Pluggable optical interface structure

Abstract

The invention provides a pluggable optical interface structure, and relates to the technical field of optical device packaging, and the pluggable optical interface structure comprises a substrate which is at least provided with an optical chip, and the optical chip is connected with the substrate; and the optical fiber array unit is connected with the optical chip in a positioning and plugging manner, so that the optical fiber array unit is conducted with the optical chip. The optical fiber array unit and the optical chip are connected in a positioning and plugging manner, so that additional structures and steps required by active coupling such as position adjustment of the optical fiber array unit and the optical chip are not required, and the optical fiber array unit and the optical chip can be aligned in a high-precision and passive coupling manner in a positioning and plugging manner; as a structure required by active coupling does not need to be additionally arranged, the packaging process can be greatly simplified, product production and maintenance of use links are facilitated, the production operation efficiency is effectively improved, the product cost is reduced, and the competitiveness of the product is further enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of optical device packaging, and in particular to a pluggable optical interface structure. Background Art

[0002] Silicon photonics chip technology has developed rapidly in recent years, with applications expanding from traditional optical communications to quantum computing, 6G communications, LiDAR, biosensing, and optical interconnects. This technology demonstrates broad market potential and has become a core driver in optical communications, data centers, and artificial intelligence. Optoelectronic co-packaging, as a packaging method for silicon photonics applications, has also garnered increasing attention.

[0003] In existing optoelectronic co-packaging solutions, the connection between the silicon photonic chip waveguide and the optical fiber array is mostly achieved through active coupling. During active coupling, it is necessary to connect a laser light source, use dedicated coupling equipment, adjust the relative position of the silicon photonic chip and the optical fiber array to achieve the optimal coupling state, and finally use high-strength glue for bonding to achieve permanent fixation of the optical interface. This solution is complex to operate and requires high precision. During the product production and testing process and the use and maintenance process, the optical fiber array cannot be immediately plugged in or replaced. Therefore, the high-precision, passive coupling alignment and pluggability of the silicon photonic chip optical waveguide and the optical fiber array have become the current technical difficulties. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a pluggable optical interface structure, which realizes high-precision, passive coupling alignment between an optical chip and an optical fiber array unit through a positioning plug-in connection between the two.

[0005] An embodiment of the present application provides a pluggable optical interface structure, comprising: a substrate, on which at least an optical chip is arranged, and the optical chip is interconnected with the substrate; and an optical fiber array unit, which is positioned and pluggable with the optical chip to enable optical conduction between the optical fiber array unit and the optical chip.

[0006] The pluggable optical interface structure provided in the embodiments of the present application performs a positional plug-and-unplug connection between the optical fiber array unit and the optical chip. This eliminates the need for additional structures and steps required for active coupling, such as adjusting the positions of the optical fiber array unit and the optical chip. The positional plug-and-unplug connection method enables high-precision, passive coupling alignment between the optical fiber array unit and the optical chip. Since no additional structures required for active coupling are required, the packaging process can be greatly simplified, facilitating maintenance during product production and use, effectively improving production operation efficiency, reducing product costs, and thereby enhancing product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 This is a schematic diagram of the structure of a pluggable optical interface provided by an embodiment of the present application;

[0009] Figure 2 This is a schematic diagram of the substrate surface packaging of the pluggable optical interface structure provided in the embodiment of the present application

[0010] Figure 3 This is a schematic diagram of the installation of an optical chip and a substrate of a pluggable optical interface structure provided by an embodiment of the present application;

[0011] Figure 4 This is a schematic diagram of the installation of the chip body and the first base of the pluggable optical interface structure provided in an embodiment of the present application;

[0012] Figure 5 This is a schematic diagram of the chip body structure of the pluggable optical interface structure provided in an embodiment of the present application;

[0013] Figure 6 This is a light path diagram of the optical chip and optical fiber array unit of the pluggable optical interface structure provided by an embodiment of the present application;

[0014] Figure 7 This is a schematic diagram of the first base structure of the pluggable optical interface structure provided in an embodiment of the present application;

[0015] Figure 8 This is a schematic diagram of the second base structure of the pluggable optical interface structure provided in an embodiment of the present application;

[0016] Figure 9 This is a schematic diagram of the positioning of the substrate and guide seat of the pluggable optical interface structure provided in an embodiment of the present application;

[0017] Figure 10 This is a schematic diagram of the guide seat structure of the pluggable optical interface structure provided in an embodiment of the present application;

[0018] Figure 11 This is a schematic diagram of the pluggable optical interface structure provided by an embodiment of the present application;

[0019] Figure 12 Schematic diagram of the rough alignment effect between the guide seat and the optical fiber array unit of the pluggable optical interface structure provided by an embodiment of the present application;

[0020] Figure 13 This is a schematic diagram of the precise alignment effect between the first base and the optical fiber array unit of the pluggable optical interface structure provided by an embodiment of the present application;

[0021] Figure 14 This is a schematic diagram of the first base structure of the pluggable optical interface structure provided in an embodiment of the present application;

[0022] Figure 15 This is one of the schematic diagrams of the optical fiber array unit structure of the pluggable optical interface structure provided in an embodiment of the present application;

[0023] Figure 16 This is an exploded view of the optical fiber array unit of the pluggable optical interface structure provided in an embodiment of the present application;

[0024] Figure 17 This is the second structural diagram of the optical fiber array unit of the pluggable optical interface structure provided in an embodiment of the present application;

[0025] Figure 18 This is a schematic diagram of the third base structure of the pluggable optical interface structure provided in an embodiment of the present application;

[0026] Figure 19 This is the third structural diagram of the optical fiber array unit of the pluggable optical interface structure provided in an embodiment of the present application;

[0027] Figure 20 This is a schematic diagram of the installation of a spring lock of a pluggable optical interface structure provided by an embodiment of the present application;

[0028] Figure 21 It is a schematic diagram of the locking state of the spring lock and the guide seat of the pluggable optical interface structure provided by an embodiment of the present application.

[0029] Icons: 10-substrate; 101-solder ball array package; 102-groove; 103-first mounting hole; 11-optical chip; 110-chip body; 1100-optical waveguide; 1101-cage; 111-first base; 1110-first reflector; 1111-cage protrusion; 1112-second guide groove; 1112a-limiting platform; 1112b-first transition structure; 12-dedicated electronic chip; 13-driving electronic chip; 14-transimpedance amplifier chip; 15-guide seat; 150-locating pin; 151-first guide groove; 152-first locking tooth groove; 16-fiber array unit ;16a-fiber array;160-second base;1601-second reflector;1602-second guide protrusion;1603-mounting groove;1604-second transition structure;161-optical fiber;162-third base;1620-limiting boss;1621-second locking tooth groove;163-elastic member;164-first cover plate;165-spring clip lock;1651-boss;1652-locking tooth;1653-pressing handle;166-second cover plate;167-screw;168-second mounting hole;169-positioning column;F-plugging direction;F1-first direction;F2-second direction. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0031] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0032] It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] Please refer to Figure 1As shown, an embodiment of the present application provides a pluggable optical interface structure, including: a substrate 10, on which at least an optical chip 11 is arranged. For example, the optical chip 11 can be a silicon photonic chip, and the optical chip 11 is interconnected with the substrate 10; and also includes an optical fiber array unit 16, which is positioned and plugged in connection with the optical chip 11 to enable optical conduction between the optical fiber array unit 16 and the optical chip 11.

[0034] The optical chip 11 is located on the substrate 10. In addition to the optical chip 11, other chips for assisting the optical chip 11 in implementing related functions may also be provided on the substrate 10. For example, Figure 1 、 Figure 2 As shown, a dedicated electronic chip 12 is also provided on the substrate 10, and a driving electronic chip 13 and a transimpedance amplifier chip 14 are also provided on the optical chip 11. The dedicated electronic chip 12 and the optical chip 11 are both mounted on the substrate 10 through a ball array package 101 (BGA), and the driving electronic chip 13 and the transimpedance amplifier chip 14 are both mounted on the optical chip 11 through BGA.

[0035] The optical chip 11 and the dedicated electronic chip 12 are interconnected with the substrate 10. The driving electronic chip 13 and the transimpedance amplifier chip 14 are interconnected with the substrate 10 through the optical chip 11. The dedicated electronic chip 12, the driving electronic chip 13 and the transimpedance amplifier chip 14 are respectively connected to the optical chip 11 for signal transmission to realize corresponding functions.

[0036] An optical fiber array unit 16 is provided on one side of the substrate 10 . The optical fiber array unit 16 and the optical chip 11 are positioned and plugged in. After the two are plugged in and connected, light conduction between the optical fiber array unit 16 and the optical chip 11 can be achieved.

[0037] The pluggable optical interface structure provided in the embodiment of the present application performs a positioning plug-and-unplug connection between the optical fiber array unit 16 and the optical chip 11. This eliminates the need for additional structures and steps required for active coupling, such as adjusting the positions of the optical fiber array unit 16 and the optical chip 11. The positioning plug-and-unplug connection method enables high-precision, passive coupling alignment between the optical fiber array unit 16 and the optical chip 11. Since no additional structures required for active coupling are required, the packaging process can be greatly simplified, facilitating maintenance during product production and use, effectively improving production operation efficiency, reducing product costs, and thereby enhancing product competitiveness.

[0038] Specifically, the optical chip 11 includes a first base 111 and a chip body 110 arranged on the first base 111, an optical waveguide 1100 is arranged on the chip body 110, and the optical fiber array unit 16 includes a second base 160 and an optical fiber 161 arranged in the second base 160; the first base 111 and the second base 160 are arranged relative to each other so that the optical fiber 161 is located between the first base 111 and the second base 160, a first reflector 1110 is provided on the side of the first base 111 facing the second base 160, and a second reflector 1601 is provided on the side of the second base 160 facing the first base 111.

[0039] Light enters from the optical fiber 161 and is emitted through the optical fiber 161. The light emitted from the optical fiber 161 is then expanded and collimated by the second reflector 1601 and converged by the first reflector 1110. It is then focused on the end face of the optical waveguide 1100 facing the first reflector 1110. The size of the focused light spot matches the size of the optical waveguide 1100.

[0040] The chip body 110 is provided with an optical waveguide 1100 and the aforementioned BGA for mounting each chip. The chip body 110 is located on a first base 111. Figure 3 As shown, the end of the chip body 110 where the optical waveguide 1100 is provided is provided on the first base 111 , and the end of the chip body 110 where the BGA is provided extends outward from the first base 111 and onto the substrate 10 .

[0041] like Figure 4 As shown, a groove 102 is provided on the substrate 10, and a first base 111 is provided in the groove 102. One end of the chip body 110 providing an optical waveguide 1100 is adhered to the first base 111, and the end of the chip body 110 away from the optical waveguide 1100 is adhered to the substrate 10. In other words, the chip body 110 is adhered to the first base 111 and the substrate 10 at the same time.

[0042] like Figure 3 、 Figure 5 In the example, along the plug-in and pull-out direction F between the optical fiber array unit 16 and the optical chip 11, a card slot 1101 is provided on the chip body 110, and a card protrusion 1111 is provided on the first base 111. The card slot 1101 and the card protrusion 1111 cooperate with each other to enable the chip body 110 and the first base 111 to be plugged in along the plug-in and pull-out direction F.

[0043] The combination of the slot 1101 and the protrusion 1111 allows the chip body 110 to be snapped into place with the first base 111, enabling assembly and positioning along the insertion direction F and the second direction F2 (vertical direction). This snap-fit ​​connection allows for quick and easy connection between the chip body 110 and the first base 111, with excellent connection stability.

[0044] Furthermore, the latching groove 1101 is a trapezoidal latching groove 1101, and the latching protrusion 1111 is a trapezoidal latching protrusion 1111, with the small end of the trapezoid away from the first base 111. The chip body 110 can be guided along the small end of the trapezoid and latched into the latching groove 1101 of the first base 111. The arrangement of the trapezoidal latching groove 1101 and the trapezoidal latching protrusion 1111 can enhance the stability of the latching connection between the chip body 110 and the first base 111, making the latching connection between the chip body 110 and the first base 111 tighter and enabling micron-level latching assembly.

[0045] In some embodiments, the trapezoidal slot 1101 on the chip body 110 can be processed using a deep etching process to ensure three-dimensional alignment accuracy between the slot 1101 and the optical waveguide 1100. The protrusion 1111 on the first base 111 can be processed using a laser direct writing process to ensure three-dimensional alignment accuracy between the protrusion 1111 and the first reflector 1110. After the chip body 110 and the first base 111 are assembled using a mechanical limit structure, they can be permanently bonded using glue to form the entire optical chip 11, which can then be mounted on the substrate 10 using a BGA.

[0046] When the optical chip 11 and the optical fiber array unit 16 are light-conducting, refer to Figure 6 As shown, the first base 111 and the second base 160 are relatively buckled, the optical fiber 161 is located in the second base 160 on the side facing the first base 111, the second base 160 is provided with a second reflector 1601, and the first base 111 is correspondingly provided with a first reflector 1110. After the light is emitted through the optical fiber 161, it is expanded between the end face of the optical fiber 161 and the second reflective lens. For example, the spot size can be expanded from a diameter of 9.2 μm to about 100 μm. The expanded size of the light can be specifically adjusted by the second reflector. The light is totally reflected at the second reflector 1601, and the reflected light is collimated and directly incident on the surface of the first reflector 1110. The light is totally reflected again on the surface of the first reflector 1110, and the reflected light is focused, with the focus just at the end face of the optical waveguide 1100 facing the first reflector 1110. The size of the focused light spot matches the size of the optical waveguide 1100, which is achieved by designing the key parameters such as the position and curvature radius of the first reflector 1110.

[0047] Furthermore, since the optical path is reversible, the light emitted from the optical waveguide 1100 of the optical chip 11 can also enter the optical fiber 161 along the reverse direction of the optical path.

[0048] By setting the first reflector 1110 and the second reflector 1601, a turning light path is formed between the optical fiber 161 and the optical waveguide 1100. The first reflector 1110 and the second reflector 1601 are used to realize beam expansion, collimation and focusing of light, which can increase the coupling tolerance and realize horizontal coupling of the end face coupler.

[0049] Figure 1 In the embodiment, there are multiple optical fibers 161, and the multiple optical fibers 161 are arranged side by side along the first direction F1. Figure 3 、 Figure 7 、 Figure 8 As shown, there are multiple optical waveguides 1100, multiple first reflectors 1110 and multiple second reflectors 1601, and the multiple optical waveguides 1100, multiple first reflectors 1110 and multiple second reflectors 1601 are arranged in an array along the first direction F1 to correspond one to one with the optical fibers 161, and the second direction F2, the first direction F1 and the plugging direction F are perpendicular to each other.

[0050] The multiple optical fibers 161 can receive multiple beams of light, which pass through the corresponding first reflector 1110 and the second reflector 1601 , and are focused on the end face of the optical waveguide 1100 facing the first reflector 1110 to form a desired light spot.

[0051] Refer again Figure 1 、 Figure 9 、 Figure 10 As shown, it also includes a guide seat 15, which is positioned and installed on the substrate 10. A positioning pin 150 is set on the guide seat 15, and a first mounting hole 103 is set on the substrate 10. The positioning pin 150 and the first mounting hole 103 are matched with each other to achieve the positioning and assembly of the guide seat 15 and the substrate 10; in other examples, the guide seat 15 and the substrate 10 can also be permanently connected by glue or welding.

[0052] like Figure 10 、 Figure 11 As shown, a coarse alignment structure is provided between the guide seat 15 and the optical fiber array unit 16. Along the plug-in and pull-out direction F of the optical fiber array unit 16 and the optical chip 11, the coarse alignment structure includes a first guide groove 151 provided on the guide seat 15, and a first guide boss provided on the second base 160. Through the cooperation between the first guide groove 151 and the first guide boss, the optical fiber array unit 16 can be coarsely positioned and plugged in along the plug-in and pull-out direction F with the optical chip 11 through the guide seat 15.

[0053] The first guide groove 151 and the first guide boss are both extended along the plug-in direction F. When the optical fiber array unit 16 is inserted into the optical chip 11, the first guide boss on the second base 160 is first inserted into the first guide groove 151 of the guide seat 15 to achieve rough alignment, so that the optical fiber array unit 16 can be inserted into the guide seat 15 more conveniently. The preliminary insertion is completed through rough alignment to form Figure 12 The instrumentation status is shown.

[0054] When the optical fiber array unit 16 is pushed forward a certain distance toward the optical chip 11 along the plug-in direction F, the first base 111 of the optical chip 11 and the second base 160 in the optical fiber array unit 16 will enter the precise assembly stage. The two will first realize the transition between coarse alignment and fine alignment through their respective transition structures, and then realize the final three-dimensional micron-level assembly through the fine alignment structure. Figure 13 shown.

[0055] Specifically, refer to Figure 8 、 Figure 14 As shown, a precision alignment structure is also formed between the optical chip 11 and the optical fiber array unit 16. Along the plug-in and pull-out direction F of the optical fiber array unit 16 and the optical chip 11, the precision alignment structure includes a second guide groove 1112 provided on the first base 111, and a second guide protrusion 1602 provided on the second base 160. The second guide groove 1112 cooperates with the second guide protrusion 1602 to limit the second base 160 in the second guide groove 1112 along the first direction F1.

[0056] A second guide groove 1112 is provided on the first base 111 along the insertion and removal direction F. There are two second guide grooves 1112, one at each end of the first base 111 along the first direction F1. The two symmetrically distributed second guide grooves 1112 can radially limit the optical fiber array unit 16 within the second guide grooves 1112 (limiting in the first direction F1), thereby achieving precise alignment between the optical chip 11 and the optical fiber array unit 16. For example, the second guide grooves 1112 are semi-cylindrical guide grooves, and correspondingly, the second guide protrusions 1602 are semi-cylindrical guide protrusions.

[0057] On this basis, along the plugging direction F, a limiting platform 1112 a is provided at the end of the second guide groove 1112 close to the optical waveguide 1100 , for limiting the second base 160 along the plugging direction F in the second guide groove 1112 .

[0058] A limiting platform 1112a is provided at the bottom of the second guide groove 1112, and the limiting platform 1112a is provided close to the optical waveguide 1100. When the second base 160 is pushed into the second guide groove 1112 of the first base 111 through its second guide protrusion 1602, the limiting platform 1112a can prevent the second base 160 from continuing to advance, so as to realize the axial limitation (plugging and unplugging direction F) of the optical fiber array unit 16 in the second guide groove 1112.

[0059] In addition, along the plug-in direction F, the second guide groove 1112 forms a first transition structure 1112b near the end of the optical fiber array unit 16, and a second transition structure 1604 is correspondingly provided on the second base 160. Through the first transition structure 1112b and the second transition structure 1604, the first base 111 and the second base 160 can be precisely assembled.

[0060] In the embodiments of the present application, Figure 8 、 Figure 14 As shown, the first transition structure 1112b of the second guide groove 1112 is a conical chamfer and is located at the front end of the second guide groove 1112, that is, the end facing the optical fiber array unit 16; the second transition structure 1604 on the second base 160 is a bevel chamfer. When the optical fiber array unit 16 is inserted into the optical chip 11, the first transition structure 1112b and the second transition structure 1604 can achieve smooth and precise assembly of the two, which is conducive to improving the alignment accuracy of the two.

[0061] Regarding the optical fiber array unit 16, refer to Figure 15 、 Figure 16 As shown, the optical fiber array unit 16 includes a third base 162 and a first cover plate 164 arranged on the third base 162. A receiving cavity is formed between the third base 162 and the first cover plate 164. The optical fiber array 16a is arranged in the receiving cavity. The optical fiber array 16a is slidably arranged in the third base 162 along the plug-in and pull-out direction F between the optical fiber array unit 16 and the optical chip 11.

[0062] The third base 162 can be used as a shell of the optical fiber array unit 16, and one of its functions is to achieve rough alignment between the optical fiber array unit 16 and the first base 111, such as Figure 6 As shown, the third base 162 can be positioned below the first base 111. A second function is to provide a protective cover for the second base 160 and second cover 166, preventing damage to the fragile parts of the fiber array unit 16 during repeated insertion and removal. A third function is to cooperate with the spring lock 165 and elastic member 163 to provide axial cushioning and locking of the fiber array unit 16 during insertion and removal (insertion and removal direction F).

[0063] The third base 162 serves as a shell, and can be made of metal or other suitable materials to protect the second base 160 and the second cover 166 made of glass inside.

[0064] As the main structure of the optical fiber array unit 16 , the optical fiber array 16 a includes a second base 160 , an optical fiber 161 and a second cover 166 . The second base 160 is relatively buckled into the third base 162 , and the optical fiber 161 is located between the second cover 166 and the second base 160 .

[0065] The second base 160 is used to guide the plugging and unplugging with the first base 111 so that the optical fiber array unit 16 as a whole can be plugged and unplugged with the optical chip 11. A receiving cavity is formed between the second cover plate 166 and the second base 160 to accommodate the optical fiber 161, so that the optical fiber 161 can be stably installed on the second base 160.

[0066] The second base 160 may be provided with mounting grooves 1603 arranged in an array along the first direction F1. The mounting grooves 1603 are used to arrange the optical fibers 161. For example, Figure 8 As shown, the mounting groove 1603 may be a V-shaped groove to clamp the optical fiber 161 .

[0067] The second base 160 can be processed by laser direct writing technology to ensure the three-dimensional spatial position accuracy of the V-groove, the second reflector 1601 and the second guide protrusion 1602. The optical fiber 161 is installed in the V-groove, and the second cover plate 166 is installed above the optical fiber 161. The three are bonded together using glue. Figure 17 shown.

[0068] Furthermore, a limiting boss 1620 is provided on one side of the third base 162 along the plugging direction F close to the optical chip 11 for limiting the position of the optical fiber array 16a when it slides along the plugging direction F in the third base 162 .

[0069] like Figure 18 、 Figure 19 As shown, an elastic member 163 is further provided on the side of the third base 162 away from the optical chip 11 along the plug-in direction F. The elastic member 163 can be a spring. The optical fiber array 16a is installed in the third base 162. The two elastic members 163 and the limiting boss 1620 can make the optical fiber array 16a move axially along the plug-in direction F in the third base 162, thereby realizing axial buffering of the optical fiber array 16a during insertion.

[0070] Reference Figure 20 、 Figure 21 As shown, a spring lock 165 is further provided between the third base 162 and the first cover 164 . The spring lock 165 has a boss 1651 along the plug-in direction F. The boss 1651 and the second direction F2 form an angle to press the second base 160 .

[0071] The spring lock 165 is made of an elastic material with a certain strength and is installed on the positioning column 169 above the third base 162 through two second mounting holes 168. At the same time, it is fastened with screws 167 in conjunction with the first cover plate 164 to ensure that the spring lock 165 is reliably installed on the third base 162.

[0072] A boss 1651 that is tilted at a certain angle is provided in the middle of the spring lock 165. The boss 1651 is arranged along the plug-in direction F. The tilted side of the boss 1651 presses on the upper surface of the second base 160 of the optical fiber array 16a, so that the optical fiber array 16a can be both limited and buffered in the second direction F2 (vertical direction) inside the third base 162, thereby ensuring the flexibility of the optical fiber array 16a when it moves axially along the plug-in direction F inside the third base 162.

[0073] In addition, the spring lock 165 has a locking tooth 1652 along the first direction F1, the guide seat 15 is correspondingly provided with a first locking tooth groove 152, and the third base 162 is correspondingly provided with a second locking tooth groove 1621. Through the cooperation between the locking tooth 1652 and the first locking tooth groove 152 and the second locking tooth groove 1621, the optical fiber array unit 16 is locked in the guide seat 15 along the plug-in direction F.

[0074] As mentioned above, when the optical fiber array unit 16 is inserted, after two steps of coarse alignment and fine alignment, the optical fiber array 16a is pushed to move in the third base 162 along the insertion and removal direction F. When encountering the limiting boss 1620, the optical fiber array 16a stops moving.

[0075] A pressing handle 1653 is further provided on the side of the spring lock 165 away from the optical chip 11. There are two pressing handles 1653 along the first direction F1. When the two pressing handles 1653 are close to each other, the locking teeth 1652 slide out from the first locking tooth groove 152 to pull out the optical fiber array unit 16 from the optical chip 11.

[0076] During the sliding of the optical fiber array 16a in the third base 162 along the plug-in and pull-out direction F, the elastic member 163 is compressed. When the compression amount reaches a certain value, the two locking teeth 1652 of the spring lock 165 along the first direction F1 will enter the first locking tooth groove 152 of the guide seat 15. The locking teeth 1652 will naturally open when the pressing handle of the spring lock 165 is not subjected to the clamping force, and will be firmly locked with the first locking tooth groove 152 of the guide seat 15, ensuring the locking of the optical fiber array unit 16 in the plug-in and pull-out direction F.

[0077] When pulling out the optical fiber array unit 16 in the reverse direction, the pressing handle 1653 on the spring lock 165 is gently pressed by the finger to move the two pressing handles 1653 closer to each other. When the two pressing handles 1653 are close to a certain distance, the locking teeth 1652 will slide out of the first locking tooth groove 152 of the guide seat 15. The optical fiber array unit 16 loses its locking in the insertion and removal direction F and can be pulled out, thereby separating the optical fiber array unit 16 and the optical chip 11.

[0078] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A pluggable optical interface structure, characterized in that: include: a substrate, on which at least an optical chip is disposed, and the optical chip is interconnected with the substrate; It also includes an optical fiber array unit, which is connected to the optical chip in a positioning and plugging manner so that the optical fiber array unit and the optical chip are optically connected.

2. The pluggable optical interface structure according to claim 1, wherein: The optical chip includes a first base and a chip body disposed on the first base, an optical waveguide being disposed on the chip body, and the optical fiber array unit includes a second base and an optical fiber disposed within the second base; the first base and the second base are disposed relative to each other so that the optical fiber is located between the first base and the second base, a first reflector is disposed on a side of the first base facing the second base, and a second reflector is disposed on a side of the second base facing the first base; The light emitted from the optical fiber is sequentially expanded and collimated by the second reflector and converged by the first reflector, and then focused on the end face of the optical waveguide facing the first reflector.

3. The pluggable optical interface structure according to claim 2, wherein: Along the plugging and unplugging direction of the optical fiber array unit and the optical chip, a card slot is provided on the chip body, and a card protrusion is provided on the first base, and the card slot and the card protrusion cooperate to enable the chip body and the first base to be plugged in along the plugging and unplugging direction; The clamping slot is a trapezoidal clamping slot, the clamping protrusion is a trapezoidal clamping protrusion, and the small end of the trapezoid is away from the first base.

4. The pluggable optical interface structure according to claim 2, wherein: There are multiple optical fibers, and the multiple optical fibers are arranged side by side along a first direction; There are multiple optical waveguides, multiple first reflectors, and multiple second reflectors, respectively. The multiple optical waveguides, multiple first reflectors, and multiple second reflectors are arranged in an array along the first direction to correspond one-to-one with the optical fibers. The first direction is perpendicular to the plugging and unplugging direction of the optical fiber array unit and the optical chip.

5. The pluggable optical interface structure according to claim 2, wherein: A guide seat is also positioned and installed on the substrate, and a coarse alignment structure is provided between the guide seat and the optical fiber array unit; Along the plugging and unplugging direction of the optical fiber array unit and the optical chip, the coarse alignment structure includes a first guide groove provided on the guide seat and a first guide boss provided on the second base. The first guide groove cooperates with the first guide boss to enable the optical fiber array unit to be coarsely positioned and plugged and unplugged along the plugging and unplugging direction with the optical chip through the guide seat.

6. The pluggable optical interface structure according to claim 2, wherein: A fine alignment structure is further formed between the optical chip and the optical fiber array unit. Along the insertion and removal direction of the optical fiber array unit and the optical chip, the fine alignment structure includes a second guide groove provided on the first base and a second guide boss provided on the second base. The second guide groove and the second guide boss cooperate to limit the second base in the second guide groove along the first direction. Along the plugging and unplugging direction, a limiting platform is provided at the end of the second guide groove close to the optical waveguide, for limiting the position of the second base in the second guide groove along the plugging and unplugging direction; Along the plugging and unplugging direction, the second guide groove forms a first transition structure near the end of the optical fiber array unit, and a second transition structure is correspondingly provided on the second base. Through the first transition structure and the second transition structure, the first base and the second base are precisely assembled.

7. The pluggable optical interface structure according to any one of claims 2 to 6, characterized in that: The optical fiber array unit includes a third base and a first cover plate arranged on the third base, a receiving cavity is formed between the third base and the first cover plate, an optical fiber array is arranged in the receiving cavity, and the optical fiber array is slidably arranged in the third base along the plugging and unplugging direction of the optical fiber array unit and the optical chip; The optical fiber array includes the second base, the optical fiber and a second cover plate, the second base is relatively buckled in the third base, and the optical fiber is located between the second cover plate and the second base; A limiting boss is further provided on one side of the third base along the plugging and unplugging direction close to the optical chip, for limiting the position of the optical fiber array when it slides along the plugging and unplugging direction within the third base.

8. The pluggable optical interface structure according to claim 7, wherein: A spring lock is further provided between the third base and the first cover plate, the spring lock having a boss along the plugging and unplugging direction, the boss and the second direction forming an angle to press the second base, and the second direction, the first direction and the plugging and unplugging direction are perpendicular to each other; The spring lock has a locking tooth along the first direction, and the guide seat is correspondingly provided with a first locking tooth groove. The locking tooth and the first locking tooth groove cooperate to lock the optical fiber array unit in the guide seat along the plugging and unplugging direction.

9. The pluggable optical interface structure according to claim 8, wherein: A pressing handle is also provided on the side of the spring lock away from the optical chip. There are two pressing handles along the first direction. When the two pressing handles are close to each other, the locking tooth slides out of the first locking tooth groove to pull out the optical fiber array unit from the optical chip.

10. The pluggable optical interface structure according to claim 8 or 9, characterized in that: An elastic member is further provided on a side of the third base away from the optical chip along the plug-in and pull-out direction. When the optical fiber array slides in the third base along the plug-in and pull-out direction, the elastic member is compressed and the locking teeth are locked in the first locking tooth groove to lock the optical fiber array unit along the plug-in and pull-out direction.

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