AOC optical module

Abstract

The utility model relates to the technical field of optical communication, and provides an AOC optical module, which comprises a PCB and a base for mounting the PCB, a positioning column for positioning the PCB is arranged in an inner cavity of the base, the positioning column is positioned in the middle of the PCB, and a boss capable of abutting against the side edge of the PCB is arranged at the end, close to an electric port, of the base. According to the utility model, the PCB positioning column is arranged at the middle part of the PCB, and the PCB is ensured to be centered through the boss at the side edge of the base at the electric port, so that the PCB positioning column at the electric port is omitted, and a space for placing a driving chip and a trans-impedance amplifier chip is vacated for the electric port; the driving chip and the transimpedance amplifier chip can be close to the electric port as far as possible, and the high-speed wiring of the driving chip and the transimpedance amplifier chip can be shortest on the premise of conforming to the protocol.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, in particular to an AOC optical module. Background Art

[0002] The transmission distance requirement of optical modules for data communication is relatively short, and the use distance is usually several hundred meters, so in data centers, SR, DR or AOC products are often used. Compared with single-mode modules with longer transmission distances, these modules are more expensive, and the signal is easily lost inside the module, making the performance of the optical module fail to meet the requirements.

[0003] For AOC optical modules, the existing AOC optical cables are not well fixed, which affects the performance of the module. In addition, the existing base has PCB board positioning columns at both the optical port and the electrical port, which limits the space at the electrical port, affects the location of the driver chip and the transimpedance amplifier chip, and causes the high-speed line routing of the driver chip and the transimpedance amplifier chip to be long, which is not conducive to signal transmission. Utility Model Content

[0004] The purpose of the utility model is to provide an AOC optical module, which can at least solve some of the defects in the prior art.

[0005] To achieve the above-mentioned purpose, an embodiment of the utility model provides the following technical solution: an AOC optical module, comprising a PCB board and a base for mounting the PCB board, a positioning column for positioning the PCB board is provided in the inner cavity of the base, the positioning column is located in the middle of the PCB board, and a boss that can abut the side of the PCB board is provided at the end of the base close to the electrical port.

[0006] Furthermore, the boss is arranged on the inner side wall of the base, and the boss is arranged on one opposite inner side wall of the base, and the protruding sizes of the two bosses are consistent.

[0007] Furthermore, a driving chip and a transimpedance amplifier chip are provided on the PCB board, and the driving chip and the transimpedance amplifier chip are both arranged on the PCB board near the electrical port.

[0008] Furthermore, it also includes an upper cover, and the base and the upper cover are clamped at the electrical port.

[0009] Furthermore, a card slot is provided at one end of the base close to the electrical port, and a card hook is provided at one end of the upper cover close to the electrical port, and the card hook is inserted into the card slot.

[0010] Furthermore, the hook extends toward the optical port.

[0011] Furthermore, the distance between the hook and the bottom surface of the base is greater than 6.3 mm.

[0012] Furthermore, it also includes an AOC optical cable. The upper cover and the base are combined to form a shell with an inner cavity. The side of the shell facing the optical port is provided with an opening for the AOC optical cable to extend into.

[0013] Furthermore, the AOC optical cable is fixed by screws.

[0014] Furthermore, the screw is screwed into the base from the side of the base, and the head of the screw abuts against the AOC optical cable.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. By setting screws on the side of the base to fix the MPO plug, the stability of the AOC optical cable position can be ensured. In addition, screws can be set from the side without affecting the height space of the optical module.

[0017] 2. By setting the PCB board positioning column in the middle of the PCB board, and then ensuring the centering of the PCB board through the boss on the side of the base at the electrical port, the PCB board positioning column at the electrical port is eliminated, and space is freed up at the electrical port for the driver chip and the transimpedance amplifier chip to be placed, so that the driver chip and the transimpedance amplifier chip can be as close to the electrical port as possible, and the high-speed routing of the driver chip and the transimpedance amplifier chip can be as short as possible under the premise of complying with the protocol.

[0018] 3. The upper cover and the base are assembled in the form of electrical port clip-on. On the one hand, it improves the assembly efficiency of the two, and on the other hand, it solves the problem of no positioning column at the electrical port for screw fixing, ensuring the tight assembly of the upper cover and the base at the electrical port.

[0019] 4. Designing a fiber tray on the PCB board can facilitate the routing and fixation of optical fibers.

[0020] 5. By designing the V-groove and the groove on the cover plate, the optical fiber fusion position can be placed in the groove, which can accommodate the diameter change of the fiber core caused by the fusion, thereby avoiding the size change between the cores caused by the diameter change and improving the production yield of MFD optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a single-mode AOC optical module provided in an embodiment of the utility model;

[0022] Figure 2 for Figure 1 Schematic diagram with the top cover removed;

[0023] Figure 3 for Figure 1 Schematic diagram with the base removed;

[0024] Figure 4An enlarged schematic diagram of the electrical port of a single-mode AOC optical module provided in an embodiment of the utility model (reflecting the matching of the card slot and the card hook);

[0025] Figure 5 for Figure 4 A schematic diagram of the base;

[0026] Figure 6 for Figure 4 A schematic diagram of the upper cover;

[0027] Figure 7 A schematic diagram of a front view of a single-mode AOC optical module provided by an embodiment of the utility model with the upper cover and the base removed;

[0028] Figure 8 A schematic diagram of a single-mode AOC optical module provided by an embodiment of the utility model with the upper cover and the base removed from the reverse side;

[0029] Fig. 9 A schematic diagram of a single-mode AOC optical module without an AOC optical cable provided by an embodiment of the utility model;

[0030] Fig.10 A schematic diagram of a first viewing angle of an optical fiber array of a single-mode AOC optical module provided in an embodiment of the utility model;

[0031] Fig.11 A second perspective schematic diagram of an optical fiber array of a single-mode AOC optical module provided by an embodiment of the utility model;

[0032] Fig.12 A schematic diagram of a single-mode AOC optical module provided by an embodiment of the present utility model, in which an upper cover is rotatably assembled on a base;

[0033] Fig.13 A schematic diagram of a single-mode AOC optical module without a base provided by an embodiment of the utility model (reflecting a driver chip and a transimpedance amplifier chip);

[0034] In the accompanying drawings: 1-base; 2-PCB board; 3-upper cover; 4-positioning column; 5-boss; 6-driver chip; 7-transimpedance amplifier chip; 8-card slot; 9-hook; 10-opening; 11-screw; 12-optical fiber array; 13-square groove; 14-fiber tray; 15-horizontal plane; 16-chamfered shape; 17-AOC optical cable; 18-MPO plug; a-optical port; b-electrical port. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1 , Figure 2 and Figure 3 The present utility model provides a single-mode AOC optical module, including an AOC optical cable 17, a base 1 and an upper cover 3. The base 1 and the upper cover 3 are combined to form a housing for inserting the AOC optical cable 17. The AOC optical cable 17 has an MPO plug 18. The base 1 is provided with a screw 11 hole near the optical port a, and the screw 11 holes are provided on one opposite side of the base 1. Each of the screw 11 holes is provided with a screw 11 for fixing the MPO plug 18 of the AOC optical cable 17. In this embodiment, the AOC optical cable 17 is provided at the optical port a of the optical module, and its optical fiber is connected to the optical engine. The inner cavity of the base 1 and the upper cover 3 cooperate to form a cavity, which can be inserted into the AOC optical cable 17. The AOC optical cable 17 includes an MPO plug 18, and specifically, the MPO plug 18 partially extends into the shell. The MPO plug 18 can be fixed by setting a screw 11 to ensure the stability of the position of the AOC optical cable 17. Specifically, the screw 11 is screwed into the base 1 from the side of the base 1, and the head of the screw 11 abuts against the MPO plug 18 of the AOC optical cable 17. Preferably, the upper cover 3 and the base 1 are enclosed to form a shell with an inner cavity, and the side of the shell facing the optical port a is provided with an opening 10 for the AOC optical cable 17 to extend into.

[0037] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 and Figure 3 , the screws 11 are arranged perpendicular to the side of the base 1. In this embodiment, the screws 11 are arranged from the side, which will not affect the height space of the optical module.

[0038] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 and Fig. 9, the base 1 and the upper cover 3 are clamped at the electrical port b. In this embodiment, compared with the traditional method of fixing the base 1 and the upper cover 3 with screws at the electrical port b, the screws need screw columns for installation, which will occupy the space at the electrical port b. This embodiment adopts the form of clamping at the electrical port b, which can free up more space for the circuit board at the electrical port b.

[0039] To further optimize the above solution, please refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 and Fig. 9 , a card slot 8 is provided at one end of the base 1 close to the electrical port b, and a card hook 9 is provided at one end of the upper cover 3 close to the electrical port b, and the card hook 9 is snapped into the card slot 8. In this embodiment, the snap connection is in the form of a card slot 8 provided on the base 1, and a card hook 9 provided on the upper cover 3, and the connection between the base 1 and the upper cover 3 can be achieved by snapping the card hook 9 into the card slot 8. Then, screws are provided on the positioning column 4 located in the middle of the PCB board 2 and screws are provided at the end of the upper cover 3 close to the optical port a, so as to ensure the stable assembly of the upper cover 3 and the base 1. Preferably, the card hook 9 extends in the direction of the optical port a. The distance between the card hook 9 and the bottom surface of the base 1 is above 6.3 mm, which can meet the requirements of the protocol.

[0040] To further optimize the above solution, please refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 and Fig. 9 , the slot 8 and the hook 9 are rotatably assembled. When the hook 9 is inserted into the slot 8, the hook 9 is rotated until the upper cover 3 is parallel to the base 1. The slot 8 and the hook 9 both have horizontal surfaces 15 that fit each other in a horizontal state. In this embodiment, the slot 8 and the hook 9 can be rotatably assembled, such as Fig.12 As shown in the rotation diagram, the upper cover 3 is first kept in an inclined state so that the hook 9 is inserted into the slot 8, and then the upper cover 3 is rotated counterclockwise until the upper cover 3 is arranged parallel to the base 1, so that the horizontal planes 15 of the slot 8 and the hook 9 are fitted together, and the two can be assembled. Moreover, the slot 8 and the hook 9 are both provided with a horizontal plane 15, which makes it easy to achieve dimensional control of parts manufacturing, dimensional control of the snap-on structure, and dimensional control of the overall thickness of the shell after assembly.

[0041] To further optimize the above solution, please refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 and Fig. 9 The end of the hook 9 facing the bottom of the slot 8 is chamfered 16. In this embodiment, the above-mentioned rotational assembly is easily achieved by designing the chamfer.

[0042] As an optimization solution of the embodiment of the utility model, please refer to Figure 7 and Figure 8 , a PCB board 2 is provided in the housing, and a fiber coiling frame 14 for fixing the optical fiber array 12 is provided on the PCB board 2. In this embodiment, the fiber coiling frame 14 is designed to facilitate fixing the optical fiber and managing the routing of the optical fiber. The fiber coiling frame 14 is fixed to the PCB board 2 by glue, and the optical fiber array 12 is also fixed to the fiber coiling frame 14 by glue. Preferably, the fiber coiling frame 14 is U-shaped to facilitate the passage of the optical fiber.

[0043] To further optimize the above solution, please refer to Figure 7 and Figure 8 , the front and back sides of the PCB board 2 are both provided with a fiber coiling frame 14. In this embodiment, the fiber coiling frame 14 is provided on both the front and back sides of the PCB board 2, so that the optical fibers on the front and back sides of the PCB board 2 can be bound.

[0044] As an optimization solution of the embodiment of the utility model, please refer to Fig.10 and Fig.11 , the optical module also includes an optical fiber array 12, the optical fiber array 12 includes a V-groove and a cover plate, the V-groove and the cover plate are both provided with a groove body, and the position of the optical fiber fusion splicing of the optical fiber array 12 is set in the groove body. In this embodiment, MT-FA uses MFD optical fiber. To increase the coupling efficiency between the optical fiber array 12 and the silicon photonic chip, since fusion splicing will cause the size of the optical fiber to change at the fusion splicing point, a square groove 13 is opened in the V-groove and the cover plate of the optical fiber array 12 respectively, and the fusion splicing position is placed in this groove when the optical fiber is assembled, such as Fig.10 and Fig.11 As shown, the square groove 13 is close to the left side of the lower cover plate, so that there is enough spacing to ensure that the spacing tolerance of the loose fibers is not affected by the diameter change caused by the fusion fiber. In addition, the diameter change of the fiber core caused by the fusion can be accommodated, thereby avoiding the size change between the fiber cores caused by the diameter change, and improving the production yield of the MFD optical fiber.

[0045] As an optimization solution of the embodiment of the utility model, please refer to Figure 2 and Figure 3, a positioning column 4 for positioning the PCB board 2 is provided in the inner cavity of the base 1, and the positioning column 4 is located in the middle of the PCB board 2. A boss 5 that can abut the side of the PCB board 2 is provided at the end of the base 1 close to the electrical port b. Preferably, a driver chip 6 and a transimpedance amplifier chip 7 are provided on the PCB board 2, and the driver chip 6 and the transimpedance amplifier chip 7 are both provided at the PCB board 2 close to the electrical port b. In this embodiment, by arranging the positioning column 4 of the PCB board 2 in the middle of the PCB board 2, and then ensuring the centering of the PCB board 2 through the boss 5 on the side of the base 1 at the electrical port b, the positioning column 4 of the PCB board 2 at the electrical port b is omitted, and space for the driver chip 6 and the transimpedance amplifier chip 7 to be placed at the electrical port b is freed up, so that the driver chip 6 and the transimpedance amplifier chip 7 can be as close as possible to the electrical port b, and the high-speed routing of the driver chip 6 and the transimpedance amplifier chip 7 can be as short as possible under the premise of complying with the protocol. In the prior art, positioning posts 4 are usually designed at the front and rear of the PCB board 2 to ensure that the PCB board 2 is centered. However, this will greatly affect the space at the electrical port b of the PCB board 2. The present application cleverly eliminates the positioning post 4 at the rear and sets it in the middle of the PCB board 2, so that the rear space can be vacated. Fig.13 As shown, the driver chip 6 and the transimpedance amplifier chip 7 can be moved to the electrical port b as far as possible, so that the high-speed line routing of the two can be as short as possible in the module while complying with the protocol.

[0046] As an optimization solution of the embodiment of the utility model, please refer to Figure 5 The boss 5 is provided on the inner side wall of the base 1, and the boss 5 is provided on one opposite inner side wall of the base 1, and the protruding dimensions of the two bosses 5 are the same. In this embodiment, in order to ensure that the PCB board 2 is centered, the bosses 5 on both sides can be designed, and the PCB board 2 can be ensured to be centered by controlling the protruding lengths of the two.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An AOC optical module, comprising a PCB board and a base for mounting the PCB board, characterized in that: A positioning column for positioning the PCB is provided in the inner cavity of the base, the positioning column is located in the middle of the PCB, and a boss that can abut against the side of the PCB is provided at the end of the base close to the electrical port.

2. The AOC optical module according to claim 1, characterized in that: The boss is arranged on the inner side wall of the base, and the boss is arranged on one opposite inner side wall of the base, and the protruding sizes of the two bosses are consistent.

3. The AOC optical module according to claim 1, wherein: A driving chip and a transimpedance amplifier chip are arranged on the PCB board, and both the driving chip and the transimpedance amplifier chip are arranged on the PCB board near the electrical port.

4. The AOC optical module according to claim 1, wherein: It also includes an upper cover, and the base is clamped with the upper cover at the electrical port.

5. The AOC optical module according to claim 4, characterized in that: A card slot is provided at one end of the base close to the electrical port, and a card hook is provided at one end of the upper cover close to the electrical port, and the card hook is inserted into the card slot.

6. The AOC optical module according to claim 5, characterized in that: The hook extends toward the optical port.

7. The AOC optical module according to claim 5, characterized in that: The distance between the hook and the bottom surface of the base is greater than 6.3 mm.

8. The AOC optical module according to claim 4, characterized in that: It also includes an AOC optical cable. The upper cover and the base are combined to form a shell with an inner cavity. The side of the shell facing the optical port is provided with an opening for the AOC optical cable to extend into.

9. The AOC optical module according to claim 8, characterized in that: The AOC optical cable is fixed by screws.

10. The AOC optical module according to claim 9, characterized in that: The screw is screwed into the base from the side of the base, and the head of the screw abuts against the AOC optical cable.

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