A high-power 976nm multimode fiber laser with vbg wavelength locking

Abstract

The application relates to the technical field of fiber lasers, in particular to a high-power 976nm multimode fiber laser with a VBG wavelength locking function, which comprises a fiber laser, the bottom of the fiber laser is fixed with a base, the end of the base is provided with a swing frame, the top of the swing frame is fixed with a side plate, the inside of the swing frame is provided with a moving groove, a lifting plate is inserted into the moving groove, the bottom of the lifting plate is fixed with an extension plate, the bottom of the moving groove is provided with a through hole, the surface of the lifting plate is fixed with a Z-shaped rod, the surface of the Z-shaped rod is provided with a screw rod, the surface of the screw rod is provided with a clamping groove, the surface of the Z-shaped rod is provided with a moving frame, and the surface of the moving frame is provided with an arc-shaped plate; the other end of the cross plate is moved into the insertion groove, the angle of the swing frame is stabilized, the swing frame and the base function as the base, and the height of the fiber laser is adjusted through the extension plate.

Description

Technical Field

[0001] This invention relates to the field of fiber laser technology, specifically to a VBG-locked wavelength high-power 976nm multimode fiber laser. Background Technology

[0002] A fiber laser is a laser that uses rare-earth-doped glass fiber as the gain medium. Fiber lasers can be developed based on fiber amplifiers: under the action of pump light, a high power density is easily formed in the fiber, causing a "population inversion" of the laser energy level of the laser working material. When a positive feedback loop (forming a resonant cavity) is appropriately added, laser oscillation output can be formed.

[0003] A VBG, or volume Bragg grating, is a Bragg grating written into a bulk material. It utilizes holographic exposure of photothermosensitive refractive glass to create a periodic change in refractive index. Based on the Bragg reflection principle, when the wavelength of the incident light matches the periodicity of the grating's refractive index change, it is reflected by the grating, while the remaining light passes through. The interference between the transmitted and reflected light achieves wavelength locking, enabling the laser to output a stable 976nm wavelength laser beam.

[0004] However, existing fiber lasers are placed inside a transport box during transportation. When in use, they need to be taken out of the transport box and their height needs to be adjusted using a base. This results in the need to carry a large number of other components when using fiber lasers, increasing the difficulty of transportation. Summary of the Invention

[0005] The purpose of this invention is to provide a high-power 976nm multimode fiber laser with VBG wavelength locking, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a VBG-locked wavelength high-power 976nm multimode fiber laser, comprising:

[0007] The fiber laser has a base fixed to its bottom, a swing frame at the end of the base, a side plate fixed to the top of the swing frame, a moving groove inside the swing frame, a lifting plate inserted into the moving groove, a telescopic plate fixed to the bottom of the lifting plate, a through hole at the bottom of the moving groove, a C-shaped rod fixed to the surface of the lifting plate, a screw on the surface of the C-shaped rod, a slot on the surface of the screw, a moving frame on the surface of the C-shaped rod, and an arc-shaped plate on the surface of the moving frame.

[0008] Preferably, the bottom of the base is fixed with a limiting plate, the end of the base is provided with a shaft groove, the inside of the shaft groove is provided with a rotating shaft, the surface of the rotating shaft is fixed to the end of the swing frame, the surface of the swing frame is provided with an elastic plate, one end of the elastic plate is connected to the surface of the base, the elastic plate is elastic, the surface of the swing frame is fixed with a limiting frame, the inside of the limiting frame is inserted with a horizontal plate, and the horizontal plate can move inside the limiting frame.

[0009] Preferably, a first pull ring is fixed to the surface of the side plate, a cross plate is inserted into the inside of the side plate, the cross plate can move inside the side plate, an extension rod is fixed to the surface of the C-shaped rod, a screw is screwed into the extension rod, multiple sets of slots are opened on the surface of the screw, and a limit ring is fixed to the surface of the screw, the limit ring is located at the top and bottom of the extension rod.

[0010] Preferably, the surface of the extension rod is provided with a slot, and a connecting rod is inserted into the surface of the C-shaped rod. The connecting rod can extend and retract on the surface of the C-shaped rod. A spring is provided inside the C-shaped rod, and the spring connects the inside of the C-shaped rod and the end of the connecting rod. A movable frame is fixed to the other end of the connecting rod. The movable frame moves with the connecting rod. A second pull ring is fixed to the surface of the movable frame. An arc-shaped plate is fixed to the surface of the movable frame. The arc-shaped plate moves with the movable frame. A toothed rack is provided on the surface of the arc-shaped plate.

[0011] Preferably, a first magnet is fixed to the end of the horizontal plate, and an insertion groove is provided on the end surface of the base. The first magnet moves with the horizontal plate and can move into the insertion groove. A second magnet is fixed in the insertion groove, and the second magnet and the first magnet are of the same polarity and repel each other.

[0012] Preferably, the bottom of the screw is inserted into the inside of the top holding plate, a limiting ring is provided at the bottom of the screw, and an annular groove is provided inside the top holding plate. The limiting ring at the bottom of the screw is located in the annular groove, so that the end of the screw can rotate inside the top holding plate, and the top holding plate moves up and down with the screw.

[0013] Preferably, after the top plate descends, it abuts against the surface of the horizontal plate. The two ends of the top plate are arc-shaped, and the end of the top plate abuts against the end of the horizontal plate, causing the horizontal plate to move.

[0014] Preferably, the movable groove is provided with a spring, and there are two sets of springs. One end of the spring is connected to the end of the lifting plate, and the other end is connected to the inner wall of the movable groove. The spring exerts a force on the lifting plate, causing the lifting plate to extend out of the movable groove.

[0015] Preferably, the elastic plate pulls the swing frame, causing the swing frame to swing around the pivot, so that the two sets of swing frames move closer to each other, and the swing frame, side plate and base enclose the fiber laser.

[0016] Preferably, the spring at the end of the plug rod exerts a pulling force on the plug rod, causing the plug rod to be inserted into the interior of the C-shaped rod. The moving frame and the arc plate move with the plug rod, and the arc plate can be inserted into the slot. The toothed rack on the surface of the arc plate can be engaged in the slot on the surface of the screw.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention proposes a swing frame that swings around a pivot axis. An elastic plate exerts tension on the swing frame and base, causing the two sets of swing frames to hold together. The two sets of swing frames and the base provide protection, enclosing the fiber laser. When the fiber laser is in use, the swing frame swings around the pivot axis, with the surface of the swing frame pressing against the surface of the limiting plate. Pulling the moving frame releases the arc-shaped plate from its slot, and the teeth on the arc-shaped plate surface no longer engage with the slot. Tightening the screw, which is screwed into the extension plate on the side plate surface, causes the C-shaped rod to move... The moving rod drives the lifting plate to move down in the moving slot. The telescopic plate at the bottom of the lifting plate moves down in the through hole and extends out of the through hole to support the bottom of the fiber laser. The position of the telescopic plate is adjusted by the screw, and the top holding plate at the bottom of the screw descends with the screw. The two ends of the top holding plate hold the ends of the horizontal plate, causing the horizontal plate to move. The horizontal plate moves in the limiting frame, and the other end of the horizontal plate moves into the insertion slot to stabilize the angle of the swing frame. The swing frame and the base function as the base, and the height of the fiber laser is adjusted by the telescopic plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention from another perspective;

[0021] Figure 3 This is a schematic diagram of the swing frame structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the swing frame of the present invention from another perspective;

[0023] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B;

[0024] Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the swing frame of the present invention;

[0026] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point C.

[0027] In the diagram: 1. Fiber laser; 2. Base; 3. Swing frame; 4. Side plate; 5. Shaft groove; 6. Limiting plate; 7. C-shaped rod; 8. Lifting plate; 9. Elastic plate; 10. Rotating shaft; 11. Limiting frame; 12. Horizontal plate; 13. First pull ring; 14. Top holding plate; 15. Screw; 16. Second pull ring; 17. Arc plate; 18. Moving frame; 19. Insertion rod; 20. Slot; 21. Limiting ring; 22. First magnet; 23. Insertion groove; 24. Second magnet; 25. Spring; 26. Telescopic plate; 27. Through hole; 28. Moving groove; 29. ​​Extension rod; 30. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1 to 8 The present invention provides a technical solution:

[0030] Example 1: A high-power 976nm multimode fiber laser with VBG-locked wavelength, comprising: a fiber laser 1, a base 2 fixed to the bottom of the fiber laser 1, a swing frame 3 provided at the end of the base 2, a side plate 4 fixed to the top of the swing frame 3, a moving groove 29 provided inside the swing frame 3, a lifting plate 8 inserted into the moving groove 29, a telescopic plate 27 fixed to the bottom of the lifting plate 8, a through hole 28 provided at the bottom of the moving groove 29, and a C-shaped rod 7 fixed to the surface of the lifting plate 8. A screw 16 is provided, and a slot 15 is provided on the surface of the screw 16. A movable frame 19 is provided on the surface of the C-shaped rod 7, and an arc plate 18 is provided on the surface of the movable frame 19. When the swing frame 3 swings around the rotating shaft 10, the surface of the swing frame 3 presses against the surface of the limiting plate 6. When the movable frame 19 is pulled, the arc plate 18 is no longer pressed against the slot 21, and the teeth on the surface of the arc plate 18 are no longer stuck in the slot 15. When the screw 16 is screwed, the screw 16 is screwed into the extension plate on the surface of the side plate 4, and the screw 16 drives the C-shaped rod 7 to move.

[0031] Example 2: Based on Example 1, a limiting plate 6 is fixed to the bottom of the base 2, and a shaft groove 5 is provided at the end of the base 2. A rotating shaft 10 is provided inside the shaft groove 5. The surface of the rotating shaft 10 is fixed to the end of the swing frame 3. An elastic plate 9 is provided on the surface of the swing frame 3. One end of the elastic plate 9 is connected to the surface of the base 2. The elastic plate 9 is elastic. A limiting frame 11 is fixed to the surface of the swing frame 3. A horizontal plate 12 is inserted into the limiting frame 11. The horizontal plate 12 can move inside the limiting frame 11. A first magnet 23 is fixed to the end of the horizontal plate 12. An insertion groove 24 is provided on the end surface of the base 2. The first magnet 23 moves with the horizontal plate 12 and can move into the insertion groove 24. A second magnet 25 is fixed in the insertion groove 24. The second magnet 25 and the first magnet 23 are aligned. Like poles repel each other. A spring 26 is provided in the moving groove 29. There are two sets of springs 26. One end of the spring 26 is connected to the end of the lifting plate 8, and the other end is connected to the inner wall of the moving groove 29. The spring 26 exerts a force on the lifting plate 8, causing the lifting plate 8 to extend out of the moving groove 29. The elastic plate 9 pulls the swing frame 3, causing the swing frame 3 to swing around the rotating shaft 10, so that the two sets of swing frames 3 are close to each other. The swing frame 3, the side plate 4 and the base 2 enclose the fiber laser 1. The elastic plate 9 exerts a pulling force on the swing frame 3 and the base 2, so that the two sets of swing frames 3 are held together. The two sets of swing frames 3 and the base 2 can play a protective role and enclose the fiber laser 1. When the fiber laser 1 is in use, the swing frame 3 swings around the rotating shaft 10, and the surface of the swing frame 3 is held against the surface of the limiting plate 6.

[0032] A first pull ring 13 is fixed to the surface of the side plate 4. A horizontal plate 12 is inserted into the interior of the side plate 4 and can move within the side plate 4. An extension rod 30 is fixed to the surface of the C-shaped rod 7. A screw 16 is screwed into the extension rod 30. Multiple sets of slots 15 are formed on the surface of the screw 16. A limiting ring 22 is fixed to the surface of the screw 16. The limiting ring 22 is located at the top and bottom of the extension rod 30. The bottom of the screw 16 is inserted into the interior of the top holding plate 14. A limiting ring is provided at the bottom of the screw 16. An annular groove is provided inside the top holding plate 14. The limiting ring at the bottom of the screw 16 is located in the annular groove, so that the end of the screw 16 can move within the top holding plate 14. The internal rotation of 4, and the top plate 14 rises and falls with the screw 16. After the top plate 14 falls, it rests on the surface of the horizontal plate 12. The two ends of the top plate 14 are arc-shaped. After the end of the top plate 14 rests on the end of the horizontal plate 12, the horizontal plate 12 moves. The horizontal plate 12 moves in the limiting frame 11. The other end of the horizontal plate 12 moves into the insertion slot 24, stabilizing the angle of the swing frame 3. The swing frame 3 and the base 2 function as a base. The height of the fiber laser 1 is adjusted by the telescopic plate 27. The first magnet 23 and the second magnet 25 repel each other. After the top plate 14 rises, the end of the horizontal plate 12 moves away from the second magnet 25.

[0033] The extension rod 30 has a slot 21 on its surface. A connecting rod 20 is inserted into the surface of the C-shaped rod 7. The connecting rod 20 can extend and retract on the surface of the C-shaped rod 7. A spring is installed inside the C-shaped rod 7, connecting the interior of the C-shaped rod 7 to the end of the connecting rod 20. A movable frame 19 is fixed to the other end of the connecting rod 20. The movable frame 19 moves with the connecting rod 20. A second pull ring 17 is fixed to the surface of the movable frame 19. An arc-shaped plate 18 is fixed to the surface of the movable frame 19, moving with the movable frame 19. A rack is provided on the surface of the arc-shaped plate 18. The spring at the end of the connecting rod 20 exerts a pulling force on the connecting rod 20, causing the connecting rod 20 to be inserted into the interior of the U-shaped rod 7. The moving frame 19 and the arc plate 18 move with the connecting rod 20. The arc plate 18 can be inserted into the slot 21. The toothed surface of the arc plate 18 can be locked in the slot 15 on the surface of the screw 16. The surface of the swing frame 3 is held against the surface of the limiting plate 6. Pulling the moving frame 19, the arc plate 18 is no longer held against the slot 21, and the teeth on the surface of the arc plate 18 are no longer locked in the slot 15. Tightening the screw 16, the screw 16 is screwed into the extension plate on the surface of the side plate 4.

[0034] The swing frame 3 swings around the rotating shaft 10. The elastic plate 9 exerts a pulling force on the swing frame 3 and the base 2, causing the two sets of swing frames 3 to hold each other together. The two sets of swing frames 3 and the base 2 can provide protection and enclose the fiber laser 1. When the fiber laser 1 is in use, the swing frame 3 swings around the rotating shaft 10, and the surface of the swing frame 3 presses against the surface of the limiting plate 6. Pulling the moving frame 19, the arc plate 18 is no longer pressed against the slot 21, and the teeth on the surface of the arc plate 18 are no longer stuck in the slot 15. Tightening the screw 16, the screw 16 is screwed into the extension plate on the surface of the side plate 4. The screw 16 drives the C-shaped rod 7 to move, and the C-shaped rod 7 drives the lifting plate 8 to move down in the moving slot 29. The bottom of the lifting plate 8 The telescopic plate 27 moves down in the through hole 28 and extends out of the through hole 28, supporting the bottom of the fiber laser 1. The position of the telescopic plate 27 is adjusted by the screw 16, and the top plate 14 at the bottom of the screw 16 descends with the screw 16. The two ends of the top plate 14 press against the ends of the horizontal plate 12, causing the horizontal plate 12 to move. The horizontal plate 12 moves in the limiting frame 11, and the other end of the horizontal plate 12 moves into the insertion slot 24, stabilizing the angle of the swing frame 3. The swing frame 3 and the base 2 function as a base, and the height of the fiber laser 1 is adjusted by the telescopic plate 27. The first magnet 23 and the second magnet 25 repel each other. After the top plate 14 rises, the end of the horizontal plate 12 moves away from the second magnet 25.

[0035] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A VBG-locked wavelength high-power 976nm multimode fiber laser, characterized in that: include: A fiber laser (1) is provided with a base (2) at its bottom. A swing frame (3) is provided at the end of the base (2). The top of the swing frame (3) is fixed to a side plate (4). A moving groove (29) is provided inside the swing frame (3). A lifting plate (8) is inserted into the moving groove (29). A telescopic plate (27) is fixed at the bottom of the lifting plate (8). A through hole (28) is provided at the bottom of the moving groove (29). A U-shaped rod (7) is fixed on the surface of the lifting plate (8). A screw (16) is provided on the surface of the U-shaped rod (7). A slot (15) is provided on the surface of the screw (16). A moving frame (19) is provided on the surface of the U-shaped rod (7). An arc plate (18) is provided on the surface of the moving frame (19). A limit plate (6) is fixed at the bottom of the base (2). A shaft groove (5) is provided at the end of the base (2). A rotating shaft (10) is provided inside the shaft groove (5). The surface of the rotating shaft (10) is fixed to the end of the swing frame (3). The surface of the swing frame (3) is provided with an elastic plate (9). One end of the elastic plate (9) is connected to the surface of the base (2). The elastic plate (9) is elastic. The surface of the swing frame (3) is fixed with a limit frame (11). A horizontal plate (12) is inserted into the inside of the limit frame (11). The horizontal plate (12) can move inside the limit frame (11). The surface of the side plate (4) is fixed with a first pull ring (13). The horizontal plate (12) is inserted into the inside of the side plate (4). The horizontal plate (12) can move inside the side plate (4). The surface of the C-shaped rod (7) is fixed with an extension rod (30). A screw (16) is screwed into the extension rod (30). Multiple sets of slots (15) are opened on the surface of the screw (16). A limit ring (22) is fixed on the surface of the screw (16). The limit ring (22) is located at the top and bottom of the extension rod (30).

2. A VBG-locked wavelength high-power 976nm multimode fiber laser according to claim 1, characterized in that: The surface of the extension rod (30) is provided with a slot (21), and the surface of the C-shaped rod (7) is provided with a connecting rod (20). The connecting rod (20) can move telescopically on the surface of the C-shaped rod (7). A spring is provided inside the C-shaped rod (7). The spring connects the inside of the C-shaped rod (7) and the end of the connecting rod (20). The other end of the connecting rod (20) is fixed with a moving frame (19). The moving frame (19) moves with the connecting rod (20). A second pull ring (17) is fixed on the surface of the moving frame (19). An arc plate (18) is fixed on the surface of the moving frame (19). The arc plate (18) moves with the moving frame (19). A rack is provided on the surface of the arc plate (18).

3. A VBG-locked wavelength high-power 976nm multimode fiber laser according to claim 2, characterized in that: The end of the horizontal plate (12) is fixed with a first magnet (23), and the end surface of the base (2) is provided with a plug groove (24). The first magnet (23) moves with the horizontal plate (12) and can move into the plug groove (24). A second magnet (25) is fixed in the plug groove (24). The second magnet (25) and the first magnet (23) are of the same polarity and repel each other.

4. A VBG-locked wavelength high-power 976nm multimode fiber laser according to claim 3, characterized in that: The bottom of the screw (16) is inserted into the inside of the top plate (14). A limiting ring is provided at the bottom of the screw (16). An annular groove is provided inside the top plate (14). The limiting ring at the bottom of the screw (16) is located in the annular groove, so that the end of the screw (16) can rotate inside the top plate (14), and the top plate (14) moves up and down with the screw (16).

5. A VBG-locked wavelength high-power 976nm multimode fiber laser according to claim 4, characterized in that: After the top plate (14) descends, it presses against the surface of the horizontal plate (12). The two ends of the top plate (14) are arc-shaped. After the end of the top plate (14) presses against the end of the horizontal plate (12), the horizontal plate (12) moves.

6. A VBG-locked wavelength high-power 976nm multimode fiber laser according to claim 5, characterized in that: A spring (26) is provided in the moving groove (29). There are two sets of springs (26). One end of the spring (26) is connected to the end of the lifting plate (8), and the other end is connected to the inner wall of the moving groove (29). The spring (26) exerts a force on the lifting plate (8), causing the lifting plate (8) to extend out of the moving groove (29).

7. A VBG-locked wavelength high-power 976nm multimode fiber laser according to claim 6, characterized in that: The elastic plate (9) pulls the swing frame (3) so that the swing frame (3) swings around the pivot (10) so that the two sets of swing frames (3) move closer to each other and the swing frame (3), side plate (4) and base (2) wrap around the fiber laser (1).

8. A VBG-locked wavelength high-power 976nm multimode fiber laser according to claim 7, characterized in that: The spring at the end of the plug rod (20) exerts a pulling force on the plug rod (20), so that the plug rod (20) is inserted into the interior of the U-shaped rod (7). The moving frame (19) and the arc plate (18) move with the plug rod (20). The arc plate (18) can be inserted into the slot (21). The toothed surface of the arc plate (18) can be locked in the slot (15) on the surface of the screw (16).

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