A fiber optic mounting structure for a semiconductor laser

Abstract

This application relates to an optical fiber mounting structure for semiconductor lasers, falling within the field of semiconductor laser technology. The structure includes a base plate, a surrounding plate, and an optical fiber. The base plate has bolt holes, through which a bolt is threaded to a base. The base has a through-hole for mounting. A terminal is fixed to the end of the optical fiber, and the terminal is fixed within the mounting hole. A gap exists between the base and the surrounding plate. A flange is fixed to the outside of the surrounding plate by bolt 21, and a sleeve is integrally fixed to the flange. The optical fiber passes through the sleeve. In this application, the optical fiber is directly fixed to the base plate via a copper base, providing a larger heat conduction area, reducing the temperature at the fiber end, and decreasing the probability of near-end fiber burnout. The gap between the base and the surrounding plate, along with the separate design of the base and flange, effectively isolates the optical path deviation caused by surrounding plate deformation, improving the reliability of the laser module. The base and base plate are secured with bolt 1, facilitating repair of modules that fail due to optical fiber defects, improving repair efficiency, and reducing scrap.

Description

Technical Field

[0001] This application relates to the field of semiconductor laser technology, and in particular to an optical fiber mounting structure for a semiconductor laser. Background Technology

[0002] Semiconductor lasers have advantages such as small size, light weight, and high operational reliability, and are widely used in solid-state lasers, CD laser record players, fiber optic communications, optical storage devices, laser printers, and other applications, covering the entire optoelectronic field. A semiconductor laser focuses and concentrates the light emitted from a chip, and then injects it into an optical fiber after being focused by a lens group for output.

[0003] Utility model patent CN218300553U discloses a packaging structure for a fiber-coupled semiconductor laser module. This structure involves stacking multiple light-emitting chips, each emitting laser light towards its respective fast-axis collimating lens. After collimation by the fast-axis collimating lens, the laser light is directed towards a slow-axis collimating lens, which then collimates the laser light into an optical fiber. The laser is then output via the optical fiber. The optical fiber is fixed to a housing, and a cover plate is placed on and welded to the housing.

[0004] In the aforementioned related technologies, the fiber end is fixed to the enclosure (i.e., the tube shell). When the enclosure deforms due to various reasons such as squeezing or impact, the position and orientation of the fiber end change, directly causing optical path output failure, which needs to be improved. Utility Model Content

[0005] This application provides a fiber optic mounting structure for a semiconductor laser, which can prevent the position and orientation of the fiber optic end from shifting when the enclosure deforms, thus ensuring that the product can still function normally.

[0006] This application provides a fiber optic mounting structure for a semiconductor laser, employing the following technical solution:

[0007] A fiber optic mounting structure for a semiconductor laser includes a base plate, a surrounding plate, and an optical fiber. The base plate has bolt holes, and a bolt is inserted into the bolt holes. The bolt is threaded to a base, and the base has a mounting hole. A terminal is fixed to the end of the optical fiber and is fixed in the mounting hole. There is a gap between the base and the surrounding plate. A flange is fixed to the outside of the surrounding plate by a bolt, and a sleeve is integrally fixed to the flange. The optical fiber passes through the sleeve.

[0008] By adopting the above technical solution, a gap is provided between the base and the enclosure, and the base and flange are designed to be separate, which can effectively isolate the optical path deviation caused by the deformation of the enclosure and improve the reliability of the laser module.

[0009] Optionally, the optical fiber is sequentially fitted with an inner sheath and an outer sheath, and the sleeve is fitted over the outer sheath.

[0010] By adopting the above technical solution, the protection effect of optical fiber is improved by using two layers of sheath.

[0011] Optionally, the outer sheath and the sleeve are both fitted with an elastic sleeve.

[0012] By adopting the above technical solution, the outer sheath and the sleeve are connected and fixed by an elastic sleeve to prevent loosening.

[0013] Optionally, the top surface of the base plate is provided with a positioning groove for mounting the base, and the width of the positioning groove matches the width of the base.

[0014] By adopting the above technical solution, the positioning groove facilitates the positioning and installation of the base.

[0015] Optionally, the length of the positioning groove is greater than the length of the base, the base is slidably connected to the positioning groove, and the bolt hole is an oblong hole.

[0016] By adopting the above technical solution, the ends of the optical fibers inside the enclosure may be of different lengths. With the sliding and adjustable base, the ends of the optical fibers can be completely straightened before the base is locked with bolts, avoiding the trouble of rework and adjusting the length and position of the optical fibers.

[0017] Optionally, the base has a fixing hole on its side wall, and the fixing hole communicates with the mounting hole.

[0018] By adopting the above technical solution, the fixing holes are used for injecting glue or installing bolts, thereby fixing the optical fiber and terminals inside the base.

[0019] Optionally, two fixing holes are provided on the same side wall of the base, and the fixing holes are glue injection holes.

[0020] By adopting the above technical solution, the design of dual injection holes improves the effective filling of the gap between the base and the optical fiber or terminal, thereby enhancing the firmness and reliability of the optical fiber.

[0021] Optionally, the fixing hole is a threaded hole, and a bolt three is threadedly connected to the fixing hole. The end of the bolt three is tapered, and an annular groove is provided on the circumferential sidewall of the terminal. The annular groove is a flared groove, and the shape of the annular groove is adapted to the tapered end of the bolt three.

[0022] By adopting the above technical solution, even if the terminal is not accurately positioned within the base during assembly, its position can be corrected by the sliding contact between the tapered end of bolt three and the wall of the annular groove. Bolt three locks the terminal's position within the base; this fixing method eliminates the need for adhesive and makes it more convenient to separate the terminal from the base.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The optical fiber is directly fixed to the base plate through a copper base, which has a larger heat conduction area, reduces the temperature at the end of the optical fiber, and reduces the probability of near-end burning of the optical fiber.

[0025] 2. A gap is provided between the base and the enclosure, and the base and flange are designed to be separate, which can effectively isolate the optical path deviation caused by the deformation of the enclosure and improve the reliability of the laser module.

[0026] 3. The base and bottom plate are secured with bolts, which facilitates the repair of modules that fail due to fiber optic failure, improves repair efficiency, and reduces scrap. Attached Figure Description

[0027] Figure 1 This is a top view of the fiber optic mounting structure of a semiconductor laser according to Embodiment 1;

[0028] Figure 2 This is a localized explosion in Example 1. Figure 1 ;

[0029] Figure 3 This is a localized explosion in Example 1. Figure 2 ;

[0030] Figure 4 This is an exploded view of the base of Embodiment 2;

[0031] Figure 5 This is a top sectional view of the base of Embodiment 2.

[0032] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Enclosure plate; 3. Optical fiber; 11. Bolt hole; 12. Bolt one; 21. Bolt two; 4. Base; 5. Flange; 51. Sleeve; 61. Inner sheath; 62. Outer sheath; 63. Elastic sleeve; 41. Mounting hole; 31. Terminal; 13. Positioning groove; 42. Fixing hole; 43. Bolt three; 32. Ring groove. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] Example 1:

[0035] Reference Figures 1 to 3 This embodiment discloses an optical fiber mounting structure for a semiconductor laser, including a base plate 1, a surrounding plate 2, and an optical fiber 3. The base plate 1 is also used to mount components such as chips and optical elements. The surrounding plate 2 is fixed to the base plate 1, and the optical fiber 3 is led out from the surrounding plate 2.

[0036] The base plate 1 has bolt holes 11, and bolt 12 is inserted into the bolt holes 11. Bolt 12 is threaded to base 4. Base 4 is made of copper and is located on the top surface of base plate 1. Bolt 12 is installed from bottom to top.

[0037] A gap is provided between the base 4 and the surrounding plate 2. A flange 5 is fixed to the outside of the surrounding plate 2 by bolt 21. A sleeve 51 is integrally fixed to the flange 5, and the optical fiber 3 passes through the sleeve 51. An inner sheath 61 and an outer sheath 62 are sequentially sleeved on the outside of the optical fiber 3. The sleeve 51 is sleeved on the outside of the outer sheath 62. An elastic sleeve 63 is sleeved on both the outer sheath 62 and the sleeve 51. The two layers of sheaths improve the protection of the optical fiber 3. The elastic sleeve 63 connects and fixes the outer sheath 62 and the sleeve 51 to prevent loosening. The design of the flange 5 and bolt 21 facilitates disassembly and assembly when maintenance is required.

[0038] The base 4 has a through-hole 41, and a terminal 31 is fixed to the end of the optical fiber 3. The terminal 31 is fixed in the mounting hole 41. The terminal 31 is positioned and installed through the mounting hole 41. The terminal 31 is used to fix the position of the end of the optical fiber 3 and to protect the end of the optical fiber 3.

[0039] The top surface of the base plate 1 has a positioning groove 13 for mounting the base 4. The width of the positioning groove 13 matches the width of the base 4. The length of the positioning groove 13 is greater than the length of the base 4. The base 4 is slidably connected to the positioning groove 13. The bolt hole 11 is an oblong hole, and the oblong length direction of the bolt hole 11 is parallel to the length direction of the positioning groove 13. During assembly, due to inaccurate length matching, the ends of the optical fiber 3 inside the enclosure 2 may be of different lengths. By using the slidably adjustable base 4, the ends of the optical fiber 3 can be completely straightened before the base 4 is locked with bolt 12, avoiding rework and the hassle of adjusting the length of the optical fiber 3. When the base 4 slides within the positioning groove 13, the ends of the optical fiber 3 are always aligned with the end of the optical path, preventing any optical path obstruction.

[0040] The base 4 has a fixing hole 42 on its side wall, which communicates with the mounting hole 41. In this embodiment, there are two fixing holes 42 on the same side wall of the base 4, and the fixing holes 42 are glue injection holes. The design of dual glue injection holes improves the effective filling of glue between the base 4 and the optical fiber 3 or terminal 31, and enhances the firmness and reliability of the optical fiber 3.

[0041] The implementation principle of the fiber optic mounting structure for a semiconductor laser according to an embodiment of this application is as follows: Fiber 3 is directly fixed to the base plate 1 via a copper base 4, providing a larger heat conduction area, reducing the temperature at the end of fiber 3, and decreasing the probability of near-end burnout of fiber 3. A gap is provided between the base 4 and the surrounding plate 2, and the base 4 is designed to be separate from the flange 5, effectively isolating the optical path offset caused by deformation of the surrounding plate 2, thus improving the reliability of the laser module. The base 4 and the base plate 1 are secured with bolts 12, facilitating repair of modules that fail due to fiber 3 failure, improving repair efficiency, and reducing scrap.

[0042] Example 2:

[0043] A fiber optic mounting structure for a semiconductor laser, the difference between Embodiment 2 and Embodiment 1 is as follows:

[0044] Reference Figure 4 and Figure 5 In this embodiment, the fixing hole 42 is a threaded hole, and a bolt 43 is threadedly connected to the fixing hole 42. The end of the bolt 43 is tapered. The circumferential sidewall of the terminal 31 is provided with an annular groove 32, which is a flared groove. The shape of the annular groove 32 is adapted to the tapered end of the bolt 43.

[0045] The implementation principle of Embodiment 2 is as follows: During assembly, even if the position of terminal 31 within the base 4 is inaccurate, the position of terminal 31 can be corrected by the sliding contact between the tapered end of bolt 33 and the wall of the annular groove 32. The position of terminal 31 within the base 4 is locked by bolt 33. This fixing method does not require glue injection and is more convenient when disassembling terminal 31 from the base 4.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fiber mounting structure for a semiconductor laser, comprising a base plate (1), a surrounding plate (2), and an optical fiber (3), characterized in that: The base plate (1) has bolt holes (11) and a bolt (12) passes through the bolt holes (11). The bolt (12) is threaded to a base (4). The base (4) has a through mounting hole (41). The end of the optical fiber (3) is fixed with a terminal (31). The terminal (31) is fixed in the mounting hole (41). There is a gap between the base (4) and the surrounding plate (2). A flange (5) is fixed to the outside of the surrounding plate (2) by a bolt (21). A sleeve (51) is integrally fixed to the flange (5). The optical fiber (3) passes through the sleeve (51).

2. A fiber mounting structure for a semiconductor laser according to claim 1, characterized by: The optical fiber (3) is sequentially fitted with an inner sheath (61) and an outer sheath (62), and the sleeve (51) is fitted over the outer sheath (62).

3. The fiber optic mounting structure for a semiconductor laser according to claim 2, characterized in that: An elastic sleeve (63) is fitted over both the outer sheath (62) and the sleeve (51).

4. The fiber optic mounting structure for a semiconductor laser according to claim 1, characterized in that: The top surface of the base plate (1) is provided with a positioning groove (13) for mounting the base (4), and the width of the positioning groove (13) matches the width of the base (4).

5. The fiber optic mounting structure for a semiconductor laser according to claim 4, characterized in that: The length of the positioning groove (13) is greater than the length of the base (4), the base (4) is slidably connected to the positioning groove (13), and the bolt hole (11) is an oblong hole.

6. The fiber optic mounting structure for a semiconductor laser according to claim 1, characterized in that: The base (4) has a fixing hole (42) on its side wall, and the fixing hole (42) is connected to the mounting hole (41).

7. The fiber optic mounting structure for a semiconductor laser according to claim 6, characterized in that: Two fixing holes (42) are provided on the same side wall of the base (4), and the fixing holes (42) are glue injection holes.

8. The fiber optic mounting structure for a semiconductor laser according to claim 6, characterized in that: The fixing hole (42) is a threaded hole, and the fixing hole (42) is threadedly connected to a bolt (43). The end of the bolt (43) is tapered. The circumferential sidewall of the terminal (31) is provided with an annular groove (32). The annular groove (32) is a flared groove, and the shape of the annular groove (32) is adapted to the tapered end of the bolt (43).

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