A semiconductor fiber coupling device

Abstract

The application discloses a kind of semiconductor fiber coupling equipment, it is related to optical fiber coupling technical field, the equipment includes fixed box, one end center position of the fixed box is equipped with connecting pipe, the first fixed block is installed in the inside of connecting pipe near fixed box center position side, the center position of the first fixed block is equipped with the first optical fiber core of docking hole, the inside of the fixed box is equipped with semiconductor laser, the output end of the semiconductor laser is opposite the input end of first optical fiber core, lens coupling mechanism is arranged between the semiconductor laser and connecting pipe.The lens group of the present application is composed of convex lens and concave lens, which changes the wide parallel light into narrow parallel light. After changing by multiple lens groups, the final laser width is the same as the cross-sectional width of the first optical fiber core, so that the laser emitted by the semiconductor laser is parallelly irradiated into the first optical fiber core, improving the efficiency of fiber coupling.

Description

Technical Field

[0001] This invention relates to the field of optical fiber coupling technology, specifically a semiconductor optical fiber coupling device. Background Technology

[0002] There are two main ways for the optical signal emitted by a semiconductor laser to enter an optical fiber: direct coupling and lens coupling. Lens coupling is further divided into single-lens coupling and multi-lens coupling. Lens coupling can achieve higher coupling efficiency than direct coupling. The main advantage of using dual-lens coupling is that it can disperse tolerances, allowing for greater displacement space of components in the optical path.

[0003] Most existing lens couplings focus the laser beam onto the input end of the optical fiber. However, the focused beam has different angles and will be continuously reflected after entering the optical fiber, affecting the transmission of optical signals.

[0004] Meanwhile, the existing direct coupling method makes it difficult to align the two optical fibers, and the end faces of the two optical fibers cannot be tightly attached, which affects the transmission of optical signals and is inconvenient for users.

[0005] To address the aforementioned problems, an improved semiconductor fiber optic coupling device is now designed. Summary of the Invention

[0006] The purpose of this invention is to provide a semiconductor fiber optic coupling device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A semiconductor fiber optic coupling device includes a fixed box, a connecting tube installed at the center of one end of the fixed box, a first fixing block installed inside the connecting tube near the center of the fixed box, a mating hole opened at the center of the first fixing block, a first fiber core installed inside the mating hole, a space reserved at the end of the mating hole away from the fixed box to facilitate direct coupling between the optical fibers, a semiconductor laser installed inside the fixed box, the output end of the semiconductor laser facing the input end of the first fiber core, a lens coupling mechanism provided between the semiconductor laser and the connecting tube for coupling the laser emitted by the semiconductor laser to the input end of the first fiber core, and a coupling connection mechanism provided on the side of the connecting tube away from the fixed box for direct mating coupling between the optical fibers.

[0009] As a further aspect of the present invention: the lens coupling mechanism includes a first fixing tube, which is disposed between the output end of the semiconductor laser and the input end of the first fiber core. The sidewall of the first fixing tube is fixed to the inner wall of the fixing box by a connecting rod. The center position of the first fixing tube is on the same straight line as the central axis of the first fiber core. The interior of the first fixing tube is provided with a plurality of lens groups for converting wide parallel light into narrow parallel light. The lens group includes a convex lens and a concave lens. The convex lens is disposed on the side closer to the semiconductor laser, and the concave lens is disposed on the side farther away from the semiconductor laser.

[0010] As a further embodiment of the present invention: the coupling connection mechanism includes a fixed cylinder, a rotating seat is installed on the side wall of the fixed cylinder, a fixed ring is rotatably connected to the inner wall of the rotating seat, an internal thread is provided on the inner wall of the fixed ring, and an external thread is provided on the side wall of the connecting tube away from the fixed box. Under the action of the thread, the fixed ring fixes the fixed cylinder inside the connecting tube. An optical fiber is provided at the end of the fixed cylinder away from the connecting tube. The end of the optical fiber near the connecting tube passes through the side wall of the fixed cylinder and is located inside the fixed cylinder. The protective sleeve of the end of the optical fiber near the connecting tube is removed to expose the second optical fiber core. A limiting component is provided at the end of the fixed cylinder near the connecting tube for aligning the second optical fiber core into the insertion hole. A clamping component is provided inside the fixed cylinder for tightly fitting the end of the second optical fiber core to the end of the first optical fiber core.

[0011] As a further embodiment of the present invention: friction protrusions for improving the friction of the sidewall of the fixed ring are installed on the sidewall of the fixed ring.

[0012] As a further embodiment of the present invention: the limiting component includes a second fixing tube, which is disposed at one end of the fixing cylinder near the connecting tube. A second fixing block is installed inside the second fixing tube on the side near the connecting tube. A limiting hole is formed at the center of the second fixing block. The second optical fiber core is placed inside the limiting hole. A limiting ring for limiting the second fixing tube is installed at one end of the first fixing block near the fixing cylinder. A telescopic component for protecting the second optical fiber core is provided at one end of the second fixing tube away from the connecting tube.

[0013] As a further embodiment of the present invention: the telescopic assembly includes a second fixed ring, which is installed on the inner wall of the fixed cylinder. A second limiting rod is installed at one end of the second fixed ring near the second fixed tube. The end of the second limiting rod away from the second fixed ring is installed on the inner wall of the fixed cylinder. A second movable ring is installed through the fixed cylinder at the end of the second fixed tube away from the connecting tube. The second movable ring is slidably sleeved on the side wall of the second limiting rod. A second spring is sleeved on the second limiting rod between the second movable ring and the second fixed ring. The two ends of the second spring are respectively installed on the second fixed ring and the second movable ring.

[0014] As a further embodiment of the present invention: the end of the second fixing tube near the connecting tube is configured as a third guide slope, and the corner of the inner wall of the limiting ring near the fixing cylinder is configured as a second guide slope that cooperates with the third guide slope.

[0015] As a further aspect of the present invention: the side of the docking hole near the fixed cylinder is configured as a first guide slope to facilitate the entry of the second optical fiber core into the docking hole.

[0016] As a further embodiment of the present invention: the clamping assembly includes a sleeve and a first fixing ring. The first fixing ring is installed on the inner wall of the fixed cylinder on the side of the second fixing ring away from the connecting pipe. A plurality of first limiting rods are installed between the first fixing ring and the second fixing ring. The sleeve is fixedly sleeved on the side wall of the optical fiber near the second optical fiber core. A first moving ring is installed on the side wall of the sleeve. The first moving ring is slidably sleeved on the side wall of the first limiting rod. A first spring is sleeved on the side wall of the first limiting rod between the first moving ring and the first fixing ring. The two ends of the first spring are respectively installed on the first fixing ring and the first moving ring. The optical fiber is provided with a redundant length inside the fixed cylinder.

[0017] As a further aspect of the present invention, a number of heat dissipation fins are installed on the side wall of the fixing box to facilitate heat dissipation.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention uses a lens group composed of convex and concave lenses to transform wide parallel light into narrow parallel light. After being modified by multiple lens groups, the final laser width is the same as the cross-sectional width of the first fiber core, thereby illuminating the interior of the first fiber core with parallel laser light emitted by the semiconductor laser, reducing light refraction loss and improving the efficiency of fiber coupling.

[0020] The present invention enables the second optical fiber core to be accurately inserted into the docking hole and docked with the first optical fiber core by limiting the fixed cylinder and the connecting tube, and limiting the second fixed tube and the limiting ring, thereby improving the accuracy and efficiency of the direct coupling between the second optical fiber core and the first optical fiber core.

[0021] Meanwhile, the second optical fiber core is protected by a second retractable and movable fixing tube and a second fixing block to prevent damage to the second optical fiber core.

[0022] The present invention uses a first spring to push the second optical fiber core tightly against the first optical fiber core, which can improve the docking effect between the second optical fiber core and the first optical fiber core and improve the efficiency of optical signal transmission. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the lens coupling mechanism in this invention.

[0025] Figure 3 This is a schematic diagram of the through-hole structure in this invention.

[0026] Figure 4 This is a schematic diagram of the coupling connection mechanism in this invention.

[0027] The components are as follows: 1. Fixing box; 2. Connecting tube; 3. Fixing ring; 4. Fixing cylinder; 5. Optical fiber; 6. Semiconductor laser; 7. First fixing tube; 8. Limiting ring; 9. First fixing block; 10. First optical fiber core; 11. Concave lens; 12. Convex lens; 13. Docking hole; 14. First guide slope; 15. Second guide slope; 16. First fixing ring; 17. First spring; 18. First limiting rod; 19. First moving ring; 20. Second fixing ring; 21. Second spring; 22. Second moving ring; 23. Second limiting rod; 24. Second optical fiber core; 25. Limiting hole; 26. Second fixing block; 27. Third guide slope; 28. Second fixing tube; 29. ​​Sleeve; 30. Rotating seat. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on 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 1-4In this embodiment of the invention, a semiconductor fiber optic coupling device includes a fixed box 1. A connecting tube 2 is installed at the center of one end of the fixed box 1. A first fixing block 9 is installed inside the connecting tube 2 on the side near the center of the fixed box 1. A docking hole 13 is opened at the center of the first fixing block 9. A first fiber core 10 is installed inside the docking hole 13. A space is reserved at the end of the docking hole 13 away from the fixed box 1 to facilitate direct coupling between the optical fibers. A semiconductor laser 6 is installed inside the fixed box 1. The output end of the semiconductor laser 6 is directly opposite the input end of the first fiber core 10. A lens coupling mechanism is provided between the semiconductor laser 6 and the connecting tube 2 for coupling the laser emitted by the semiconductor laser 6 with the input end of the first fiber core 10. A coupling connection mechanism is provided on the side of the connecting tube 2 away from the fixed box 1 for direct docking between the optical fibers.

[0030] The lens coupling mechanism includes a first fixing tube 7, which is disposed between the output end of the semiconductor laser 6 and the input end of the first fiber core 10. The sidewall of the first fixing tube 7 is fixed to the inner wall of the fixing box 1 by a connecting rod. The center position of the first fixing tube 7 is on the same straight line as the central axis of the first fiber core 10. The interior of the first fixing tube 7 is provided with several sets of lens groups for converting wide parallel light into narrow parallel light. The lens group includes a convex lens 12 and a concave lens 11. The convex lens 12 is disposed on the side closer to the semiconductor laser 6, and the concave lens 11 is disposed on the side away from the semiconductor laser 6.

[0031] In use, the parallel laser beam emitted by the semiconductor laser 6 strikes the convex lens 12, which refracts the parallel laser beam onto the concave lens 11. The concave lens 11 outputs the refracted laser beam in parallel, and the width of the parallel laser beam output by the concave lens 11 is smaller than the width of the parallel laser beam input by the convex lens 12. After passing through multiple lens groups, the width of the laser beam is reduced until the width of the laser beam is the same as the cross-section of the first fiber core 10, so that the laser directly enters the interior of the first fiber core 10 in parallel, thereby improving the coupling and transmission efficiency of the laser signal.

[0032] The coupling connection mechanism includes a fixed cylinder 4, a rotating seat 30 installed on the side wall of the fixed cylinder 4, a fixed ring 3 rotatably connected to the inner wall of the rotating seat 30, an internal thread on the inner wall of the fixed ring 3, and an external thread on the side wall of the connecting tube 2 away from the fixed box 1. Under the action of the thread, the fixed ring 3 fixes the fixed cylinder 4 inside the connecting tube 2. An optical fiber 5 is provided at the end of the fixed cylinder 4 away from the connecting tube 2. The end of the optical fiber 5 near the connecting tube 2 passes through the side wall of the fixed cylinder 4 and is located inside the fixed cylinder 4. The protective sleeve of the end of the optical fiber 5 near the connecting tube 2 is removed to expose the second optical fiber core 24. A limiting component is provided at the end of the fixed cylinder 4 near the connecting tube 2 to align and insert the second optical fiber core 24 into the docking hole 13. A clamping component is provided inside the fixed cylinder 4 to tightly dock the end of the second optical fiber core 24 with the end of the first optical fiber core 10.

[0033] The limiting component includes a second fixing tube 28, which is disposed at one end of the fixing cylinder 4 near the connecting tube 2. A second fixing block 26 is installed inside the second fixing tube 28 on the side near the connecting tube 2. A limiting hole 25 is formed at the center of the second fixing block 26. The second optical fiber core 24 is placed inside the limiting hole 25. A limiting ring 8 for limiting the second fixing tube 28 is installed at one end of the first fixing block 9 near the fixing cylinder 4. A telescopic component for protecting the second optical fiber core 24 is provided at one end of the second fixing tube 28 away from the connecting tube 2.

[0034] The telescopic assembly includes a second fixed ring 20, which is installed on the inner wall of the fixed cylinder 4. A second limiting rod 23 is installed at one end of the second fixed ring 20 near the second fixed tube 28. The end of the second limiting rod 23 away from the second fixed ring 20 is installed on the inner wall of the fixed cylinder 4. A second movable ring 22 is installed at the end of the second fixed tube 28 away from the connecting tube 2, which passes through the fixed cylinder 4. The second movable ring 22 is slidably sleeved on the side wall of the second limiting rod 23. A second spring 21 is sleeved on the second limiting rod 23 between the second movable ring 22 and the second fixed ring 20. The two ends of the second spring 21 are respectively installed on the second fixed ring 20 and the second movable ring 22.

[0035] The end of the second fixing tube 28 near the connecting tube 2 is configured as a third guide slope 27, the corner of the inner wall of the limiting ring 8 near the fixing cylinder 4 is configured as a second guide slope 15 that cooperates with the third guide slope 27, and the side of the docking hole 13 near the fixing cylinder 4 is configured as a first guide slope 14 to facilitate the entry of the second optical fiber core 24 into the docking hole 13.

[0036] In use, the fixing cylinder 4 is inserted into the connecting tube 2, and the second fixing tube 28 is inserted into the limiting ring 8. Then, the fixing cylinder 4 continues to move towards the fixing box 1, and the second fixing tube 28 moves towards the fixing cylinder 4. The second fixing tube 28 drives the second moving ring 22 to slide along the side wall of the second limiting rod 23 and compress the second spring 21. At the same time, the second fixing tube 28 drives the second fixing block 26 and the limiting through hole 25 to slide along the side wall of the second optical fiber core 24, so that the second optical fiber core 24 extends out of the limiting through hole 25 and inserts into the inside of the docking through hole 13, and couples and docks with the first optical fiber core 10. Then, the fixing ring 3 is fixed on the connecting tube 2 by threads.

[0037] The clamping assembly includes a sleeve 29 and a first fixing ring 16. The first fixing ring 16 is installed on the inner wall of the fixing cylinder 4 on the side of the second fixing ring 20 away from the connecting pipe 2. A plurality of first limiting rods 18 are installed between the first fixing ring 16 and the second fixing ring 20. The sleeve 29 is fixedly sleeved on the side wall of the optical fiber 5 near the second optical fiber core 24. A first moving ring 19 is installed on the side wall of the sleeve 29. The first moving ring 19 is slidably sleeved on the side wall of the first limiting rod 18. A first spring 17 is sleeved on the side wall of the first limiting rod 18 between the first moving ring 19 and the first fixing ring 16. The two ends of the first spring 17 are respectively installed on the first fixing ring 16 and the first moving ring 19. The optical fiber 5 has a redundant length inside the fixing cylinder 4.

[0038] When the second optical fiber core 24 is coupled and docked with the first optical fiber core 10, the fixed cylinder 4 continues to move towards the connecting tube 2. The second optical fiber core 24 pushes the sleeve 29 to move away from the connecting tube 2. The sleeve 29 drives the first moving ring 19 to slide along the side wall of the first limiting rod 18 and compress the first spring 17, so that the second optical fiber core 24 and the first optical fiber core 10 are tightly fitted and coupled.

[0039] Working principle of a semiconductor fiber optic coupling device:

[0040] When connecting the fixing cylinder 4 and the connecting tube 2, the fixing cylinder 4 is inserted into the connecting tube 2, and the second fixing tube 28 is inserted into the limiting ring 8. Then the fixing cylinder 4 continues to move towards the fixing box 1, and the second fixing tube 28 moves towards the fixing cylinder 4. The second fixing tube 28 drives the second moving ring 22 to slide along the side wall of the second limiting rod 23 and compresses the second spring 21. At the same time, the second fixing tube 28 drives the second fixing block 26 and the limiting through hole 25 to slide along the side wall of the second optical fiber core 24, so that the second optical fiber core 24 extends out of the limiting through hole 25 and inserts into the inside of the docking through hole 13, and couples and docks with the first optical fiber core 10.

[0041] Then the fixing cylinder 4 continues to move slightly towards the connecting tube 2, the second optical fiber core 24 pushes the sleeve 29 to move away from the connecting tube 2, the sleeve 29 drives the first moving ring 19 to slide along the side wall of the first limiting rod 18 and compress the first spring 17, so that the second optical fiber core 24 and the first optical fiber core 10 are tightly fitted and coupled, and then the fixing ring 3 is fixed on the connecting tube 2 by threads.

[0042] In use, the parallel laser beam emitted by the semiconductor laser 6 strikes the convex lens 12, which refracts the parallel laser beam onto the concave lens 11. The concave lens 11 outputs the refracted laser beam in parallel, and the width of the parallel laser beam output by the concave lens 11 is smaller than the width of the parallel laser beam input by the convex lens 12. After passing through multiple lens groups, the width of the laser beam is reduced until it is the same as the cross-section of the first fiber core 10, so that the laser directly enters the interior of the first fiber core 10 in parallel. The first fiber core 10 transmits the laser signal to the second fiber core 24, and then transmits it to the outside through the second fiber core 24 inside the fiber 5.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A semiconductor fiber optic coupling device, comprising a fixing box (1), wherein a connecting pipe (2) is installed at the center of one end of the fixing box (1), characterized in that, A first fixing block (9) is installed inside the connecting tube (2) on the side near the center of the fixing box (1). A docking hole (13) is opened at the center of the first fixing block (9). A first optical fiber core (10) is installed inside the docking hole (13). A space is reserved at the end of the docking hole (13) away from the fixing box (1) to facilitate direct coupling between optical fibers. A semiconductor laser (6) is installed inside the fixing box (1). The output end of the semiconductor laser (6) is directly opposite the input end of the first optical fiber core (10). A lens coupling mechanism is provided between the semiconductor laser (6) and the connecting tube (2) to couple the laser emitted by the semiconductor laser (6) with the input end of the first optical fiber core (10). A coupling connection mechanism is provided on the side of the connecting tube (2) away from the fixing box (1) to enable direct docking between optical fibers. The coupling connection mechanism includes a fixed cylinder (4), a rotating seat (30) is installed on the side wall of the fixed cylinder (4), a fixed ring (3) is rotatably connected to the inner wall of the rotating seat (30), an internal thread is provided on the inner wall of the fixed ring (3), and an external thread is provided on the side wall of the connecting tube (2) away from the fixed box (1). Under the action of the thread, the fixed ring (3) fixes the fixed cylinder (4) inside the connecting tube (2). An optical fiber (5) is provided at the end of the fixed cylinder (4) away from the connecting tube (2). One end of the optical fiber (5) near the connecting tube (2) passes through the side wall of the fixing cylinder (4) and is set inside the fixing cylinder (4). The protective sleeve of the end of the optical fiber (5) near the connecting tube (2) is removed to expose the second optical fiber core (24). The end of the fixing cylinder (4) near the connecting tube (2) is provided with a limiting component for aligning the second optical fiber core (24) into the mating hole (13). The inside of the fixing cylinder (4) is provided with a clamping component for tightly mating the end of the second optical fiber core (24) with the end of the first optical fiber core (10). The limiting component includes a second fixing tube (28), which is located at one end of the fixing cylinder (4) near the connecting tube (2). A second fixing block (26) is installed inside the second fixing tube (28) on the side near the connecting tube (2). A limiting hole (25) is opened at the center of the second fixing block (26). The second optical fiber core (24) is placed inside the limiting hole (25). A limiting ring (8) for limiting the second fixing tube (28) is installed at one end of the first fixing block (9) near the fixing cylinder (4). A telescopic component for protecting the second optical fiber core (24) is provided at one end of the second fixing tube (28) away from the connecting tube (2). The telescopic assembly includes a second fixed ring (20), which is installed on the inner wall of the fixed cylinder (4). A second limiting rod (23) is installed at one end of the second fixed ring (20) near the second fixed tube (28). The end of the second limiting rod (23) away from the second fixed ring (20) is installed on the inner wall of the fixed cylinder (4). A second moving ring (22) is installed at one end of the second fixed tube (28) away from the connecting tube (2) through the fixed cylinder (4). The second moving ring (22) is slidably sleeved on the side wall of the second limiting rod (23). A second spring (21) is sleeved on the second limiting rod (23) between the second moving ring (22) and the second fixed ring (20). The two ends of the second spring (21) are respectively installed on the second fixed ring (20) and the second moving ring (22).

2. The semiconductor fiber optic coupling device according to claim 1, characterized in that, The lens coupling mechanism includes a first fixing tube (7), which is disposed between the output end of the semiconductor laser (6) and the input end of the first fiber core (10). The side wall of the first fixing tube (7) is fixed to the inner wall of the fixing box (1) by a connecting rod. The center position of the first fixing tube (7) is on the same straight line as the central axis of the first fiber core (10). The interior of the first fixing tube (7) is provided with several sets of lens groups for converting wide parallel light into narrow parallel light. The lens group includes a convex lens (12) and a concave lens (11). The convex lens (12) is disposed on the side closer to the semiconductor laser (6), and the concave lens (11) is disposed on the side away from the semiconductor laser (6).

3. The semiconductor fiber optic coupling device according to claim 1, characterized in that, The side wall of the fixed ring (3) is equipped with friction protrusions to improve the friction of the side wall of the fixed ring (3).

4. A semiconductor fiber optic coupling device according to claim 1, characterized in that, The end of the second fixed tube (28) near the connecting tube (2) is set as a third guide slope (27), and the corner of the inner wall of the limiting ring (8) near the fixed cylinder (4) is set as a second guide slope (15) that cooperates with the third guide slope (27).

5. A semiconductor fiber optic coupling device according to claim 1, characterized in that, The side of the docking hole (13) near the fixed cylinder (4) is configured as a first guide slope (14) to facilitate the entry of the second optical fiber core (24) into the docking hole (13).

6. A semiconductor fiber optic coupling device according to claim 1, characterized in that, The clamping assembly includes a sleeve (29) and a first fixing ring (16). The first fixing ring (16) is installed on the inner wall of the fixing cylinder (4) on the side of the second fixing ring (20) away from the connecting pipe (2). A plurality of first limiting rods (18) are installed between the first fixing ring (16) and the second fixing ring (20). The sleeve (29) is fixedly sleeved on the side wall of the optical fiber (5) near the second optical fiber core (24). A first moving ring (19) is installed on the side wall of the sleeve (29). The first moving ring (19) is slidably sleeved on the side wall of the first limiting rod (18). A first spring (17) is sleeved on the side wall of the first limiting rod (18) between the first moving ring (19) and the first fixing ring (16). The two ends of the first spring (17) are respectively installed on the first fixing ring (16) and the first moving ring (19). The optical fiber (5) is provided with redundant length inside the fixing cylinder (4).

7. A semiconductor fiber optic coupling device according to claim 1, characterized in that, The side wall of the fixed box (1) is equipped with several heat dissipation fins to facilitate heat dissipation.

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