CN109407302B - Polarization controller - Google Patents
Polarization controller Download PDFInfo
- Publication number
- CN109407302B CN109407302B CN201811394901.8A CN201811394901A CN109407302B CN 109407302 B CN109407302 B CN 109407302B CN 201811394901 A CN201811394901 A CN 201811394901A CN 109407302 B CN109407302 B CN 109407302B
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- China
- Prior art keywords
- optical fiber
- fiber fixing
- fixing plate
- ring
- polarization controller
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention discloses a polarization controller which is characterized by comprising an optical fiber fixing unit and a single-mode optical fiber which is connected with the optical fiber fixing unit and is annular in the middle. Compared with the traditional polarization controller, the polarization controller can obtain larger polarization state change amount under the same rotation angle, has simpler structure and small structure volume, can more quickly adjust the polarization direction in a polarization light path, and has wide practical range.
Description
Technical Field
The invention relates to the field of communication and sensing, in particular to linearly polarized light transmission and test, and specifically relates to a polarization controller.
Background
In the working process of the traditional annular mechanical polarization controller, the annular optical fiber can only rotate by taking the linear part of the optical fiber which is enclosed into a ring as an axis. The annular mechanical polarization controller has the defects that three annular optical fibers need to be controlled, the equipment volume is large, the control program is complex, and the difficulty in realizing linear controllable change is high due to a plurality of variables.
Disclosure of Invention
The present invention is directed to a polarization controller, which overcomes the shortcomings of the prior art. Compared with the traditional polarization controller, the polarization controller can obtain larger polarization state change amount under the same rotation angle, has simpler structure and small structure volume, can more quickly adjust the polarization direction in a polarization light path, and has wide practical range.
The technical scheme for realizing the purpose of the invention is as follows:
a polarization controller, different from the prior art, comprises an optical fiber fixing unit and a single mode optical fiber which is connected with the optical fiber fixing unit and is annular in the middle.
The optical fiber fixing unit comprises an optical fiber fixing plate, a cylindrical adjusting shaft which is connected with the optical fiber fixing plate into a whole is arranged at the edge of the optical fiber fixing plate, a damping rubber ring is sleeved outside the adjusting shaft, the adjusting shaft sleeved with the damping rubber ring is connected with the part of the equipment shell, and the damping rubber ring is arranged to provide proper damping for the rotating process of the adjusting shaft and keep the adjusting shaft immovable after being stopped at a certain position.
The single-mode optical fiber comprises a single-mode optical fiber body, a single-mode optical fiber fixing plate and an optical fiber fixing plate, wherein the two ends of the single-mode optical fiber body are linear, the middle part of the single-mode optical fiber body is in a single-ring shape or a plurality of rings in the same direction, the diameter of the single-ring or the plurality of rings in the same direction is not smaller than the minimum bending diameter of the single-mode optical fiber body, the single-ring or the plurality of rings in the same direction are fixed.
The optical fiber fixing plate is provided with a group of movably adjustable positioning bulges, and the positions of the positioning bulges on the optical fiber fixing plate can be adjusted according to the size of a single-ring or multi-ring of single-mode optical fibers in the same direction.
The number of the positioning protrusions is at least 3.
Laser signals enter from one end of the single-mode fiber and are output from the other end of the single-mode fiber, the adjusting shaft drives the fiber fixing plate and the single-mode fiber to rotate together by means of rotating torque applied to the adjusting shaft, at the moment, the polarization state of the laser signals in the single-mode fiber changes, and linear polarization changes according to the polarization angle.
Compared with the traditional annular mechanical polarization controller, the technical scheme realizes a smaller and more compact structure under the same polarization state change through a new rotation mode, obtains a larger polarization state change amount under the same rotation angle, and is very favorable for integration in equipment in a narrow space.
Compared with the traditional polarization controller, the polarization controller has the advantages of simpler structure, small structure volume, capability of adjusting the polarization direction in a polarization light path more quickly and wide practical range.
Drawings
FIG. 1 is a schematic structural view in the example;
FIG. 2 is a schematic view of the rotation direction of the single-mode optical fiber in the embodiment.
In the figure, 1, an optical fiber fixing unit 2, a single mode optical fiber 3, an optical fiber fixing plate 4, an adjusting shaft 5, a damping rubber ring 6, an equipment shell part 7 and a positioning bulge are arranged.
Detailed Description
The invention will be further elucidated with reference to the drawings and examples, without however being limited thereto.
Referring to fig. 1, the optical fiber fixing unit 1 includes an optical fiber fixing plate 3, a cylindrical adjusting shaft 4 integrally connected to the optical fiber fixing plate 3 is disposed at an edge portion of the optical fiber fixing plate 3, a damping rubber ring 5 is sleeved outside the adjusting shaft 4, the adjusting shaft 4 sleeved with the damping rubber ring 5 is connected to an equipment housing portion 6, and the damping rubber ring 5 is disposed to provide a proper damping for a rotation process of the adjusting shaft 4 and to keep the adjusting shaft stationary after being stopped at a certain position.
The two ends of the single-mode optical fiber 2 are linear, the middle part of the single-mode optical fiber is in a single-ring shape or a multi-ring shape in the same direction, the diameter of the single-ring or the multi-ring in the same direction is not smaller than the minimum bending diameter of the single-mode optical fiber 2, the single-ring or the multi-ring in the same direction are fixed on the optical fiber fixing plate 3, and the optical fiber fixing plate 3 drives the single-mode optical fiber 2 to rotate around the axial direction of the flat ring-shaped optical fiber which is in a linear optical fiber intersection point through the two ends in the plane where.
The optical fiber fixing plate 3 is provided with a group of movably adjustable positioning bulges 7, and the positions of the positioning bulges 7 on the optical fiber fixing plate 3 can be adjusted according to the size of a single-ring or a plurality of rings in the same direction of the single-mode optical fiber 2.
The number of the positioning projections 7 is at least 3, in this case 3.
Laser signal gets into from single mode fiber 2's one end to export from single mode fiber 2 other end, exert certain turning moment to adjusting shaft 4 and make adjusting shaft 4 drive fiber fixing plate 3 and single mode fiber 2 rotate together, the polarization of the laser signal in single mode fiber 2 at this moment changes, is the change of polarization angle to the line bias.
Claims (3)
1. A polarization controller is characterized by comprising an optical fiber fixing unit and a single mode optical fiber which is connected with the optical fiber fixing unit and is annular in the middle; the optical fiber fixing unit comprises an optical fiber fixing plate, a cylindrical adjusting shaft connected with the optical fiber fixing plate into a whole is arranged at the edge part of the optical fiber fixing plate, a damping rubber ring is sleeved outside the adjusting shaft, and the adjusting shaft sleeved with the damping rubber ring is connected with the part of the equipment shell;
the both ends of single mode fiber are the linearity, and the mid portion is that the single circle is cyclic annular or the many circles of equidirectional are cyclic annular, and the diameter of single circle ring or the many circles of rings of equidirectional is not less than this single mode fiber's minimum bending diameter, and single circle ring or the many circles of rings of equidirectional are fixed on the optic fibre fixed plate, the linear tip of single mode fiber with it sets up to adjust axisymmetric both ends about the middle part of optic fibre fixed plate.
2. The polarization controller of claim 1, wherein the optical fiber fixing plate is provided with a set of movably adjustable positioning protrusions, and the positions of the positioning protrusions on the optical fiber fixing plate are adjustable according to the size of a single-ring or multi-ring of single-mode optical fibers in the same direction.
3. The polarization controller of claim 2, wherein the number of positioning protrusions is at least 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811394901.8A CN109407302B (en) | 2018-11-22 | 2018-11-22 | Polarization controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811394901.8A CN109407302B (en) | 2018-11-22 | 2018-11-22 | Polarization controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109407302A CN109407302A (en) | 2019-03-01 |
| CN109407302B true CN109407302B (en) | 2021-03-16 |
Family
ID=65474615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811394901.8A Active CN109407302B (en) | 2018-11-22 | 2018-11-22 | Polarization controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109407302B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4389090A (en) * | 1980-09-04 | 1983-06-21 | The Board Of Trustees Of Leland Stanford Jr. Univ. | Fiber optic polarization controller |
| CN102944930B (en) * | 2012-11-08 | 2014-07-02 | 电子科技大学 | Adjusting device of optical fiber polarization controller |
| CN104423076A (en) * | 2013-08-28 | 2015-03-18 | 安徽量子通信技术有限公司 | Polarization controller |
| CN203688909U (en) * | 2014-01-10 | 2014-07-02 | 江苏昂德光电科技有限公司 | Fiber ring rotation polarization controller |
| CN104155754B (en) * | 2014-09-05 | 2017-01-25 | 天津迈达医学科技股份有限公司 | Electrical optical fiber polarization controller |
| CN207851406U (en) * | 2018-02-09 | 2018-09-11 | 无锡源清瑞光激光科技有限公司 | Simple fibre-optic polarization adjuster |
-
2018
- 2018-11-22 CN CN201811394901.8A patent/CN109407302B/en active Active
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| Publication number | Publication date |
|---|---|
| CN109407302A (en) | 2019-03-01 |
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