CN220232168U

CN220232168U - Polarization maintaining fiber isolator

Info

Publication number: CN220232168U
Application number: CN202322016896.XU
Authority: CN
Inventors: 杨文文
Original assignee: Wuhan Hanxing Technology Co ltd
Current assignee: Wuhan Hanxing Technology Co ltd
Priority date: 2023-07-30
Filing date: 2023-07-30
Publication date: 2023-12-22
Anticipated expiration: 2033-07-30

Abstract

The utility model provides a polarization maintaining optical fiber isolator, which comprises an isolator shell, wherein a mounting groove is formed in the isolator shell, a connecting column is fixedly connected to the inner wall of one side of the mounting groove, an elastic groove is formed in the connecting column, a spring is fixedly connected to the inner wall of one side of the mounting groove, a push-pull block fixedly connected to one end of the pull rod is driven to move by stirring two pull rods, then the spring is continuously compressed, a clamping claw fixedly connected to one section of a fixing plate is opened through the stirring acting force of the pull rod, when the polarization maintaining optical fiber is inserted into a leading-in groove, the acting force of the pull rod is released, the spring makes rebound movement and drives the push-pull block and the clamping claw fixedly connected to one end of the push-pull block to retract to the original position, and the polarization maintaining optical fiber is clamped.

Description

Polarization maintaining fiber isolator

Technical Field

The utility model belongs to the technical field of optical fiber communication, and particularly relates to a polarization maintaining optical fiber isolator.

Background

The polarization maintaining optical fiber transmits linearly polarized light and is widely used in various fields of national economy such as aerospace, aviation, navigation, industrial manufacturing technology and communication. In an interference type optical fiber sensor based on optical coherent detection, a polarization maintaining optical fiber is used to ensure that the linear polarization direction is unchanged and improve the coherent signal to noise ratio so as to realize high-precision measurement of physical quantity. The polarization maintaining fiber is used as a special fiber and is mainly applied to sensors such as fiber gyroscopes, fiber hydrophones and the like and fiber communication systems such as DWDM, EDFA and the like. Because the fiber optic gyroscope, the fiber optic hydrophone and the like can be used for military inertial navigation and sonar, the fiber optic gyroscope belongs to a high-tech product, and the polarization maintaining fiber is a core component.

The utility model discloses a polarization maintaining optical fiber array isolator, which is characterized in that the polarization maintaining optical fiber array is used for replacing common optical fibers, the polarization state of transmitted light is not changed, the optical fiber array comprises a plurality of polarization maintaining optical fibers, the polarization maintaining optical fibers are fixed in a substrate by using glue and are tightly pressed by a cover plate, the isolator is directly adhered to the polarization maintaining optical fibers by using glue, the isolator comprises a first optical rotator, a first polarizer, a second optical rotator and a second polarizer, the first optical rotator and the second polarizer isolate reflected light, the polarization direction of the transmitted light passing through the isolator is rotated into the horizontal direction, and the transmitted light is ensured to be successfully coupled into the polarization maintaining optical fibers, so that the polarization maintaining optical fiber array isolator and the polarization maintaining optical fibers are good in connection effect.

According to the technical scheme, the polarization maintaining optical fiber is fixed in the base plate by using the glue and is tightly pressed by the cover plate, and the isolator is directly adhered to the polarization maintaining optical fiber by using the glue, but after the glue is solidified, the polarization maintaining optical fiber is easy to deform under the complex environment condition of cold and hot change (such as high water vapor or under the action of stress), so that the polarization maintaining optical fiber is shifted, and the using firmness of the polarization maintaining optical fiber is reduced.

Disclosure of Invention

The utility model aims to provide a polarization maintaining optical fiber isolator, which aims to solve the problems that after the isolator in the prior art is used for a long time, the performance of glue is greatly reduced, the solidified glue is easy to deform under the complex environment condition of cold and hot change, the polarization maintaining optical fiber is easy to shift, and the firmness of the polarization maintaining optical fiber is reduced.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a polarization maintaining optical fiber isolator, includes the isolator shell, the mounting groove has been seted up in the isolator shell, one side inner wall fixedly connected with spliced pole of mounting groove, the elastic cell has been seted up in the spliced pole, one side inner wall fixedly connected with telescopic link of mounting groove, one side inner wall fixedly connected with spring of mounting groove, the circumference surface of telescopic link is located to the spring housing, one side inner wall fixedly connected with polarizer of mounting groove, one side inner wall of mounting groove is provided with magnetic spin glass, one side inner wall fixedly connected with polarization analyzer of mounting groove.

As a preferable scheme of the utility model, one end of the spring is fixedly connected with a push-pull block, and the circumferential surface of the push-pull block is fixedly connected with a pull rod.

As a preferable scheme of the utility model, one end of the push-pull block is fixedly connected with two fixing plates, and one end of each fixing plate is fixedly connected with a clamping claw.

As a preferable scheme of the utility model, the two ends of the pull rod are fixedly connected with the light-proof plates.

As a preferable scheme of the utility model, two backing plates are fixedly connected to the inner wall of one side of the mounting groove.

As a preferable scheme of the utility model, one end of the isolator shell is fixedly connected with an ingress pipe, and the circumferential surface of the ingress pipe is fixedly connected with a rubber sleeve.

As a preferable scheme of the utility model, two propping blocks are fixedly connected to the inner wall of one side of the mounting groove.

As a preferable scheme of the utility model, the circumference surface of the clamping claw is fixedly connected with a protection pad.

As a preferable scheme of the utility model, a sliding groove is formed in one side inner wall of the mounting groove, and a guiding groove is formed in one side inner wall of the mounting groove.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the polarization maintaining optical fiber isolator, the push-pull block fixedly connected to one end of the pull rod is driven to move by stirring the two pull rods, then the spring fixedly connected to one end of the push-pull block is continuously compressed, at the moment, the clamping claw fixedly connected to one section of the fixed plate is opened through the stirring acting force of the pull rod, when the polarization maintaining optical fiber is inserted into the guide groove, the acting force of the stirring pull rod is released when the polarization maintaining optical fiber reaches a proper position, the spring is in rebound motion and drives the push-pull block and the clamping claw fixedly connected to one end of the push-pull block to retract to the original position, and the polarization maintaining optical fiber is clamped.

2. According to the polarization maintaining optical fiber isolator, the spring elasticity is prevented from being too high by being fixedly connected in the clamping claw, so that the clamping force of the clamping claw is increased, the polarization maintaining optical fiber is damaged during long-time use, the service life of the device is prolonged, and the polarization analyzer can be more stable during long-time use through the abutting blocks fixedly connected to the inner wall of one side of the mounting groove.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a first perspective view of the present utility model in a principal cut away;

fig. 3 is a partial enlarged view of fig. 2 a in the present utility model:

fig. 4 is a side perspective view of the present utility model.

The figure shows: 1. an isolator housing; 2. a mounting groove; 3. a connecting column; 4. an elastic groove; 5. a telescopic rod; 6. a spring; 7. a push-pull block; 8. a pull rod; 9. a sliding groove; 10. a fixing plate; 11. clamping claws; 12. an introduction groove; 13. an ingress pipe; 14. a rubber sleeve; 15. a light-proof plate; 16. a polarizer; 17. a backing plate; 18. magnetic spin glass; 19. an abutment block; 20. an analyzer; 21. and a protective pad.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, an embodiment of the present utility model provides a polarization maintaining optical fiber isolator, which includes an isolator shell 1, wherein a mounting groove 2 is formed in the isolator shell 1, a connecting post 3 is fixedly connected to one side inner wall of the mounting groove 2, an elastic groove 4 is formed in the connecting post 3, a telescopic rod 5 is fixedly connected to one side inner wall of the mounting groove 2, a spring 6 is fixedly connected to one side inner wall of the mounting groove 2, the spring 6 is sleeved on the circumferential surface of the telescopic rod 5, one end of the spring 6 is fixedly connected with a push-pull block 7, the circumferential surface of the push-pull block 7 is fixedly connected with a pull rod 8, one end of the push-pull block 7 is fixedly connected with two fixing plates 10, one end of the two fixing plates 10 is fixedly connected with a clamping claw 11, a sliding groove 9 is formed in one side inner wall of the mounting groove 2, a guiding groove 12 is formed in one side inner wall of the mounting groove 2, a polarizer 16 is fixedly connected to one side inner wall of the mounting groove 2, a magnetic rotation glass 18 is arranged in one side inner wall of the mounting groove 2, and a polarization analyzer 20 is fixedly connected to one side inner wall of the mounting groove 2. In this embodiment, through stirring two pull rods 8 and driving push-pull block 7 of fixed connection in pull rod 8 one end to one side remove, in the in-process that moves to one side, thereby fixed connection is at the holding jaw 11 of push-pull block 7 one end reaches and opens under the effort of stirring, and fixed connection is at the telescopic link 5 and the spring 6 of push-pull block 7 one section and is continuously compressing, then insert polarization maintaining fiber into leading-in groove 12 and extend, when reaching suitable position, through loosening the effort of stirring two pull rods 8, spring 6 kick-backs and drive the holding jaw 11 of fixed connection in push-pull block 7 one end to retract to original position centre gripping and fixing polarization maintaining fiber, and in actual use, above-mentioned parts are equipped with the multiunit, can prevent through above-mentioned device that the optic fibre that the isolator is fixed when various environmental conditions use is not firm enough, the problem of easy looseness.

Referring to fig. 4, the light-proof plates 15 are fixedly connected to two ends of the pull rod 8, and the light-proof plates 15 fixedly connected to two ends of the pull rod 8 can prevent the pull rod 8 from being influenced by the outside when the polarization maintaining fiber is clamped. Two backing plates 17 are fixedly connected to one side inner wall of the installation groove 2, and the two backing plates 17 which are fixedly connected to one side inner wall of the installation groove 2 can prevent the magneto-optical glass 18 from directly contacting one side inner wall of the installation groove 2, so that damage is caused, and the problem that the device cannot be used due to the fact that the polarizer 16, the magneto-optical glass 18 and the polarization analyzer 20 are not on the same plane can be solved.

Referring to fig. 1 to 4, an inlet pipe 13 is fixedly connected to one end of the isolator housing 1, a rubber sleeve 14 is fixedly connected to a circumferential surface of the inlet pipe 13, and reflected light can be isolated by the rubber sleeve 14 fixedly connected to the circumferential surface of the inlet pipe 13, so that the polarization maintaining fiber can be transmitted in a single direction. Two abutting blocks 19 are fixedly connected to the inner wall of one side of the mounting groove 2, and a protection pad 21 is fixedly connected to the circumferential surface of the clamping claw 11. The abutting block 19 fixedly connected to the inner wall on one side of the mounting groove 2 can enable the analyzer 20 to be more stable in long-time use, and the protection pad 21 fixedly connected to the circumferential surface of the clamping claw 11 can prevent the clamping force of the clamping claw 11 from becoming large due to overlarge elasticity of the spring 6, so that the optical fiber is damaged in long-time use, and the service life of the device is prolonged.

The working principle and the using flow of the utility model are as follows: the pull rod 8 is shifted to slide in the sliding groove 9 and drives the spring 6 fixedly connected to one end of the push-pull block 7 to move, in the moving process, the clamping claw 11 fixedly connected to the other end of the push-pull block 7 is opened under the shifting acting force, the spring 6 is continuously compressed, then the polarization-maintaining optical fiber is led into the leading-in groove 12, the shifting of the pull rod 8 is released, the spring 6 rebounds to rebound the clamping claw 11 to the original position to clamp and fix the optical fiber, and the fixing firmness of the optical fiber is realized through the device.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A polarization maintaining fiber isolator, comprising an isolator shell (1), characterized in that: install mounting groove (2) have been seted up in isolator shell (1), one side inner wall fixedly connected with spliced pole (3) of mounting groove (2), elastic groove (4) have been seted up in spliced pole (3), one side inner wall fixedly connected with telescopic link (5) of mounting groove (2), one side inner wall fixedly connected spring (6) of mounting groove (2), the circumference surface of telescopic link (5) is located to spring (6) cover, one side inner wall fixedly connected with polarizer (16) of mounting groove (2), one side inner wall of mounting groove (2) is provided with magnetic rotation optical glass (18), one side inner wall fixedly connected with analyzer (20) of mounting groove (2).

2. The polarization maintaining fiber isolator according to claim 1, wherein: one end of the spring (6) is fixedly connected with a push-pull block (7), and the circumferential surface of the push-pull block (7) is fixedly connected with a pull rod (8).

3. The polarization maintaining fiber isolator according to claim 2, wherein: one end of the push-pull block (7) is fixedly connected with two fixing plates (10), and one end of each fixing plate (10) is fixedly connected with a clamping claw (11).

4. The polarization maintaining fiber isolator according to claim 2, wherein: the two ends of the pull rod (8) are fixedly connected with light-proof plates (15).

5. The polarization maintaining fiber isolator according to claim 1, wherein: two backing plates (17) are fixedly connected to the inner wall of one side of the mounting groove (2).

6. The polarization maintaining fiber isolator according to claim 1, wherein: one end of the isolator shell (1) is fixedly connected with an ingress pipe (13), and the circumferential surface of the ingress pipe (13) is fixedly connected with a rubber sleeve (14).

7. The polarization maintaining fiber isolator according to claim 1, wherein: two propping blocks (19) are fixedly connected to the inner wall of one side of the mounting groove (2).

8. A polarization maintaining fiber isolator according to claim 3, wherein: the circumference surface of the clamping claw (11) is fixedly connected with a protection pad (21).

9. The polarization maintaining fiber isolator according to claim 1, wherein: the sliding groove (9) is formed in the inner wall of one side of the mounting groove (2), and the guiding groove (12) is formed in the inner wall of one side of the mounting groove (2).