shape of the circular waveguide due to the non-uniform roundness of the fiber core and the cladding, the asymmetric lateral pressure borne by the optical fibers, the asymmetric refractive index distribution caused by the deformation of the optical fibers, and the like, so that a birefringence phenomenon can be generated, and the polarization state of light can be irregularly changed in the transmission process. In applications that are sensitive to the polarization state, the polarization state of the fiber transmission must be tightly controlled. The polarization maintaining fiber can maintain the transmission of the polarization state of the signal light, but crosstalk still exists between the two polarization states.
The single polarization fiber is a fiber with a single mode and a single polarization state, and the large birefringence is introduced into the fiber, so that the propagation constants of two polarization states transmitted in the fiber are greatly different, thereby realizing that only one polarization state is transmitted in the fiber, and the other polarization state is cut off, and solving the problem of polarization state crosstalk of the polarization-maintaining fiber. The single polarization optical fiber is widely applied to the fields of optical fiber gyroscopes, current sensors, super radiation light sources and the like.
The fabrication of single polarization fibers can be achieved using three basic methods, geometry, waveguide structure, and stress anisotropy. For example, an elliptic core fiber that geometrically induces high birefringence, a bow-tie fiber, a panda fiber, an elliptic stress clad fiber, and the like that induce high birefringence by stress are used. The elliptical-core optical fiber can greatly increase the difficulty of fusion-splicing with other optical fibers in practical application due to the more eccentric core structure. The collar-type single-polarization optical fiber and the elliptical stress cladding type single-polarization optical fiber are realized through deposition in a tube, so that the size of a preform rod of the single-polarization optical fiber is greatly limited, and the drawing length of a single optical fiber is short.
Disclosure of Invention
Aiming at the defects of the existing single-polarization optical fiber and the preparation technical method thereof, the invention provides the panda type single-polarization optical fiber and the preparation method thereof, the single-polarization optical transmission can be effectively realized through stress application, and the fiber core in the optical fiber only supports one polarization state HE of a transmission fundamental mode11XAnd polarization mode crosstalk can be effectively avoided. The fiber core of the optical fiber is circular, and can be better matched with commercial polarization maintaining optical fibers (such as Nufern PM980-XP polarization maintaining optical fibers), so that the fusion loss is greatly reduced, and the fusion loss is low. Meanwhile, the manufacturing process of the optical fiber adopts a punching assembly method, the diameter of a preform rod is large, a single optical fiber can obtain a longer wire drawing length, and the preparation and production are easy. The specific technical scheme is that the panda type single polarization optical fiber comprises a fiber core, a cladding and a stress area, and is characterized in that: the fiber core is a circular fiber which takes silicon dioxide as a matrix and is doped with germanium and phosphorus elements, the center of the circular fiber is coincided with the center of the fiber, the radius a of the circular fiber is 3-5 mu m, the stress regions are circular stress fibers which take silicon dioxide as a matrix and are doped with boron trioxide, the two stress regions are symmetrically distributed on two sides of the fiber core, the distance between the edge of each stress region and the center of the fiber is r, and r = (1.5-2.5) a; the fiber cladding is made of pure silica, and the fiber core and the stress area are contained in the fiber cladding.
The radius R of the circular stress rod in the stress area is
The refractive index of the fiber core is higher than that of the cladding, and the difference between the refractive index of the core and the refractive index of the cladding is 0.004-0.015.
The difference of the refractive index of the stress area and the refractive index of the stress rod of the cladding is-0.008 to-0.01.
The preparation method comprises the following steps of (1) preparing the single mode rod by adopting a chemical vapor deposition method, doping germanium and phosphorus elements in a fiber core, and controlling the number of deposition layers and various gas flows according to the pore size requirement of the fiber core; (2) independently preparing a stress rod which takes silicon dioxide as a matrix and is doped with boron trioxide by adopting a chemical vapor deposition method; (3) sleeving the prepared single-mode rod according to the radius ratio of the fiber core and the cladding required by the prepared optical fiber; (4) punching the single-mode rod after sleeving according to the positions of the two stress areas; (5) inserting the stress rod into the hole, and vacuumizing and packaging the stress rod; (6) and drawing and coating the optical fiber to manufacture the panda type single polarization optical fiber.
The invention has the technical effects that based on the photoelastic effect, the panda type optical fiber structure is adopted to introduce stress birefringence, thereby realizing single polarization light transmission; meanwhile, the circular fiber core structure can reduce the welding loss with the commercial polarization maintaining fiber; the optical fiber adopts a punching assembly process, the diameter of a preform rod is large, the effective wire drawing length of a single optical fiber is long, and the wide development and application are facilitated.
Drawings
Fig. 1 is a structure view of a panda-type single polarization optical fiber.
FIG. 2 is a refractive index distribution diagram of example 1 of the present invention.
FIG. 3 is a process flow diagram.
FIG. 4 is a transmission loss spectrum for two polarization states in the fundamental mode of the fiber of example 1.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Examples
As shown in fig. 1 and 2, the radius a of the core 1 of the panda-type single polarization fiber is 2 μm, and the ratio of the distance r from the edge of the stress region 2 close to the core 1 to the center of the fiber to the core radius a is r/a =2.3, so that the value of r is 4.6 μm. According to the relation between the stress area radius R and R, the stress area radius R can be determined to be about 11.1 μm.
The fiber core 1 takes silicon dioxide as a matrix, germanium, phosphorus and other elements are doped in the middle, and the refractive index difference between the core and the cladding is 0.010. The composition of the cladding 2 is pure silica and is free of other element dopants. The two stress regions 3 are silica-based and doped with boron trioxide, the refractive index of the two stress regions is lower than that of the cladding of the optical fiber, and the difference of the refractive indexes is-0.0086.
As shown in fig. 3, the manufacturing method mainly includes the following steps,
preparing a single mold rod by adopting a chemical vapor deposition method, wherein elements such as germanium, phosphorus and the like are doped in a fiber core. The number of deposition layers and the flow of various gases are controlled according to the requirement of the numerical aperture of the fiber core.
And (II) independently preparing the boron-doped stress rod by adopting a chemical vapor deposition method.
And (III) sleeving the prepared single-mode rod according to the core-cladding ratio of the prepared optical fiber, wherein the core-cladding ratio is 4:125 in the embodiment.
And (IV) punching the single-mode rod after sleeving the tubes, wherein the center positions of the two stress rods and the center of the fiber core are on the same straight line, and the ratio of the distance from the edge of the stress area close to the fiber core to the center of the optical fiber to the radius of the fiber core is 2.3, so that the punching position can be determined.
And (V) inserting the stress rod into the hole, and vacuumizing and packaging the stress rod.
And sixthly, drawing and coating the optical fiber preform to manufacture the panda type single polarization optical fiber, wherein the diameter of the fiber core is 4 microns, the diameter of the cladding is 125 microns, and the diameter of the stress region is 22.2 microns.
As shown in FIG. 4, the transmission loss spectra of the panda-type single-polarization optical fiber prepared in this example were measured for two polarization states, and HE is shown on the left11YMode, HE on the right11XModes, in which only one polarization state HE of the fundamental mode can be transmitted within a wavelength window between the two loss curves11XAnd the function of the panda type single polarization optical fiber is realized.
In summary, the present invention provides a panda-type single polarization fiber and a method for manufacturing the same, but the present invention is not limited to the above embodiments, and those skilled in the art can make several modifications and decorations without departing from the principle of the present invention, and these modifications and decorations are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (5)
1. The utility model provides a panda type single polarization optic fibre, contains fibre core (1), cladding (2), stress zone (3), its characterized in that: the fiber core (1) is a round optical fiber which takes silicon dioxide as a matrix and is doped with germanium and phosphorus elements, the center of the round optical fiber is coincided with the center of the optical fiber, the radius a of the round optical fiber is 3-5 mu m, the stress regions (3) are round stress optical fibers which take silicon dioxide as a matrix and are doped with diboron trioxide, the two stress regions (3) are symmetrically distributed on two sides of the fiber core (1), the distance between the edge of each stress region and the center of the optical fiber is r, and r = (1.5-2.5) a; the optical fiber cladding (2) is made of pure silica, and the fiber core (1) and the stress region (3) are contained in the optical fiber cladding.
2. The panda-type single polarization optical fiber according to claim 1, wherein: the radius R of the circular stress rod of the fiber core stress area (3) is
。
3. The panda-type single polarization optical fiber according to claim 1, wherein: the refractive index of the fiber core (1) is higher than that of the cladding (2), and the difference between the core and the cladding refractive index is 0.004-0.015.
4. The panda-type single polarization optical fiber according to claim 1, wherein: the difference of the refractive index of the stress rod between the stress area (3) and the cladding (2) is-0.008 to-0.01.
5. The method for preparing panda-type single polarization optical fiber according to claim 1, wherein: the preparation steps are as follows,
(1) preparing a single mold rod by adopting a chemical vapor deposition method, doping germanium and phosphorus elements in a fiber core, and controlling the number of deposition layers and various gas flows according to the aperture requirement of the fiber core (1);
(2) independently preparing a stress rod which takes silicon dioxide as a matrix and is doped with boron trioxide by adopting a chemical vapor deposition method;
(3) sleeving the prepared single-mode rod according to the radius ratio of the fiber core (1) and the cladding (2) required by preparing the optical fiber;
(4) punching the single-mode rod after sleeving according to the positions of the two stress areas (3);
(5) inserting the stress rod into the hole, and vacuumizing and packaging the stress rod;
(6) and drawing and coating the optical fiber to manufacture the panda type single polarization optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011271785.8A CN112327405A (en) | 2020-11-13 | 2020-11-13 | Panda type single polarization optical fiber and preparation method thereof |
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| CN202011271785.8A CN112327405A (en) | 2020-11-13 | 2020-11-13 | Panda type single polarization optical fiber and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115745391A (en) * | 2022-11-10 | 2023-03-07 | 长飞光纤光缆股份有限公司 | Integrated hollow optical fiber preform, optical fiber and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003238184A (en) * | 2002-02-12 | 2003-08-27 | Furukawa Electric Co Ltd:The | Method for manufacturing polarization-plane-holding optical fiber and polarization-plane-holding optical fiber |
| CN106199827A (en) * | 2016-07-27 | 2016-12-07 | 武汉长盈通光电技术有限公司 | A kind of oval core panda type polarization-preserving fiber and preparation method thereof |
| US20200018896A1 (en) * | 2016-09-19 | 2020-01-16 | Yangtze Optical Fibre And Cable Joint Stock Limited Company | Anti-cracking panda-type polarization-maintaining optical fiber |
| CN111290073A (en) * | 2018-12-07 | 2020-06-16 | 武汉长盈通光电技术有限公司 | 60-micron small-diameter panda-type polarization maintaining optical fiber and preparation method thereof |
| CN111505762A (en) * | 2020-05-24 | 2020-08-07 | 武汉库克光电技术有限公司 | High-precision polarization maintaining optical fiber and preparation method thereof |
-
2020
- 2020-11-13 CN CN202011271785.8A patent/CN112327405A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003238184A (en) * | 2002-02-12 | 2003-08-27 | Furukawa Electric Co Ltd:The | Method for manufacturing polarization-plane-holding optical fiber and polarization-plane-holding optical fiber |
| CN106199827A (en) * | 2016-07-27 | 2016-12-07 | 武汉长盈通光电技术有限公司 | A kind of oval core panda type polarization-preserving fiber and preparation method thereof |
| US20200018896A1 (en) * | 2016-09-19 | 2020-01-16 | Yangtze Optical Fibre And Cable Joint Stock Limited Company | Anti-cracking panda-type polarization-maintaining optical fiber |
| CN111290073A (en) * | 2018-12-07 | 2020-06-16 | 武汉长盈通光电技术有限公司 | 60-micron small-diameter panda-type polarization maintaining optical fiber and preparation method thereof |
| CN111505762A (en) * | 2020-05-24 | 2020-08-07 | 武汉库克光电技术有限公司 | High-precision polarization maintaining optical fiber and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115745391A (en) * | 2022-11-10 | 2023-03-07 | 长飞光纤光缆股份有限公司 | Integrated hollow optical fiber preform, optical fiber and preparation method thereof |
| CN115745391B (en) * | 2022-11-10 | 2024-07-12 | 长飞光纤光缆股份有限公司 | Integrated hollow optical fiber preform, optical fiber and preparation method thereof |
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Application publication date: 20210205 |