Self-injection locking distributed feedback single-frequency fiber laser

Abstract

The invention discloses a self-injection locking distributed feedback single-frequency optical fiber laser, and belongs to the technical field of single-frequency optical fiber lasers, the self-injection locking distributed feedback single-frequency optical fiber laser comprises a laser body and an optical fiber patch cord, the side wall of the laser body is provided with an interface, the optical fiber patch cord is matched with the interface, and the optical fiber patch cord is matched with the interface. A cleaning box is arranged outside the interface, a cleaning cavity is formed in the cleaning box, the two ends of the cleaning cavity are open, the optical fiber patch cord and the interface extend into the cleaning cavity, a moving hole is formed in the side wall of the cleaning box, a moving block is slidably connected into the moving hole, a working cavity is formed in the moving block, and the working cavity is communicated with the cleaning cavity. And a grip is arranged on the side wall of the moving block. According to the self-injection locking distributed feedback single-frequency fiber laser, the cleaning box is arranged at the position of the interface of the laser body, the interface of the laser body and the optical fiber patch cord can be cleaned at the same time, the cleaning efficiency is improved, and therefore the performance of the self-injection locking distributed feedback single-frequency fiber laser is improved.

Description

Technical Field

[0001] This invention belongs to the field of single-frequency fiber laser technology, specifically relating to a self-injection locked distributed feedback single-frequency fiber laser. Background Technology

[0002] The self-injection-locked distributed feedback single-frequency fiber laser is a high-performance fiber laser that combines a distributed feedback (DFB) structure with self-injection-locking technology. Its core objective is to achieve single-frequency laser output with ultra-narrow linewidth, high frequency stability, and low phase noise, making it suitable for applications such as precision measurement, optical communication, and spectroscopy.

[0003] Self-injection locking design avoids the complexity of introducing an additional coupler at the output end in traditional methods, thus improving system efficiency. Distributed feedback (DFB), on the other hand, introduces a periodic structure in the gain medium to achieve the "distribution" and "selectivity" of optical feedback, thereby stabilizing the output of single-longitudinal-mode laser.

[0004] When using a self-injected locked distributed feedback (DFB) single-frequency fiber laser, it is first necessary to install it on a stable platform. Then, the laser is connected to the application equipment using fiber optic patch cords. To ensure the transmission performance of the laser, it is best to clean the output port of the laser and the end face of the fiber optic cable separately before connecting the patch cords. However, since the two are cleaned separately, when cleaning one area and then moving on to the other, the cleaned area needs to be sealed with a dust plug. After cleaning the other area, the dust plug is removed, and then the two are connected. The whole process is not only somewhat cumbersome, but also may cause the cleaned area to be contaminated again due to the dust plug being ignored. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a self-injection locked distributed feedback single-frequency fiber laser.

[0006] The technical solution adopted to solve the above technical problems is: A self-injection locked distributed feedback single-frequency fiber laser includes a laser body and fiber optic patch cords. The laser body has an interface on its sidewall, and the fiber optic patch cord matches the interface. A cleaning box is installed outside the interface, and a cleaning cavity is formed within the cleaning box. Both ends of the cleaning cavity are open. The fiber optic patch cord and the interface extend into the cleaning cavity. A motion hole is formed on the sidewall of the cleaning box, and a motion block is slidably connected to the motion hole. A working cavity is formed within the motion block. A handle is provided on the sidewall of the motion block, and a rotating shaft is fixedly connected to the sidewall of the handle. The rotating shaft passes through the sidewall of the motion block and is fixedly connected to a main bevel gear. Two side bevel gears are also installed in the working cavity, and both side bevel gears mesh with the main bevel gear. Threaded rods are fixedly provided on the sidewalls of both side bevel gears, and motion rings are threadedly connected to the threaded rods. A middle rod is provided at the top of the motion ring, and a top block is fixedly provided at the other end of the middle rod. An internal component and an external component are respectively provided on the sidewalls of the two top blocks. The two side walls of the moving block are respectively provided with corresponding cleaning ports. The two cleaning ports are different sizes. A shielding plate is installed outside each of the two cleaning ports. A moving magnetic plate is provided on the side wall of the shielding plate facing the moving block. A shielding magnetic plate and a vertical magnetic plate are respectively provided on the two side walls of the moving block.

[0007] By using the above technical solution, a cleaning box can be set at the interface of the laser body to clean both the interface of the laser body and the fiber optic patch cord, thereby improving cleaning efficiency and thus improving the performance of the self-injection locked distributed feedback single-frequency fiber laser.

[0008] Furthermore, a telescopic groove is provided at the top of the cleaning chamber, a pressure plate is provided in the telescopic groove, the bottom of the pressure plate abuts against the top of the moving block, and a telescopic component is provided between the pressure plate and the telescopic groove.

[0009] Through the above technical solution, the telescopic component in the telescopic groove can ensure that the pressure plate always remains in the state of abutting against the moving block. The telescopic component can be set as a spring or telescopic rod or other accessories with telescopic ability and can apply downward force to the pressure plate.

[0010] Furthermore, the cleaning chamber is provided with blocking blocks on both sides of the sidewalls. The blocking blocks and the shielding plate are on the same horizontal plane. The shielding plate is arc-shaped at the end facing the blocking block, and the blocking blocks are inclined.

[0011] Through the above technical solution, the blocking block can push the shielding plate as the moving block moves into the cleaning box, thereby changing the position of the shielding plate and achieving the effect of opening or closing the cleaning port.

[0012] Furthermore, the internal component includes a push cylinder and a fixing rod. One end of the push cylinder is rotatably connected to the side wall of the top block, and the other end of the push cylinder has a cleaning groove. The side wall of the push cylinder has a first arc-shaped groove. The fixing rod is fixedly installed in the working cavity and is slidably connected to the inner wall of the first arc-shaped groove. The end of the push cylinder away from the top block is aligned with the corresponding cleaning port position.

[0013] The above technical solution is mainly designed for fiber optic patch cords. Therefore, the pusher with a cleaning groove can clean the connector of the fiber optic patch cord. As the pusher moves forward, it will also rotate to clean due to the first arc groove and the fixing rod, thereby improving the cleaning efficiency of the fiber optic patch cord.

[0014] Furthermore, the external components include a pusher, a drive rod, and a fixed cylinder. The fixed cylinder is fixedly disposed in the working chamber. The longitudinal section of the fixed cylinder is an arc shape with a downward opening. The pusher, drive rod, and top block are all located in the fixed cylinder. The pusher is rotatably connected to the side wall of the top block. One end of the pusher is aligned with the cleaning port. The drive rod is fixedly connected to the end of the pusher away from the cleaning port. A second arc-shaped groove is provided on the inner wall of the fixed cylinder. The drive rod is slidably connected to the inner wall of the second arc-shaped groove.

[0015] The above technical solution is used to clean the interface of the laser body. The pusher is designed to clean the inside of the interface better. Similar to the internal components, the pusher will rotate during its forward movement under the combined action of the drive rod and the second arc groove, which improves the cleaning efficiency.

[0016] Furthermore, a sliding rod is fixedly connected to the side wall of the barrier block, and a sliding groove is provided on the side wall of the cleaning chamber, with the sliding rod slidably connected to the inner wall of the sliding groove.

[0017] Through the above technical solution, the cooperation between the slider and the groove makes the movement of the blocking block smoother. The slider and groove here can be set to a more stable sliding structure such as "T" shape, which does not affect the implementation of this application. The sliding blocking block makes its blocking effect on the shielding plate more gentle and will not damage the shielding plate.

[0018] Furthermore, a rotating rod is fixedly installed on the side wall of the shielding plate. The rotating rod passes through the side wall of the working cavity. Two upright blocks are provided at the bottom of the working cavity. The rotating rod is rotatably connected to the side wall of the upright blocks. A one-way bearing is installed in the upright block. A connecting rod is provided at the other end of the one-way bearing.

[0019] With the above technical solution, the one-way bearing and connecting rod are designed so that the rotating rod will drive the connecting rod and worm gear to rotate only when the blocking plate is opened. When the blocking plate is blocked by the blocking block and returns to the blocking state, the rotating rod will still rotate, but it will not drive the connecting rod to rotate.

[0020] Furthermore, a worm gear is provided at the end of the connecting rod away from the one-way bearing. A worm wheel is rotatably connected in the working chamber. A bottom gear is fixedly connected to the side wall of the worm wheel. The worm wheel meshes with the worm gear. Two rotating cylinders are also rotatably connected to the side wall of the working chamber. A top gear is fixedly connected to the side wall of each of the two rotating cylinders. The bottom gear meshes with both top gears. An ultra-fine cleaning cloth is wound between the two rotating cylinders. A rotating cavity is opened on the side wall of the moving block. The ultra-fine cleaning cloth passes through the rotating cavity and wraps around from one side wall of the rotating cylinder to the other side wall of the rotating cylinder. The rotating cavity is connected to both cleaning ports.

[0021] With the above technical solution, the same roll of ultrafine cleaning cloth is wound on the two rotating drums. Therefore, when the worm gear drives the bottom gear to rotate, the two top gears meshing with it will also drive the two rotating drums to rotate. This causes the ultrafine cleaning cloth to move from one rotating drum to another around the rotating cavity. During this process, the ultrafine cleaning cloth at the corresponding cleaning port of the push cylinder and push needle will be replaced with a new part, which facilitates the push cylinder and push needle to move outward for cleaning.

[0022] Furthermore, the two rotating drums are at the same height, the inner component and the outer component are also at the same height, and the height of the rotating drum is greater than the height of the inner component.

[0023] According to the above technical solution, in order to facilitate the movement of the ultra-fine cleaning cloth and the transmission between the bottom gear and the top gear, it is more appropriate to set two rotating drums at the same height. Moreover, in order to ensure that the movement of the pusher and the pusher needle is not affected, the rotating drum and the ultra-fine cleaning cloth are best set at a high position.

[0024] Furthermore, the shielding magnetic sheet is located on one side of the cleaning port, the shielding magnetic sheet is at the same height as the cleaning port, and the vertical magnetic sheet is located directly above the rotating rod.

[0025] Through the above technical solution, the vertical magnetic sheet and the shielding magnetic sheet play different roles. The shielding magnetic sheet set on one side of the cleaning port can attract the shielding sheet to the cleaning port position, thereby protecting the ultra-fine cleaning cloth inside the rotating cavity of the cleaning port. The vertical magnetic sheet, on the other hand, plays a role in fixing the shielding sheet after it is opened.

[0026] The beneficial effects of this invention are as follows: (1) By setting a cleaning box at the interface position of the laser body, the present invention can clean the interface of the laser body and the fiber optic jumper at the same time. The internal components and external components are designed for the interface and the fiber optic jumper respectively. The ultra-fine cleaning cloth used can also ensure the cleaning effect. At the same time, the cleaning can improve the cleaning efficiency, thereby improving the performance of the self-injection locked distributed feedback single-frequency fiber laser. (2) The present invention winds the same roll of ultrafine cleaning cloth around two rotating drums, so that when the worm gear drives the bottom gear to rotate, the two top gears meshing with it will also drive the two rotating drums to rotate, thereby causing the ultrafine cleaning cloth to move from one rotating drum to another around the rotating cavity. During this process, the ultrafine cleaning cloth at the cleaning port of the pusher and the pusher pin will be replaced, avoiding the ultrafine cleaning cloth from being contaminated by the dust entering from the cleaning port, thus making it easier for the pusher and the pusher pin to better clean the interface and fiber optic patch cord. (3) By setting up a vertical magnetic sheet, a shielding magnetic sheet and a moving magnetic sheet, the connection between the shielding sheet and the moving block is more stable. The vertical magnetic sheet and the shielding magnetic sheet play different roles for the moving magnetic sheet and the shielding sheet respectively. The shielding magnetic sheet set on the side of the cleaning port can attract the shielding sheet to the cleaning port position, thereby protecting the ultra-fine cleaning cloth inside the rotating cavity in the cleaning port. The vertical magnetic sheet plays a fixing role for the shielding sheet after the shielding sheet is opened. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structural connection between the cleaning box and the moving block in this invention; Figure 3 This is a cross-sectional view of the cleaning chamber in this invention; Figure 4 This is a schematic diagram of the internal structure and connections of the working chamber in this invention; Figure 5 This is a schematic diagram of the internal components in this invention; Figure 6 This is a schematic diagram of the structural connection between the main bevel gear and the two side bevel gears in this invention; Figure 7 This is a schematic diagram of the structural connection of the external components in this invention; Figure 8 yes Figure 7 A magnified view of a section at point A in the middle; Figure 9 This is a schematic diagram showing the positions of the moving magnetic sheet, the blocking magnetic sheet, and the vertical magnetic sheet in this invention.

[0028] Reference numerals: 1. Laser body; 2. Fiber optic patch cord; 3. Interface; 4. Cleaning box; 5. Motion hole; 6. Motion block; 7. Handle; 8. Shaft; 9. Main bevel gear; 10. Side bevel gear; 11. Threaded rod; 12. Motion ring; 13. Intermediate rod; 14. Top block; 15. Cleaning port; 16. Shielding plate; 17. Motion magnetic plate; 18. Shielding magnetic plate; 19. Vertical magnetic plate; 20. Telescopic groove; 21. Pressure plate; 22. Telescopic component; 23. Barrier block; 24. Push cylinder; 25. Fixing rod; 26. Cleaning tank; 27. First arc-shaped groove; 28. Push needle; 29. ​​Driving rod; 30. Fixing cylinder; 31. Second arc-shaped groove; 32. Sliding rod; 33. Sliding groove; 34. Rotating rod; 35. Vertical block; 36. One-way bearing; 37. Connecting rod; 38. Worm gear; 40. Worm wheel; 41. Bottom gear; 42. Rotating cylinder; 43. Top gear; 44. Ultrafine cleaning cloth; 45. Rotating cavity. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] like Figures 1-3 As shown in this embodiment, a self-injection locked distributed feedback single-frequency fiber laser includes a laser body 1 and a fiber optic patch cord 2. The side wall of the laser body 1 is provided with an interface 3. The fiber optic patch cord 2 is matched with the interface 3. A cleaning box 4 is installed outside the interface 3. A cleaning cavity is opened in the cleaning box 4. Both ends of the cleaning cavity are open. The fiber optic patch cord 2 and the interface 3 respectively extend into the cleaning cavity. A motion hole 5 is opened on the side wall of the cleaning box 4. A motion block 6 is slidably connected in the motion hole 5. A telescopic groove 20 is provided at the top of the cleaning cavity. A pressure plate 21 is provided in the telescopic groove 20. The bottom of the pressure plate 21 abuts against the top of the motion block 6. A telescopic component 22 is provided between the pressure plate 21 and the telescopic groove 20. The telescopic component 22 in the telescopic groove 20 can ensure that the pressure plate 21 always remains against the motion block 6. The telescopic component 22 can be set as a spring or a telescopic rod or other accessories with telescopic ability that can apply a downward force to the pressure plate 21.

[0031] Reference Figure 4 The moving block 6 has a working cavity, and a handle 7 is provided on the side wall of the moving block 6. A rotating shaft 8 is fixedly connected to the side wall of the handle 7. A torsion spring can be provided on the outside of the rotating shaft 8. With the help of the elastic force of the torsion spring, the operator can remove the force on the handle 7 and the rotating shaft 8 will twist back to its original position.

[0032] Reference Figures 4-6The rotating shaft 8 passes through the side wall of the moving block 6 and is fixedly connected to the main bevel gear 9. Two side bevel gears 10 are also installed in the working cavity. Both side bevel gears 10 mesh with the main bevel gear 9. Threaded rods 11 are fixedly installed on the side walls of both side bevel gears 10. A moving ring 12 is threadedly connected to the threaded rod 11. An intermediate rod 13 is installed at the top of the moving ring 12. A top block 14 is fixedly installed at the other end of the intermediate rod 13. The side walls of the two top blocks 14 are respectively provided with an inner component and an outer component. Although the limiting means for the combination of the moving ring 12, intermediate rod 13 and top block 14 are not mentioned above, both the inner component and the outer component have limiting means for the push needle 28 and the push cylinder 24. Therefore, there is no need to worry that the moving ring 12, intermediate rod 13 and top block 14 will rotate around the threaded rod 11.

[0033] Combination Figure 5 The internal components include a push cylinder 24 and a fixing rod 25. One end of the push cylinder 24 is rotatably connected to the side wall of the top block 14, and the other end of the push cylinder 24 has a cleaning groove 26. The side wall of the push cylinder 24 has a first arc-shaped groove 27. The fixing rod 25 is fixedly installed in the working cavity and is slidably connected to the inner wall of the first arc-shaped groove 27. The end of the push cylinder 24 away from the top block 14 is aligned with the corresponding cleaning port 15. The internal components are mainly oriented towards the fiber optic patch cord 2. Therefore, the push cylinder 24 with the cleaning groove 26 can clean the connector of the fiber optic patch cord 2. As the push cylinder 24 moves forward, it will also rotate for cleaning due to the first arc-shaped groove 27 and the fixing rod 25, thereby improving the cleaning efficiency of the fiber optic patch cord 2.

[0034] Reference Figure 7 and Figure 8 As shown, the external component includes a pusher 28, a drive rod 29, and a fixed cylinder 30. The fixed cylinder 30 is fixedly installed in the working cavity. The longitudinal section of the fixed cylinder 30 is an arc shape with a downward opening. The pusher 28, the drive rod 29, and the top block 14 are all located in the fixed cylinder 30. The pusher 28 is rotatably connected to the side wall of the top block 14. One end of the pusher 28 is aligned with the cleaning port 15. The drive rod 29 is fixedly connected to the end of the pusher 28 away from the cleaning port 15. A second arc-shaped groove 31 is provided on the inner wall of the fixed cylinder 30. The drive rod 29 is slidably connected to the inner wall of the second arc-shaped groove 31. The external component is mainly used to clean the interface 3 of the laser body 1. The pusher 28 is designed to better clean the inside of the interface 3. Similar to the internal component, the pusher 28 will also rotate during its forward movement under the combined action of the drive rod 29 and the second arc-shaped groove 31, thereby improving the cleaning efficiency.

[0035] Reference Figure 2 and Figure 3As shown, the two side walls of the moving block 6 are respectively provided with corresponding cleaning ports 15. The two cleaning ports 15 are of different sizes, and a shielding plate 16 is installed outside each of the two cleaning ports 15. A blocking block 23 is respectively provided on the two side walls of the cleaning chamber. The blocking block 23 and the shielding plate 16 are on the same horizontal plane. The end of the shielding plate 16 facing the blocking block 23 is arc-shaped, and the blocking block 23 is inclined. The side wall of the blocking block 23 is also arc-shaped. The blocking block 23 can push the shielding plate 16 as the moving block 6 moves into the cleaning box 4, thereby... This allows the shielding plate 16 to change position, thus opening or closing the cleaning port 15. A sliding rod 32 is fixedly connected to the side wall of the blocking block 23, and a sliding groove 33 is provided on the side wall of the cleaning chamber. The sliding rod 32 is slidably connected to the inner wall of the sliding groove 33. The cooperation between the sliding rod 32 and the sliding groove 33 makes the movement of the blocking block 23 smoother. The sliding block and the sliding groove 33 here can be set to a more stable sliding structure such as a "T" shape, which does not affect the implementation of this application. The sliding blocking block 23 makes its blocking effect on the shielding plate 16 more gentle and will not damage the shielding plate 16.

[0036] Combination Figure 4 The contents of the document are as follows: A rotating rod 34 is fixedly installed on the side wall of the shielding plate 16. The rotating rod 34 passes through the side wall of the working chamber. Two upright blocks 35 are installed at the bottom of the working chamber. The rotating rod 34 is rotatably connected to the side wall of the upright blocks 35. A one-way bearing 36 is installed in the upright block 35. A connecting rod 37 is installed at the other end of the one-way bearing 36. The arrangement of the one-way bearing 36 and the connecting rod 37 ensures that the rotating rod 34 will drive the connecting rod 37 and the worm gear 38 to rotate only when the shielding plate 16 is opened. When the shielding plate 16 is blocked by the blocking block 23 and returns to the shielding state, the rotating rod 34 will still rotate, but it will not drive the connecting rod 37 to rotate.

[0037] from Figures 4-6 As shown in the content, a worm gear 38 is provided at the end of the connecting rod 37 away from the one-way bearing 36. A worm wheel 40 is rotatably connected in the working chamber. A bottom gear 41 is fixedly connected to the side wall of the worm wheel 40. The worm wheel 40 meshes with the worm gear 38. Two rotating drums 42 are also rotatably connected to the side wall of the working chamber. The two rotating drums 42 are at the same height. The inner component and the outer component are also at the same height. The height of the rotating drum 42 is greater than the height of the inner component. In order to facilitate the movement of the ultrafine cleaning cloth 44 and the transmission between the bottom gear 41 and the top gear 43, it is more appropriate to set the two rotating drums 42 at the same height. Moreover, in order to ensure that it will not affect the movement of the push cylinder 24 and the push needle 28, the rotating drum 42 and the ultrafine cleaning cloth 44 are preferably set at a high position.

[0038] Both rotating drums 42 are fixedly connected to top gears 43 on their side walls. Bottom gears 41 mesh with both top gears 43. A fine cleaning cloth 44 is wound around both rotating drums 42. A rotating cavity 45 is opened on the side wall of the moving block 6. The fine cleaning cloth 44 passes through the rotating cavity 45 and moves from one side wall of rotating drum 42 to the other side wall of rotating drum 42. The rotating cavity 45 is connected to both cleaning ports 15. The same roll of fine cleaning cloth 44 is wound on both rotating drums 42. Therefore, when the worm gear 40 drives the bottom gear 41 to rotate, the two top gears 43 meshing with it will also drive the two rotating drums 42 to rotate. This causes the fine cleaning cloth 44 to move around the rotating cavity 45 from one rotating drum 42 to the other. During this process, the fine cleaning cloth 44 at the corresponding cleaning ports 15 of the push cylinder 24 and push needle 28 will be replaced with a new part, which facilitates the push cylinder 24 and push needle 28 to move outward for cleaning.

[0039] Reference Figure 9 As shown, a moving magnetic sheet 17 is provided on the side wall of the shielding plate 16 facing the moving block 6. Shielding magnetic sheets 18 and vertical magnetic sheets 19 are respectively provided on the two side walls of the moving block 6. The shielding magnetic sheet 18 is located on one side of the cleaning port 15, and the height of the shielding magnetic sheet 18 is the same as that of the cleaning port 15. The vertical magnetic sheet 19 is located directly above the rotating rod 34. The vertical magnetic sheet 19 and the shielding magnetic sheet 18 play different roles. The shielding magnetic sheet 18, located on one side of the cleaning port 15, can attract the shielding plate 16 to the position of the cleaning port 15, thereby protecting the ultra-fine cleaning cloth 44 inside the rotating cavity 45 in the cleaning port 15. The vertical magnetic sheet 19, on the other hand, fixes the shielding plate 16 after it is opened.

[0040] The working principle of this embodiment is as follows: First, the fiber optic patch cord 2 and the interface 3 are inserted into the open sides of the cleaning box 4 respectively. Before that, the moving block 6 has not been fully inserted into the moving hole 5. After the fiber optic patch cord 2 and the interface 3 are installed, the staff can push the moving block 6 into the cleaning box 4. At this time, the shielding plate 16 blocks the position of the cleaning port 15 because the moving magnetic plate 17 and the shielding magnetic plate 18 attract each other. As the moving block 6 moves forward, the blocking block 23 is pushed by the shielding plate 16. When the blocking block 23 moves to the end of the slide 33, the blocking block 23 will turn around and block the shielding plate 16, thereby causing the shielding plate 16 to rotate around the rotating rod 34. The moving magnetic plate 17 on the side wall of the shielding plate 16 will leave the shielding magnetic plate 18. When the shielding plate 16 moves to the vertical position, the cleaning port 15 is opened, and the moving magnetic plate 17 will attract the vertical magnetic plate 19, so that the shielding plate 16 remains in the current vertical position. At the same time, the rotation of the shielding plate 16 will cause the rotating rod 34 to rotate together. Under the action of the one-way bearing 36, the connecting rod 37 will also rotate. The worm gear 38 set on the connecting rod 37 will drive the worm wheel 40 to rotate. The bottom gear 41 fixed on the side wall of the worm wheel 40 will rotate under the drive of the worm wheel 40. The two top gears 43 meshing with the bottom gear 41 will drive the two rotating drums 42 to rotate together under the drive of the bottom gear 41. This will cause the ultra-fine cleaning cloth 44 around the rotating drum 42 to move in the rotating cavity 45, thereby moving a new part of the roll of ultra-fine cleaning cloth 44 to the cleaning port 15 position. When the moving block 6 is pushed to the designated position, the operator can rotate the handle 7. The rotating shaft 8 fixed on the side wall of the handle 7 will drive the main bevel gear 9 to rotate. The side bevel gear 10 meshing with the main bevel gear 9 will drive the threaded rod 11 to rotate. The moving ring 12 set on the threaded rod 11 will cause the middle rod 13 and the top block 14 to move together toward the cleaning port 15. The push cylinder 24 used to clean the fiber optic patch cord 2 will rotate under the cooperation of the fixed rod 25 and the first arc groove 27. At the same time, the push cylinder 24 moving outward through the cleaning port 15 will push the ultra-fine cleaning cloth 44 outward together, thereby cleaning the fiber optic patch cord 2 more efficiently. Meanwhile, the push pin 28 used for cleaning interface 3 will also rotate in cooperation with the drive rod 29 and the second arc groove 31, while leading the ultra-fine cleaning cloth 44 to clean the inside of interface 3.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A self-injection-locked distributed feedback single-frequency fiber laser, comprising a laser body (1) and fiber optic patch cords (2), wherein an interface (3) is provided on the sidewall of the laser body (1), and the fiber optic patch cords (2) are matched with the interface (3), characterized in that: A cleaning box (4) is installed outside the interface (3). A cleaning cavity is opened in the cleaning box (4). Both ends of the cleaning cavity are open. The fiber optic patch cord (2) and the interface (3) extend into the cleaning cavity respectively. A motion hole (5) is opened on the side wall of the cleaning box (4). A motion block (6) is slidably connected in the motion hole (5). A working cavity is opened in the motion block (6). A handle (7) is provided on the side wall of the motion block (6). A rotating shaft (8) is fixedly connected to the side wall of the handle (7). The rotating shaft (8) passes through the side of the motion block (6). The wall is fixedly connected to the main bevel gear (9), and two side bevel gears (10) are also installed in the working cavity. Both side bevel gears (10) mesh with the main bevel gear (9). Both side bevel gears (10) are fixedly provided with threaded rods (11) on their side walls. A moving ring (12) is threadedly connected to the threaded rod (11). An intermediate rod (13) is provided at the top of the moving ring (12). A top block (14) is fixedly provided at the other end of the intermediate rod (13). The side walls of the two top blocks (14) are respectively provided with an inner component and an outer component. The two side walls of the moving block (6) are respectively provided with corresponding cleaning ports (15). The two cleaning ports (15) are different in size. A shielding plate (16) is installed outside the two cleaning ports (15). A moving magnetic plate (17) is provided on the side wall of the shielding plate (16) facing the moving block (6). A shielding magnetic plate (18) and a vertical magnetic plate (19) are respectively provided on the two side walls of the moving block (6).

2. The self-injection locked distributed feedback single-frequency fiber laser according to claim 1, characterized in that, The top of the cleaning chamber is provided with a telescopic groove (20), and a pressure plate (21) is provided in the telescopic groove (20). The bottom of the pressure plate (21) abuts against the top of the moving block (6), and a telescopic component (22) is provided between the pressure plate (21) and the telescopic groove (20).

3. The self-injection locked distributed feedback single-frequency fiber laser according to claim 1, characterized in that, The cleaning chamber is provided with a blocking block (23) on each side wall. The blocking block (23) and the shield (16) are on the same horizontal plane. The shield (16) is arc-shaped at the end facing the blocking block (23), and the blocking block (23) is inclined.

4. The self-injection locked distributed feedback single-frequency fiber laser according to claim 1, characterized in that, The internal component includes a push cylinder (24) and a fixing rod (25). One end of the push cylinder (24) is rotatably connected to the side wall of the top block (14). The other end of the push cylinder (24) is provided with a cleaning groove (26). The side wall of the push cylinder (24) is provided with a first arc-shaped groove (27). The fixing rod (25) is fixedly installed in the working cavity. The fixing rod (25) is slidably connected to the inner wall of the first arc-shaped groove (27). The end of the push cylinder (24) away from the top block (14) is aligned with the corresponding cleaning port (15).

5. The self-injection locked distributed feedback single-frequency fiber laser according to claim 1, characterized in that, The external components include a pusher (28), a drive rod (29), and a fixed cylinder (30). The fixed cylinder (30) is fixedly installed in the working cavity. The longitudinal section of the fixed cylinder (30) is an arc shape with a downward opening. The pusher (28), the drive rod (29), and the top block (14) are all located in the fixed cylinder (30). The pusher (28) is rotatably connected to the side wall of the top block (14). One end of the pusher (28) is aligned with the cleaning port (15). The drive rod (29) is fixedly connected to the end of the pusher (28) away from the cleaning port (15). The inner wall of the fixed cylinder (30) is provided with a second arc-shaped groove (31). The drive rod (29) is slidably connected to the inner wall of the second arc-shaped groove (31).

6. The self-injection locked distributed feedback single-frequency fiber laser according to claim 3, characterized in that, The side wall of the blocking block (23) is fixedly connected to a sliding rod (32), and the side wall of the cleaning chamber is provided with a sliding groove (33). The sliding rod (32) is slidably connected to the inner wall of the sliding groove (33).

7. The self-injection locked distributed feedback single-frequency fiber laser according to claim 1, characterized in that, A rotating rod (34) is fixedly installed on the side wall of the shielding plate (16). The rotating rod (34) passes through the side wall of the working cavity. Two upright blocks (35) are provided at the bottom of the working cavity. The rotating rod (34) is rotatably connected to the side wall of the upright block (35). A one-way bearing (36) is installed in the upright block (35). A connecting rod (37) is provided at the other end of the one-way bearing (36).

8. The self-injection locked distributed feedback single-frequency fiber laser according to claim 7, characterized in that, A worm gear (38) is provided at the end of the connecting rod (37) away from the one-way bearing (36). A worm wheel (40) is rotatably connected in the working chamber. A bottom gear (41) is fixedly connected to the side wall of the worm wheel (40). The worm wheel (40) meshes with the worm gear (38). Two rotating cylinders (42) are also rotatably connected to the side wall of the working chamber. A top gear (43) is fixedly connected to the side wall of each of the two rotating cylinders (42). The bottom gear (41) meshes with both top gears (43). An ultra-fine cleaning cloth (44) is wound together between the two rotating cylinders (42). A rotating cavity (45) is opened on the side wall of the moving block (6). The ultra-fine cleaning cloth (44) passes through the rotating cavity (45) and wraps around from the side wall of one rotating cylinder (42) to the side wall of the other rotating cylinder (42). The rotating cavity (45) is connected to both cleaning ports (15).

9. The self-injection locked distributed feedback single-frequency fiber laser according to claim 8, characterized in that, The two rotating cylinders (42) are at the same height, the inner component and the outer component are also at the same height, and the height of the rotating cylinder (42) is greater than the height of the inner component.

10. The self-injection locked distributed feedback single-frequency fiber laser according to claim 7, characterized in that, The shielding magnetic sheet (18) is located on one side of the cleaning port (15), and the height of the shielding magnetic sheet (18) is the same as that of the cleaning port (15). The vertical magnetic sheet (19) is located directly above the rotating rod (34).

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