Optical fiber coupling device

Abstract

The application discloses an optical fiber coupling device. The optical fiber coupling device comprises an optical assembly, a first block, an optoelectronic conversion accommodation space arranged on the front end bottom of the first block, a plurality of optical fiber counterbores arranged on the rear end of the first block and extending to the front end thereof, and a reflecting surface arranged on the first block and used for implementing light propagation between the optical fiber counterbores and the optoelectronic conversion accommodation space; a crosser comprising a second block and a plurality of optical fiber through holes arranged on the second block and penetrating the second block in the front-rear direction. When the front end of the crosser is butted against the rear end of the optical assembly, each optical fiber through hole is opposite to a corresponding optical fiber counterbore. The optical fiber coupling device has lower requirements on machining precision and assembly precision, is easy to reduce manufacturing cost, has smaller overall size and is easy to meet the development demand of miniaturization and high-density integration of an optical module.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of optical fiber communication. More specifically, this utility model relates to an optical fiber coupling device. Background Technology

[0002] Optical fiber communication technology plays a central role in modern communications. In optical modules, fiber optic couplers are used to couple the optical fiber to the photoelectric conversion module, and are key components for achieving efficient optical signal transmission between the optical fiber and the photoelectric conversion module.

[0003] Represented by the active fiber optic coupling device disclosed in Chinese invention patent document CN104808298B (hereinafter referred to as the document), existing fiber optic coupling devices mainly consist of an optical component (equivalent to the optocoupler in the document) and a jumper (equivalent to the fiber optic connector in the document). The jumper has multiple fiber optic through holes, which can independently fix multiple optical fibers. The end of each optical fiber extends from the outside of the jumper. The optical component has a fiber optic countersunk hole for receiving multiple optical fibers. When the jumper is connected to the optical component, the multiple fiber optic through holes must be precisely aligned with the single fiber optic countersunk hole so that the part of the optical fiber that passes through the jumper can be smoothly inserted into the fiber optic countersunk hole.

[0004] However, because the quality of optical signal transmission is extremely sensitive to the height difference between the through-hole and the countersunk hole in the optical fiber, this requirement increases the processing and assembly precision of optical fiber coupling devices, leading to increased manufacturing costs. Furthermore, the overall size of existing optical fiber coupling devices, especially the dimensions along the fiber's extension direction, is too large, making it difficult to meet the miniaturization and integration needs of optical modules and cables. Utility Model Content

[0005] To address one or more of the technical problems mentioned above, this utility model provides an optical fiber coupling device, which has lower requirements for processing and assembly precision, is easier to reduce manufacturing costs, and has a smaller overall size, making it easier to meet the development needs of miniaturization and high-density integration of optical modules / cables.

[0006] According to this utility model, an optical fiber coupling device is provided, comprising: an optical component including a first block, a photoelectric conversion accommodating space disposed at the bottom front end of the first block, a plurality of optical fiber recesses disposed at the rear end of the first block and extending towards its front end, and a reflective surface disposed on the first block for enabling light propagation between the optical fiber recesses and the photoelectric conversion accommodating space; and a jumper including a second block and a plurality of optical fiber through-holes disposed on the second block and penetrating the second block in a front-rear direction. When the front end of the jumper is connected to the rear end of the optical component, each of the optical fiber through-holes is respectively opposite to the corresponding optical fiber recess.

[0007] With the fiber optic coupling device described above, multiple fiber optic slots are provided at the rear end of the optical component. When the jumper is connected to the optical component, the multiple fiber optic through-holes on the jumper are aligned with the corresponding fiber optic slots on the optical component. This one-to-one correspondence allows each fiber optic slot to independently guide and correct the fiber extending from its corresponding through-hole. Therefore, even if there is a certain height difference or alignment deviation between the corresponding fiber optic slots and through-holes due to processing or assembly accumulation when the jumper is connected to the optical component, each fiber optic slot can still effectively guide the fiber into the correct position of the optical component. This significantly reduces the requirements for the processing accuracy of the jumper and the optical component itself, as well as the assembly accuracy between them, thereby simplifying the process and reducing manufacturing costs.

[0008] Furthermore, since the multiple fiber optic countersinks in the optical components have the function of guiding and correcting the optical fibers, the fiber optic through-holes in the jumper do not need to be designed to be too long to ensure the collimation of the optical fibers. The shortening of the fiber optic through-hole length allows the overall length (the front-to-back dimension) of the jumper itself to be reduced accordingly, thereby enabling the reduction of the size of the entire optical fiber coupling device, making it easier to meet the development needs of miniaturization and high-density integration of optical modules. Attached Figure Description

[0009] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0010] Figure 1 This is a schematic diagram of the optical fiber structure;

[0011] Figure 2 This is a perspective view of the fiber optic coupling device in the assembled state according to an embodiment of the present invention;

[0012] Figure 3 This is a perspective view of the fiber optic coupling device in an exploded state according to an embodiment of the present invention.

[0013] Figure 4 This is a perspective view of the optical component of the fiber optic coupling device according to an embodiment of the present invention;

[0014] Figure 5 for Figure 4 Sectional view of line AA in the middle;

[0015] Figure 6 This is a cross-sectional view of the jumper of the fiber optic coupling device according to an embodiment of the present invention;

[0016] Figure 7 This is a perspective view of the jumper of the fiber optic coupling device according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 10. Fiber optic coupling device; 1. Optical component; 11. First block; 11a. Visual positioning structure; 12. Photoelectric conversion accommodating space; 12a. Lens structure; 13. Fiber optic countersunk hole; 131. Second guide section; 132. Second positioning section; 133. Clearance section; 14. Reflective surface; 15. First mating surface; 16. Positioning post; 17. Adhesive groove; 18. Boss; 19. Adhesive-blocking protrusion; 2. Jumper; 21. Second block; 21a. Visual positioning structure; 22. Fiber optic cable 221. Hole; 222. First guide section; 222. First positioning section; 231. Adhesive groove; 232. Guide groove; 233. Locking groove; 241. Left clamping groove; 242. Right clamping groove; 251. Left clearance notch; 252. Right clearance notch; 261. Left adhesive control notch; 262. Right adhesive control notch; 27. Second mating surface; 28. Positioning hole; 29. ​​Recess; 200. Optical fiber; 2001. Bare fiber; 2001a. Fiber core; 2001b. Cladding; 2002. Coloring layer. Detailed Implementation

[0018] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0019] For ease of understanding, please refer to Figure 2 and Figure 3 As shown, this application defines the direction of the jumper toward the optical component as "front" and the opposite direction as "back"; when an observer faces the "back" of the fiber optic coupler, the direction on the left side of the observer is "left" and the direction on the right side of the observer is "right"; when the fiber optic coupler is installed in the circuit board, the direction parallel to and close to the circuit board is "down" and the opposite direction is "up". "Top" refers to the part of the object being described facing upwards, while "bottom" refers to the part of the object being described facing downwards.

[0020] Figure 1 The specific structure of the optical fiber is shown. Figure 2 and Figure 3 The fiber optic coupling devices of embodiments of this utility model are shown in all examples. Figure 1 , Figure 2 and Figure 3As shown, an embodiment of this utility model provides an optical fiber coupling device 10. This optical fiber coupling device 10 is a component of an optical module and is used to couple an optical fiber 200 to the photoelectric conversion module of the optical module [e.g., a vertical-cavity surface-emitting laser (VCSEL) and / or a photodiode (PD)] to achieve efficient transmission of optical signals between the optical fiber 200 and the photoelectric conversion module. The optical fiber coupling device 10 includes an optical component 1. The optical component 1 includes a first block 11 made of a light-transmitting material (such as resin), a photoelectric conversion accommodating space 12 disposed at the bottom front end of the first block 11, a plurality of optical fiber countersinks 13 disposed at the rear end of the first block 11 and extending towards its front end, and a reflective surface 14 disposed on the first block 11 for implementing light propagation between the optical fiber countersinks 13 and the photoelectric conversion accommodating space 12. The photoelectric conversion accommodating space 12 is used to accommodate the photoelectric conversion module, and the optical fiber countersink 13 is used to receive the bare fiber 2001 of the optical fiber 200, so that when the optical signal is transmitted from the optical fiber 200 to the photoelectric conversion module or from the photoelectric conversion module to the optical fiber 200, it passes through the optical component 1. Thus, the optical component 1 has the function of transmitting optical signals and changing the propagation direction, and it also helps to reduce the size of the optical module, especially the height (i.e., the vertical dimension).

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, the fiber optic coupling device 10 also includes a jumper 2 for receiving and securing the optical fiber 200 and inserting and securing it within the fiber optic coupling device 10. The jumper 2 includes a second block 21 made of a light-transmitting material (such as optical glass, resin, etc.) or an opaque material (such as liquid crystal polymer, polyphenylene sulfide, etc.), and a plurality of fiber optic vias 22 disposed on the second block 21 and penetrating the second block 21 in the front-back direction. The fiber optic vias 22 are used to receive the optical fiber 200 and allow the bare fiber 2001 of the optical fiber 200 to pass through them. The optical fiber 200 can be secured to the second block 21 and / or the fiber optic vias 22 by adhesives or other known fastening methods. When the front end of the jumper 2 is mated with the rear end of the optical component 1, each fiber optic via 22 is aligned with a corresponding fiber optic countersink 13, thereby allowing the portion of the optical fiber 200 exiting the fiber optic via 22 of the optical component 1 to enter the fiber optic countersink 13.

[0022] As an example, multiple fiber optic countersunk holes 13 are at the same height and are spaced equally in the left-right direction within the first block 11, and multiple fiber optic through holes 22 are at the same height and are spaced equally in the left-right direction within the second block 21. At the same time, the fiber optic countersunk holes 13 and fiber optic through holes 22 are at the same height relative to the same reference plane (such as the upper surface of the circuit board of the optical module). Thus, when the front end of the jumper 2 is connected to the rear end of the optical component 1, the multiple fiber optic through holes 22 and the multiple fiber optic countersunk holes 13 can be connected one by one, and the part of the bare fiber 2001 of each fiber 200 extending out of the fiber optic through hole 22 can enter the corresponding fiber optic countersunk hole 13.

[0023] Therefore, it can be seen that multiple fiber optic countersunk holes 13 are provided at the rear end of the optical component 1. When the jumper 2 is connected to the optical component 1, the multiple fiber optic through holes 22 on the jumper 2 are respectively aligned with the corresponding fiber optic countersunk holes 13 on the optical component 1. This one-to-one correspondence allows each fiber optic countersunk hole 13 to independently guide and correct the fiber 200 extending from its corresponding fiber optic through hole 22. Therefore, even if there is a certain height difference or alignment deviation between the corresponding fiber optic countersunk holes 13 and fiber optic through holes 22 due to processing or assembly accumulation when the jumper 2 is connected to the optical component 1, each fiber optic countersunk hole 13 can still effectively guide the fiber 200 into the correct position of the optical component 1, significantly reducing the requirements for the processing accuracy of the jumper 2 and the optical component 1 themselves, as well as the assembly accuracy between them, thereby simplifying the process and reducing manufacturing costs. Furthermore, since the multiple fiber optic countersinks 13 in the optical component 1 have the function of guiding and correcting the fiber optic 200, the fiber optic through-holes 22 in the jumper 2 do not need to be designed to be too long to ensure the collimation of the fiber optic 200 when it passes through the jumper 2. The shortening of the length of the fiber optic through-holes 22 allows the overall length (the front-to-back dimension) of the jumper 2 to be reduced accordingly, thereby reducing the size of the entire fiber optic coupling device 10 and making it easier to meet the development needs of miniaturization and high-density integration of optical modules.

[0024] In this embodiment, as Figure 3 and Figure 6 As shown, the fiber optic via 22, from back to front, sequentially includes a first guide section 221 with a guide cone surface for guiding the insertion of the bare fiber 2001 of the optical fiber 200, and a first positioning section 222 for the bare fiber 2001 of the optical fiber 200 to pass through and for positioning the bare fiber 2001 of the optical fiber 200. The first guide section 221 should at least include a conical section. The minimum diameter of the first guide section 221 (i.e., the small diameter portion of the conical section) is larger than the diameter of the bare fiber 2001, and the maximum diameter of the first guide section 221 (i.e., the large diameter portion of the conical section) is larger than the minimum diameter of the first guide section 221 but smaller than the outer diameter of the colored layer 2002 of the optical fiber 200. Therefore, the first guide section 221 can guide the bare fiber 2001 of the optical fiber 200 into the first positioning section 222 more smoothly and safely.

[0025] As an example, the first guide segment 221 includes a cylindrical segment and a conical segment sequentially in a back-to-forward direction, wherein the large-diameter end of the conical segment is connected to the cylindrical segment, and the small-diameter end of the conical segment is connected to the first positioning segment 222. The first guide segment 221 with the cylindrical segment is easier to manufacture, thereby helping to reduce the production cost of the fiber optic coupling device 10.

[0026] As an example, the first positioning segment 222 is cylindrical, and the minimum diameter of the first guide segment 221 is the same as the diameter of the first positioning segment 222. The maximum diameter of the first positioning segment 222 is 0.01 mm larger than the diameter of the bare fiber 2001 of the optical fiber 200. This precise interference fit ensures that the bare fiber 2001 of the optical fiber 200 can easily pass through the fiber optic through-hole 22, and also creates an annular space for the adhesive to flow around the bare fiber 2001, ensuring that the adhesive is evenly distributed within the first positioning segment 222 and firmly bonds the bare fiber 2001 within it. Furthermore, the difference between the diameter of the first positioning segment 222 and the diameter of the bare fiber 2001 is not too large, so that the first positioning segment 222 aligns with the bare fiber 2001, effectively aligning it with the corresponding fiber optic countersink 13 after it passes through the first positioning segment 222.

[0027] In a preferred embodiment, the diameter of the first positioning segment 222 is 0.129 mm, the size of the bare fiber is 125 μm, the diameter of the inner arc of the guide groove 232 is 200 μm, and the size is slightly smaller than the diameter of the coloring layer. Multiple bare fibers are arranged side by side in the guide groove 232. After the bare fiber 2001 passes through the first positioning segment 222, the adhesive flows from the guide groove 232 along the bare fiber 2001 into the first positioning segment 222 until the adhesive is observed to overflow from the front end of the jumper 2. The injection of adhesive is then stopped, so that the adhesive fully wraps the bare fiber 2001, thereby ensuring the stability of the bare fiber fixed in the jumper 2.

[0028] More preferably, the length of the first positioning segment 222 is 3 to 5 times the diameter of the bare fiber 2001. If the first positioning segment 222 is too long, the length (front-to-back dimension) of the jumper 2 will be excessively long, which is detrimental to the miniaturization and integration of the fiber optic coupling device 10. Conversely, if the first positioning segment 222 is too short, the bare fiber 2001 will easily pass through the fiber optic through-hole 22 eccentrically. Therefore, after extensive experimental verification, it was found that when the length of the first positioning segment 222 is 3 to 5 times the diameter of the bare fiber 2001, this not only ensures that the bare fiber 2001 passes through the fiber optic through-hole 22 approximately concentrically, but also makes it easier to shorten the length of the jumper 2. It should be understood that the length of the first positioning segment 222 matches its diameter, thereby achieving the shortest possible length for fixing the bare fiber 2001 within the jumper 2.

[0029] like Figure 3 and Figure 5 As shown, the fiber optic countersink 13, from back to front, sequentially includes a second guide section 131, which guides the insertion of the bare fiber 2001 of the optical fiber 200 and also has a guide cone surface, and a second positioning section 132, which receives and positions the bare fiber 2001 of the optical fiber 200. The second guide sections 131 of adjacent fiber optic countersinks 13 are spaced apart from each other in the left-right direction, or are adjacent to each other or intersect. The maximum diameter of the second guide section 131 (i.e., the large diameter portion of the guide cone surface) is greater than the diameter of the first positioning section 222 but smaller than the outer diameter of the colored layer 2002 of the optical fiber 200, and the minimum diameter of the second guide section 131 is greater than the diameter of the bare fiber 2001. Therefore, the second guide section 131 can more accurately receive the bare fiber 2001 of the optical fiber 200 extending from the jumper 2 and guide it to the second positioning section 132. The maximum diameter of the second guide section 131 (i.e., the large diameter portion of the guide cone surface) ensures that when the optical assembly 1 has multiple fiber countersinks 13, the multiple bare fibers located within the jumper 2 are closely arranged without inter-fiber inserts, thus reducing the width (left-right dimension) of the optical assembly 1 and achieving miniaturization of the fiber coupling device 10. Simultaneously, the minimum diameter of the second guide section 131 is the same as the diameter of the second positioning section 132, and the maximum diameter of the second positioning section 132 is 0.01 mm larger than the diameter of the bare fiber 2001. This precise interference fit is primarily used to ensure that the bare fiber 2001 of the optical fiber 200 can easily pass through the fiber countersink 13 and align with the predetermined optical path position.

[0030] Preferably, the optical fiber countersink 13 further includes a clearance section 133 located in front of and connected to the second positioning section 132. The diameter of the clearance section 133 is larger than the core 2001a of the bare fiber 2001 but smaller than the cladding 2001b of the bare fiber 2001. The clearance section 133 can prevent the core 2001a of the bare fiber 2001 from colliding with the bottom of the optical fiber countersink 13 after the bare fiber 2001 is fully inserted into the optical fiber countersink 13, thus effectively protecting the core 2001a of the bare fiber 2001. It is understood that the core 2001a of the optical fiber 200 is made of brittle quartz, while the cladding is made of low-refractive-index pure quartz or fluoropolymer. This avoids contact between the core 2001a and the optical component 1, thereby ensuring the integrity of the core 2001a structure and contributing to signal transmission stability.

[0031] like Figure 3 and Figure 6To secure the optical fiber 200 to the jumper 2, the jumper 2 may further include an adhesive-containing groove 231 located at the top rear end of the second block 21, and multiple guide grooves 232 located on the bottom of the adhesive-containing groove 231 and matched with each optical fiber through-hole 22. The guide grooves 232 guide the bare fiber 2001 of the optical fiber 200 into its corresponding optical fiber through-hole 22 and accommodate the bare fiber 2001. The guide grooves 232 facilitate guiding the bare fiber 2001 of the optical fiber 200 into its corresponding optical fiber through-hole 22 during assembly, making the operation easier and more efficient, especially for multiple optical fibers 200. Simultaneously, the adhesive-containing groove 231, guide grooves 232, and optical fiber through-hole 22 can be used to contain adhesive, allowing the adhesive to bond and fix the optical fiber 200 in the jumper 2 after curing.

[0032] In this embodiment, the jumper 2 further includes a locking groove 233 disposed within the bottom of the adhesive reservoir 231 and extending forward from the rear end of the second block 21. The locking groove 233 is used to accommodate the coloring layer 2002 of the optical fiber 200, so that the end face of the coloring layer 2002 can abut against the wall of the locking groove 233 near the optical component 1. By providing a clear stopping point for the coloring layer 2002, the length of the bare fiber 2001 extending out of the jumper 2 can be controlled, which is beneficial to improving assembly efficiency and quality. In addition, the locking groove 233 is also used to accommodate the adhesive, so that the adhesive can firmly fix the optical fiber 200, especially the coloring layer 2002, to the jumper 2 after curing.

[0033] In this embodiment, the jumper 2 may further include a left clamping groove 241 and a right clamping groove 242 respectively disposed on the left and right sides of the second block 21 and symmetrical about the adhesive groove 231, see [link to previous embodiment]. Figure 3 The left clamping slot 241 and the right clamping slot 242 are preferably rectangular, semi-circular, or triangular. The left clamping slot 241 and the right clamping slot 242 facilitate automated assembly equipment (e.g., fixtures, robotic arms) to safely clamp, orient, and manipulate the jumper 2 during manufacturing and assembly processes (e.g., docking with the optical component 1).

[0034] In this embodiment, the jumper 2 may further include a left clearance notch 251 and a right clearance notch 252 respectively disposed at the bottom left and bottom right sides of the second block 21 and intersecting the left clamping groove 241 and the right clamping groove 242 in sequence. See [reference] Figure 3 and Figure 7 The left clearance notch 251 and the right clearance notch 252 provide dwell space for the gripper mechanism of the automated assembly equipment, making it easier for the jumper 2 to be gripped more safely and reliably by the automated assembly equipment.

[0035] In this embodiment, the jumper 2 further includes a left adhesive control notch 261 and a right adhesive control notch 262 respectively disposed on the top left and right sides of the second block 21 and intersecting the left clamping groove 241 and the right clamping groove 242 in sequence. See [reference] Figure 3 The left-side adhesive control notch 261 and the right-side adhesive control notch 262 can reduce the thickness of the edge of the adhesive container 231, increase the surface tension of the adhesive on the top of the adhesive container 231, and thus reduce the possibility of the adhesive overflowing from the adhesive container 231.

[0036] In this embodiment, the tops of the first block 11 and the second block 21 are respectively provided with multiple visual positioning structures 11a and multiple visual positioning structures 21a, wherein the visual positioning structures 11a and 21a include grooves, protrusions, stickers, or coated markings. The presence of the visual positioning structures 11a and 21a facilitates the machine vision system of the automated assembly equipment to identify the location of the first block 11 and the second block 21, which can effectively improve the efficiency and quality of the fiber optic coupling device 10 in the automated production process.

[0037] In this embodiment, as Figures 3 to 6 As shown, one of the rear end of the first block 11 and the front end of the second block 21 includes a first mating surface 15 and a plurality of positioning posts 16 spaced apart along the left-right direction on the first mating surface 15. The other of the rear end of the first block 11 and the front end of the second block 21 includes a second mating surface 27 that matches and mates with the first mating surface 15, and a plurality of positioning holes 28 formed on the second mating surface 27 and respectively receiving the corresponding positioning posts 16. The engagement of the positioning holes 28 with the positioning posts 16 facilitates highly precise positioning of the optical component 1 and the jumper 2, and easily ensures the correct alignment of the fiber optic countersunk hole 13 and the fiber optic through hole 22, so as to achieve optimal coupling between the optical component 1 and the jumper 2.

[0038] Preferably, there are two positioning holes 28 and two positioning posts 16. Two positioning holes 28 and two positioning posts 16 are generally sufficient to achieve optimal coupling between the optical component 1 and the jumper 2, and are also the smallest and most optimal choice.

[0039] In this embodiment, the first mating surface 15 and the second mating surface 27 can be selected as a plane or a stepped surface, etc. As a preferred example, the first mating surface 15 is formed on the first block 11, and the rear bottom of the first block 11 includes a boss 18 provided on the first mating surface 15 and extending from front to back. The second mating surface 27 is formed on the second block 21, and the front bottom of the second block 21 includes a recess 29 provided on the second mating surface 27 for matching and receiving the boss 18. The optical component 1 also includes a dispensing groove 17 provided on the bottom of the first block 11 and closer to the jumper 2 than the photoelectric conversion accommodating space 12. The dispensing groove 17 is partially formed on the bottom of the boss 18. The cooperation between the boss 18 and the recess 29 helps to further improve the docking accuracy of the optical component 1 and the jumper 2, and at the same time makes the optical component 1 and the jumper 2 overlap in the front-to-back direction. Thus, while ensuring that the dispensing groove 17 has sufficient size to accommodate a sufficient amount of adhesive, the length and height (i.e., the vertical dimension) of the fiber optic coupling device 10 can be further reduced. The dispensing groove 17 is used to hold the adhesive and ensure that it can firmly fix the optical component 1 to the circuit board. Its arrangement, which is partially formed on the boss 18, helps to reduce the length of the optical component 1.

[0040] Preferably, the dispensing groove 17 is configured to hold sufficient adhesive to meet the bonding and fixing requirements of the optical component 1, and the height of the dispensing groove 17 is set such that the adhesive cured within it can be squeezed out. This design improves the curing effect and bonding strength of the adhesive, which is beneficial to improving the stability and reliability of the optical component 1 on the circuit board.

[0041] In a preferred embodiment, the height of the dispensing groove 17 is set slightly below the height of the layer of adhesive squeezed out by the dispensing gun, thereby reducing the height (i.e., the vertical dimension) of the light assembly 1 while allowing the dispensing groove 17 to squeeze out the adhesive cured therein.

[0042] As an example, the end of the positioning post 16 facing the positioning hole 28 and / or the end of the positioning hole 28 facing the positioning post 16 have chamfers, and the positioning post 16 is partially located on the boss 18, while the positioning hole 28 is partially located in the recess 29. The chamfers ensure that the positioning post 16 can be more easily inserted into the positioning hole 28, and the partial arrangement of the positioning post 16 on the boss 18 and the arrangement of the positioning hole 28 in the recess 29 can further improve the smoothness and safety of the insertion of the positioning post 16 into the positioning hole 28.

[0043] In this embodiment, the photoelectric conversion accommodating space 12 is preferably a notch structure, which includes a first opening, a second opening, a third opening, and a fourth opening sequentially located at the bottom, front end, left side, and right side of the first block 11. The multi-directionally open notch structure is suitable for accommodating photoelectric conversion modules with a volume exceeding its own size, thus avoiding the problem of having to design the length and width (left-right dimension) of the optical component 1 to be too large in order to fully accommodate the photoelectric conversion module.

[0044] In this embodiment, the optical component 1 further includes a lens structure 12a disposed in the top region of the notch structure and below the reflective surface 14, and an adhesive-blocking ridge 19 disposed in the top region of the notch structure and further away from the jumper 2 than the lens structure 12a. The lens structure 12a is crucial for focusing light from the optical fiber 200 onto the photoelectric conversion module, or for aiming light from the photoelectric conversion module into the optical fiber 200, effectively improving the transmission quality of the optical signal. The adhesive-blocking ridge 19 prevents adhesive from flowing between the lens structure 12a and the photoelectric conversion module and causing a certain degree of obstruction, thus avoiding a decrease in the optical performance of the optical component 1.

[0045] The following describes the assembly method of the fiber optic coupling device 10 mentioned above. This assembly method can be carried out manually or by automated assembly equipment, and specifically includes: first, stripping the dyed layer from the ends of multiple optical fibers 200 to obtain optical fibers 200 with bare fibers 2001; passing the bare fibers 2001 of the multiple optical fibers 200 through the fiber optic through-hole 22 of the jumper 2 along the guide groove 232 of the jumper 2, then adding adhesive to the adhesive reservoir 231 of the jumper 2 until it slightly overflows from the first positioning section 222 of the fiber optic through-hole 22, and fixing the bare fibers 2001 of the optical fibers 200 to the jumper 2 after curing; cutting the bare fibers 2001 of the optical fibers 200 that have passed through the fiber optic through-hole 22 of the jumper 2 to a preset length (ensuring that this length is just enough for the bare fibers 2001 to be inserted into the second positioning section 132 of the fiber optic countersunk hole of the optical component 1 and the bare fibers 200... (The end face of 1 contacts the front end face of the second positioning section 132); Simultaneously, fix the optical component 1 onto the circuit board. Specifically, add adhesive to at least the dispensing groove 17 of the optical component 1 or the position on the inner circuit board corresponding to the dispensing groove 17 of the optical component 1, and then use adhesive to bond and fix the optical component 1 onto the circuit board; then add adhesive to the left and right sides and the front end of the optical component 1 to encapsulate the photoelectric conversion accommodating space 12 and its internal structure of the optical component 1, completing the fixed encapsulation of the optical component 1 on the circuit board. Finally, connect the front end of the jumper 2 containing the optical fiber 200 to the rear end of the optical component 1, so that each optical fiber through hole 22 is opposite to the corresponding optical fiber countersunk hole 13, thereby ensuring that the part of the optical fiber 200 that passes through the optical fiber through hole 22 of the optical component 1 can completely enter the optical fiber countersunk hole 13 and contact the bottom of the optical fiber countersunk hole 13. It should be noted that multiple optical fibers 200 can be arranged closely or spaced apart, and are placed into the corresponding optical fiber through holes according to the design requirements.

[0046] In the foregoing description of this application, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this application, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] Furthermore, the terms "first" or "second," etc., used in this application to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as explicitly or implicitly indicating relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0048] While various embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An optical fiber coupling device, characterized in that, include: An optical component includes a first block, a photoelectric conversion accommodating space disposed at the bottom front end of the first block, a plurality of optical fiber recesses disposed at the rear end of the first block and extending toward its front end, and a reflective surface disposed on the first block for implementing light propagation between the optical fiber recesses and the photoelectric conversion accommodating space. as well as A jumper includes a second block and a plurality of fiber optic through-holes disposed on the second block and penetrating the second block in a front-back direction; When the front end of the jumper is connected to the back end of the optical component, each of the fiber optic through holes is opposite to the corresponding fiber optic countersink.

2. The fiber optic coupling device according to claim 1, characterized in that, The fiber optic via includes, in a back-to-forehead direction, a first guide section having a guide cone surface for guiding the insertion of the bare fiber of the optical fiber, and a first positioning section for the bare fiber of the optical fiber to pass through and for positioning the bare fiber of the optical fiber. The first guide section includes, in a back-to-forehead direction, a cylindrical section and a conical section, wherein the large-diameter end of the conical section is connected to the cylindrical section, and the small-diameter end of the conical section is connected to the first positioning section.

3. The fiber optic coupling device according to claim 2, characterized in that, The minimum diameter of the first guide segment is greater than the diameter of the bare fiber, the maximum diameter of the first guide segment is greater than the minimum diameter of the first guide segment but less than the outer diameter of the coloring layer of the optical fiber, the first positioning segment is cylindrical, the minimum diameter of the first guide segment is the same as the diameter of the first positioning segment, and the maximum diameter of the first positioning segment is 0.01 mm greater than the diameter of the bare fiber.

4. The fiber optic coupling device according to claim 2 or 3, characterized in that, The length of the first positioning segment is 3 to 5 times the diameter of the bare fiber.

5. The fiber optic coupling device according to claim 2 or 3, characterized in that, The optical fiber countersink includes, in a back-to-forehead direction, a second guide section with a guide cone surface for guiding the insertion of the bare fiber and a second positioning section for receiving and positioning the bare fiber. The maximum diameter of the second guide section is greater than the diameter of the first positioning section but less than the outer diameter of the colored layer of the optical fiber. The minimum diameter of the second guide section is greater than the diameter of the bare fiber. The minimum diameter of the second guide section is the same as the diameter of the second positioning section. The second positioning section is cylindrical, and its maximum diameter is 0.01 mm larger than the diameter of the bare fiber.

6. The fiber optic coupling device according to any one of claims 1-3, characterized in that, The jumper further includes an adhesive groove disposed on the top rear end of the second block, and a plurality of guide grooves disposed on the bottom of the adhesive groove and matched and connected to each of the fiber optic through holes. The guide grooves are used to guide the bare fiber of the optical fiber into the corresponding fiber optic through hole and to accommodate the bare fiber of the optical fiber. The adhesive groove, guide grooves and fiber optic through holes are all used for adhesive, so that the adhesive can bond and fix the bare fiber of the optical fiber in the jumper after curing. The jumper also includes a locking groove disposed in the bottom of the adhesive groove and extending forward from the rear end of the second block. The locking groove is used to accommodate the coloring layer of the optical fiber, so that the end face of the coloring layer can abut against the groove wall of the locking groove near the optical component.

7. The fiber optic coupling device according to claim 6, characterized in that, The jumper also includes a left clamping groove and a right clamping groove respectively located on the left and right sides of the second block and symmetrical about the adhesive groove. The jumper also includes a left clearance notch and a right clearance notch respectively located at the bottom left and bottom right of the second block and intersecting the left clamping groove and the right clamping groove in sequence. The jumper also includes a left adhesive control notch and a right adhesive control notch respectively located at the top left and top right of the second block and intersecting the left clamping groove and the right clamping groove in sequence.

8. The fiber optic coupling device according to any one of claims 1-3, characterized in that, One of the rear end of the first block and the front end of the second block includes a first mating surface and a plurality of positioning posts spaced apart along the left-right direction on the first mating surface. The other of the rear end of the first block and the front end of the second block includes a second mating surface that matches and abuts the first mating surface, and a plurality of positioning holes formed on the second mating surface and respectively receiving the positioning posts. The first mating surface is formed on the first block, and the bottom of the rear end of the first block includes a boss provided on the first mating surface and extending from front to back. The second mating surface is formed on the second block, and the bottom of the front end of the second block includes a recess provided on the second mating surface for matching and receiving the boss. The optical component also includes a dispensing groove provided on the bottom of the first block and closer to the connector than the photoelectric conversion accommodating space. The dispensing groove is partially formed on the boss. The dispensing groove is configured to accommodate sufficient adhesive and meet the bonding and fixing requirements of the optical component. The height of the dispensing groove is configured such that the dispensing groove can squeeze the adhesive cured therein.

9. The fiber optic coupling device according to any one of claims 1-3, characterized in that, The photoelectric conversion accommodating space is a notch structure, which includes a first opening, a second opening, a third opening, and a fourth opening sequentially located at the bottom, front end, left side, and right side of the first block.

10. The fiber optic coupling device according to claim 9, characterized in that, The optical assembly further includes a lens structure disposed in the top region of the notch structure and below the reflective surface, and a retaining ridge disposed in the top region of the notch structure and further away from the connector than the lens structure.

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