CN111290080B - Polarization maintaining optical fiber countershaft splicing method - Google Patents
Polarization maintaining optical fiber countershaft splicing method Download PDFInfo
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- CN111290080B CN111290080B CN202010121744.4A CN202010121744A CN111290080B CN 111290080 B CN111290080 B CN 111290080B CN 202010121744 A CN202010121744 A CN 202010121744A CN 111290080 B CN111290080 B CN 111290080B
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- fiber
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- optical fiber
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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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
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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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2553—Splicing machines, e.g. optical fibre fusion splicer
-
- 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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
- G02B6/2556—Alignment or adjustment devices for aligning prior to splicing including a fibre supporting member inclined to the bottom surface of the alignment means
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- Physics & Mathematics (AREA)
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
The invention provides a polarization maintaining optical fiber countershaft splicing method, which comprises the following steps: step S1: connecting one end of a first to-be-countershaft polarization maintaining optical fiber with a tester, and then butting the other end of the first to-be-countershaft polarization maintaining optical fiber with a light source line through an adapter, wherein the step S2 is to weld a section of single mode optical fiber with the first to-be-countershaft polarization maintaining optical fiber by using a welding machine; step S3: installing the other end of the single-mode fiber on an auxiliary clamp for clamping and enabling the end part of the single-mode fiber to be placed on one side of a welding platform, placing the end part of one end of a second to-be-countershaft polarization maintaining fiber on the other side of the welding platform, and connecting the other end of the second to-be-countershaft polarization maintaining fiber with a tester; step S4: and rotating the auxiliary clamp until the numerical value on the tester is the same as the numerical value D in the step S1, and fusing the single-mode fiber and the second polarization maintaining fiber to be coaxial by the fusion platform to complete the coaxial connection. The coupled polarization maintaining coupler has high extinction ratio, and the fast axis and the slow axis can work simultaneously.
Description
Technical Field
The invention relates to the field of optical fiber processing, in particular to a polarization maintaining optical fiber countershaft splicing method.
Background
The polarization maintaining fiber coupler made of polarization maintaining fiber is one fiber communication device capable of realizing linearly polarized light coupling, light splitting and multiplexing, and features stable transmission of two orthogonal linearly polarized lights in unchanged polarization state, wide application in various military interference sensors and relevant communication fields, fast start of fiber gyro, light weight, no movable element and strong environment adaptability.
Polarization maintaining fiber: the polarization maintaining fiber is a special single-mode fiber which transmits linearly polarized light and can keep the polarization states of two orthogonal linearly polarized light parallel to a stress axis unchanged in the transmission process. Polarization maintaining fiber coupler: the optical fiber coupler made of the polarization maintaining optical fiber is an optical fiber device for realizing linearly polarized light coupling, light splitting and multiplexing, can stably transmit two orthogonal linearly polarized lights, and can keep the respective polarization states unchanged.
At present, the manufacturing methods of the optical fiber coupler mainly comprise two methods: grinding methods and fused biconical methods. An optical cold machining process is adopted, one part of optical fiber is ground along the axial direction of the optical fiber, and then the other part of the optical fiber which is ground is adhered with glue for trial use.
Melting and tapering: two optical fibers without coating layers are closed in a certain mode, melted under high-temperature heating and simultaneously stretched towards two sides, and finally a special waveguide structure in a biconical body form is formed in a heating zone to realize power coupling, as shown in fig. 1. The melting and tapering process has low manufacturing cost and simple process, and the product has good parameter performance and is widely adopted.
The coating layers of the two polarization maintaining fibers are simply removed, the parallelism of polarization maintaining fiber polarization axes can be damaged in the tapering coupling process by adopting parallel burning, the extinction ratio of the polarization maintaining coupler is reduced, and the difference of the splitting ratio of the fast axis and the slow axis is large, so that the double axes can not work simultaneously, and the normal use of the product is influenced.
Disclosure of Invention
In order to solve the problems that the polarization maintaining fiber coupler in the prior art is low in extinction ratio, large in difference of light splitting ratio of a fast axis and a slow axis and incapable of working at the same time of two axes, the invention provides a polarization maintaining fiber counter-axis connection method which is simple in butt joint, higher in extinction ratio of coupled devices, consistent in light splitting ratio of the fast axis and the slow axis and capable of working at the same time of two axes.
The invention provides a polarization maintaining optical fiber countershaft splicing method, which comprises the following steps:
step S1: connecting one end of a first to-be-counter-shaft polarization maintaining optical fiber with a tester, butting the other end of the first to-be-counter-shaft polarization maintaining optical fiber with a light source line through an adapter, and determining the directions and angles of a fast axis and a slow axis according to the value D of the tester;
step S2, using a fusion splicer to fuse one end of a section of single-mode optical fiber and one end of the first to-be-countershaft polarization maintaining optical fiber connected with the tester;
step S3: installing the other end of the single-mode fiber on an auxiliary clamp for clamping and enabling the end part of the single-mode fiber to be placed on one side of a welding platform, placing the end part of one end of a second to-be-countershaft polarization maintaining fiber on the other side of the welding platform, and connecting the other end of the second to-be-countershaft polarization maintaining fiber with a tester;
step S4: and rotating the auxiliary clamp until the numerical value on the tester is the same as the numerical value D in the step S1, and fusing the single-mode fiber and the second polarization maintaining fiber to be coaxial by the fusion platform to complete the coaxial connection.
As a further improvement of the present invention, the auxiliary fixture includes a support and a clamping and rotating mechanism disposed at an upper end of the support, the clamping and rotating mechanism includes a limiting plate and a rotating shaft, the limiting plate is provided with a mounting hole disposed horizontally, the rotating shaft is mounted in the mounting hole, the rotating shaft is axially provided with an optical fiber clamping groove, the limiting plate is provided with an optical fiber mounting groove, and one end of the rotating shaft is provided with a magnetic block capable of pressing, holding and fixing the clamped optical fiber.
As a further improvement of the invention, the other end of the rotating shaft is provided with a rotating handle.
As a further improvement of the invention, the depth of the fiber holding groove is smaller than the diameter of the single mode fiber.
For a further improvement of the invention, the fiber holding groove is a V-groove.
In step S3, the single mode fiber is mounted in a fiber clamping groove on the rotating shaft through a fiber mounting groove on the limiting plate, and is pressed against one end of the single mode fiber by the magnetic block and is attached to the rotating shaft.
For further improvement of the present invention, the single mode fiber in step S2 has the same mode field diameter as the polarization maintaining fiber to be spliced.
The invention has the beneficial effects that: the single-mode fiber is used for replacing the double-shaft polarization maintaining fiber in the coupling area, the transmission characteristic of light cannot be changed in the coupling process, the auxiliary clamp is adopted for carrying out counter shaft connection on the polarization maintaining fiber and the single-mode fiber, the two sections of polarization maintaining fibers can be subjected to quick counter shaft welding, the welding taper batch production of the double-shaft working polarization maintaining fiber coupler is realized, the coupled polarization maintaining coupler has a high extinction ratio, and the fast shaft and the slow shaft can work simultaneously.
Drawings
FIG. 1 is a flow chart of a polarization maintaining fiber to axis splicing method according to the present invention;
FIG. 2 is a block diagram of a first to-be-countershaft polarization maintaining optical fiber and an optical fiber line according to the method for countershaft splicing polarization maintaining optical fibers;
fig. 3 is a butt-joint block diagram of a first to-be-countershaft polarization maintaining optical fiber and a single-mode optical fiber according to a polarization maintaining optical fiber countershaft splicing method of the present invention;
FIG. 4 is a block diagram of a single-mode fiber and a second polarization maintaining fiber to be aligned according to a polarization maintaining fiber alignment method of the present invention;
FIG. 5 is a schematic structural diagram of an auxiliary clamp for a polarization maintaining fiber to axis splicing method according to the present invention;
fig. 6 is a structural view of another angle of the auxiliary clamp of fig. 5.
Reference numerals: 1-a scaffold; 2-a limiting plate; 3-a rotating shaft; 21-an optical fiber mounting groove; 31-a fiber holding groove; 4-rotating the handle; 5-magnetic block.
Detailed Description
As shown in fig. 1 to 6, the present invention discloses a polarization maintaining fiber to axis connection method, which comprises the following steps:
step S1: one end of a first to-be-counter-shaft polarization maintaining optical fiber is connected with a tester, the other end of the first to-be-counter-shaft polarization maintaining optical fiber is butted with a light source line through an adapter, and one end of the light source line is connected with a light source. The other end of the light source line is kept fixed, the fast axis direction and the angle of the polarization maintaining optical fiber can be determined by rotating one end of the first to-be-centered polarization maintaining optical fiber connected with the adapter and combining with the numerical value D on the tester, and at the moment, the connecting end of the polarization maintaining optical fiber and the adapter is kept fixed;
step S2, using a fusion splicer to fuse one end of a section of single-mode fiber with one end of the first to-be-countershaft polarization maintaining fiber connected with the tester, and separating the tester from the first to-be-countershaft polarization maintaining fiber;
step S3: installing the other end of the single-mode optical fiber on an auxiliary clamp for clamping and enabling the end part of the single-mode optical fiber to be placed on one side of a welding platform, placing the end part of one end of a second to-be-countershaft polarization maintaining optical fiber on the other side of the welding platform, and connecting the other end of the second to-be-countershaft polarization maintaining optical fiber with the tester in the step S2;
step S4: and (4) rotating the auxiliary clamp until the numerical value on the tester is the same as the numerical value D in the step S1, indicating that the directions of the fast and slow axes of the first to-be-countershaft polarization maintaining optical fiber and the second to-be-countershaft polarization maintaining optical fiber are consistent, and at the moment, welding the single mode optical fiber and the second to-be-countershaft polarization maintaining optical fiber by the welding platform to complete countershaft connection.
In this technical scheme, supplementary anchor clamps include support 1 and locate the centre gripping rotary mechanism of 1 upper end of support, centre gripping rotary mechanism includes limiting plate 2 and rotation axis 3, limiting plate 2 is equipped with the mounting hole of horizontal setting, rotation axis 3 is installed in the mounting hole and can rotate in the mounting hole, 3 one side axial of rotation axis is equipped with optic fibre centre gripping groove, limiting plate 2 is equipped with optic fibre mounting groove 21, 3 one end of rotation axis is equipped with can be right optic fibre after the centre gripping is pressed and is held fixed magnetic block 5, the degree of depth in optic fibre centre gripping groove 31 is less than single mode fiber's diameter can press and hold to its optic fibre through magnetic block 5 like this and fix in optic fibre centre gripping groove 31, optic fibre centre gripping groove 31 is the V type groove, further strengthens fixed effect.
In this technical scheme, the other end of rotation axis 3 is equipped with twist grip 4, conveniently carries out the rotation operation to the countershaft.
In step S3, single mode fiber passes through install in the epaxial optic fibre centre gripping groove 31 of rotating in the optic fibre mounting groove 21 on the limiting plate 2, and pass through magnetic block 5 press in single mode fiber' S one end and absorption are in the pivot, after the counter shaft is continued to be accomplished, single mode fiber after the butt joint can take out through the optic fibre mounting groove 21 on the limiting plate 2.
In the technical scheme, the diameters of the mode fields of the single-mode fiber and the polarization maintaining fiber to be butted in the step S2 are the same, the axial connection loss is small, and the welding loss of each connection point can be smaller than 0.03dB after the welding parameters are adjusted.
The single-mode fiber is used for replacing the double-shaft polarization-maintaining fiber in the coupling area, the transmission characteristic of light cannot be changed in the coupling process, the auxiliary clamp is used for carrying out shaft-to-shaft connection on the polarization-maintaining fiber and the single-mode fiber, the two sections of polarization-maintaining fibers can be quickly subjected to shaft-to-shaft fusion, the fusion-splicing taper batch production of the double-shaft working polarization-maintaining fiber coupler is realized, the coupled polarization-maintaining coupler has a high extinction ratio, and the fast shaft and the slow shaft can simultaneously work.
The method fundamentally avoids the damage to the parallelism of polarization maintaining optical fiber polarization axes in the parallel taper burning process, ensures that the device has good extinction ratio, has consistent fast-slow axis splitting ratio, can work with double axes simultaneously, and has simple operation and high welding efficiency.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. A polarization maintaining optical fiber to shaft connection method is characterized by comprising the following steps:
step S1: connecting one end of a first to-be-counter-shaft polarization maintaining optical fiber with a tester, butting the other end of the first to-be-counter-shaft polarization maintaining optical fiber with a light source line through an adapter, and determining the directions and angles of a fast axis and a slow axis according to the value D of the tester;
step S2: welding one end of a section of single-mode optical fiber with one end of a first to-be-countershaft polarization maintaining optical fiber connected with a tester by using a welding machine;
step S3: installing the other end of the single-mode optical fiber on an auxiliary clamp for clamping and enabling the end part of the single-mode optical fiber to be arranged on one side of a welding platform, arranging the end part of one end of a second to-be-centered polarization maintaining optical fiber on the other side of the welding platform, and connecting the other end of the second to-be-centered polarization maintaining optical fiber with a tester;
step S4: and rotating the auxiliary clamp until the numerical value on the tester is the same as the numerical value D in the step S1, and fusing the single-mode fiber and the second polarization maintaining fiber to be coaxial by the fusion platform to complete the coaxial connection.
2. The method of claim 1, wherein: the auxiliary clamp comprises a support and a clamping rotating mechanism arranged at the upper end of the support, the clamping rotating mechanism comprises a limiting plate and a rotating shaft, the limiting plate is provided with a transverse mounting hole, the rotating shaft is mounted in the mounting hole, an optical fiber clamping groove is axially arranged on the rotating shaft, the limiting plate is provided with an optical fiber mounting groove, and one end of the rotating shaft is provided with a magnetic block which can press and hold the optical fiber after clamping.
3. The method of claim 2, wherein the polarization maintaining fiber is spliced to the shaft, and the method comprises: and a rotating handle is arranged at the other end of the rotating shaft.
4. The method of claim 2, wherein the polarization maintaining fiber is spliced to the shaft, and the method comprises: the depth of the fiber clamping groove is smaller than the diameter of the single-mode fiber.
5. The method of claim 4, wherein the method comprises: the optical fiber clamping groove is a V-shaped groove.
6. The method of claim 5, wherein: in step S3, the single mode fiber is installed in the fiber holding groove on the rotating shaft through the fiber installation groove on the limiting plate, and is pressed at one end of the single mode fiber by the magnetic block and adsorbed on the rotating shaft.
7. The method of claim 1, wherein: the single mode fiber in the step S2 has the same mode field diameter as the polarization maintaining fiber to be spliced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010121744.4A CN111290080B (en) | 2020-02-26 | 2020-02-26 | Polarization maintaining optical fiber countershaft splicing method |
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| CN202010121744.4A CN111290080B (en) | 2020-02-26 | 2020-02-26 | Polarization maintaining optical fiber countershaft splicing method |
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| CN111290080A CN111290080A (en) | 2020-06-16 |
| CN111290080B true CN111290080B (en) | 2021-06-18 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06242337A (en) * | 1993-02-15 | 1994-09-02 | Furukawa Electric Co Ltd:The | Method for aligning constant polarization optical fiber |
| JP2002098854A (en) * | 2000-09-22 | 2002-04-05 | Sumitomo Electric Ind Ltd | Fusion splicing method for polarization maintaining optical fiber |
| CN103645537A (en) * | 2013-11-28 | 2014-03-19 | 北京浦丹光电技术有限公司 | Device based on polarization maintaining optical fiber end surface fixed axis and re-welding method of polarization maintaining optical fiber end surface fixed axis |
| CN106547050A (en) * | 2017-01-24 | 2017-03-29 | 中国电子科技集团公司第四十研究所 | A kind of polarization maintaining optical fibre polarization principal axis alignment device |
| CN207516594U (en) * | 2017-11-29 | 2018-06-19 | 江苏光扬光电科技有限公司 | Polarization maintaining optical fibre to axis tooling |
| CN207704072U (en) * | 2017-12-04 | 2018-08-07 | 江苏光扬光电科技有限公司 | Draw cone polarization-maintaining fiber coupler |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393292B (en) * | 2011-08-15 | 2013-06-26 | 西安盛佳光电有限公司 | Grating parameter measuring method and device when inscribing grating in polarization preserving fiber |
| CN102890309A (en) * | 2012-09-24 | 2013-01-23 | 北京航空航天大学 | Polarization-maintaining photonic crystal fiber and panda fiber welding method |
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2020
- 2020-02-26 CN CN202010121744.4A patent/CN111290080B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06242337A (en) * | 1993-02-15 | 1994-09-02 | Furukawa Electric Co Ltd:The | Method for aligning constant polarization optical fiber |
| JP2002098854A (en) * | 2000-09-22 | 2002-04-05 | Sumitomo Electric Ind Ltd | Fusion splicing method for polarization maintaining optical fiber |
| CN103645537A (en) * | 2013-11-28 | 2014-03-19 | 北京浦丹光电技术有限公司 | Device based on polarization maintaining optical fiber end surface fixed axis and re-welding method of polarization maintaining optical fiber end surface fixed axis |
| CN106547050A (en) * | 2017-01-24 | 2017-03-29 | 中国电子科技集团公司第四十研究所 | A kind of polarization maintaining optical fibre polarization principal axis alignment device |
| CN207516594U (en) * | 2017-11-29 | 2018-06-19 | 江苏光扬光电科技有限公司 | Polarization maintaining optical fibre to axis tooling |
| CN207704072U (en) * | 2017-12-04 | 2018-08-07 | 江苏光扬光电科技有限公司 | Draw cone polarization-maintaining fiber coupler |
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| CN111290080A (en) | 2020-06-16 |
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