An 800G SR8 optical module

Abstract

The utility model relates to an 800G SR8 optical module, include: PCB board, lens and conjoined plug core, two lenses that correspond to the position fixed along its width direction and are distributed side by side on the PCB board, conjoined plug core is fixed with two lenses respectively, two outer sides of conjoined plug core are respectively inducted in the PCB board, a plurality of optical fiber holes are opened in conjoined plug core at corresponding each lens place, and the optical fiber that is coupled with corresponding lens is respectively inserted in each optical fiber hole. Advantageous effects are: even if let two lenses distribute side by side, two outer sides of conjoined plug core can not exceed the PCB board edge, so that let conjoined plug core not interfere with the shell, since two lenses distribute side by side, so the layout mode also does not affect RF line and optical fiber length, can let conjoined plug core be fixed with two lenses simultaneously first, then let two lenses be coupled with optical chip simultaneously, can reduce coupling times, reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of optical module technology, specifically to an 800G SR8 optical module. Background Technology

[0002] The traditional 800G SR8 optical module QSFP-DD package has the following problems: Due to the limited package size, the maximum width of the PCB board is designed to be 14mm, while the standard MT ferrule (with 8 channels) is 7mm wide. The 800G SR8 optical module has two lenses + two MT ferrules, and there are two common placement methods: 1) Two identical lenses are placed side-by-side on the same side of the PCB board along its width. Two MT inserts are then placed side-by-side and coupled to the two lenses respectively. During coupling, there should be sufficient clearance between the two MT inserts, greater than 0.2mm. Since 7mm×2+0.2mm>14mm, interference will occur between the two MT inserts, or the sides of the two MT inserts may extend beyond the edge of the PCB board, thus interfering with the outer casing. Specifically, as shown... Figure 1 , Figure 2 As shown; 2) The two lenses are placed in a staggered manner, and the two MT ferrules are coupled to the two lenses respectively. Then, the area covered by each lens has optical chips and electrical chips. This method will result in the RF line becoming longer and the electrical performance being severely degraded. At the same time, the fiber length on the MT ferrule will become shorter, resulting in high bending stress and unstable optical path. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an 800G SR8 optical module to overcome the shortcomings of the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An 800G SR8 optical module includes a PCB board, lenses, and an integrated ferrule. Two lenses are fixed at corresponding positions on the PCB board and arranged side by side along its width. The integrated ferrule is fixed to the two lenses respectively. The two outer sides of the integrated ferrule are recessed into the PCB board. Multiple fiber optic holes are opened through the integrated ferrule at each lens position, and an optical fiber coupled to the corresponding lens is inserted into each fiber optic hole.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, the integrated ferrule has eight fiber optic holes perforated at each lens location, and the eight fiber optic holes corresponding to each lens are divided into two groups of four, with the four fiber optic holes in each group being equally spaced.

[0007] Furthermore, the integrated insert is fixed to the two lenses by a plug-in connection.

[0008] Furthermore, the smooth end of the integrated ferrule has a first guide pin hole, a second guide pin hole, a third guide pin hole, and a fourth guide pin hole at the same height. Each lens has two guide pins. The two guide pins on one of the lenses are inserted into the first guide pin hole and the second guide pin hole, respectively, while the two guide pins on the other lens are inserted into the third guide pin hole and the fourth guide pin hole, respectively.

[0009] Furthermore, the integrated ferrule has eight fiber optic holes between the first and second guide pin holes and between the third and fourth guide pin holes.

[0010] Furthermore, each lens has two optical chips and two electrical chips arranged inside its chip cavity. The optical chips are fixed on the PCB board, and each electrical chip is electrically connected to one optical chip and the PCB board, respectively.

[0011] Furthermore, of the four optical chips, two are four-channel VCSEL chips and the other two are four-channel PD chips. Of the four electrical chips, two are drive chips and the other two are TIA chips. The TIA chips are electrically connected to the four-channel PD chips, and the drive chips are electrically connected to the four-channel VCSEL chips.

[0012] The beneficial effects of this utility model are: By merging two MT ferrules into a single integrated ferrule, the need for pre-reserved coupling gaps is eliminated. The integrated ferrule can be simultaneously coupled and fixed to both lenses, and its two outer surfaces are recessed within the PCB board. This means that even if the two lenses are arranged side by side, the two outer surfaces of the integrated ferrule do not need to extend beyond the edge of the PCB board, thus preventing interference between the integrated ferrule and the outer casing. Since the two lenses are arranged side by side, this layout does not affect the RF line or fiber length. When producing 800G SR8 optical modules, the integrated ferrule can be coupled and fixed to both lenses simultaneously first, and then the two lenses can be coupled to the optical chip simultaneously, reducing the number of coupling operations and lowering production costs. Attached Figure Description

[0013] Figure 1 An exploded view of an existing 800G SR8 optical module; Figure 2 This is a front view of an existing 800G SR8 optical module; Figure 3 This is a top view of the 800G SR8 optical module of this utility model; Figure 4 This is an exploded view of the 800G SR8 optical module in this utility model; Figure 5 This is a front view of the partial structure of the 800G SR8 optical module in this utility model; Figure 6 This is a side view of the integrated ferrule in this utility model.

[0014] The attached diagram lists the components represented by each number as follows: 1. PCB board, 2. Lens, 210. Guide pin, 3. Integrated ferrule, 310. First guide pin hole, 320. Second guide pin hole, 330. Third guide pin hole, 340. Fourth guide pin hole, 350. Fiber optic hole, 360. Fiber optic cable, 4. Optical chip, 5. Electrical chip. Detailed Implementation

[0015] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0016] Example 1 like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, an 800G SR8 optical module includes: a PCB board 1, lenses 2, and an integrated ferrule 3. Two lenses 2 are fixed at corresponding positions on the PCB board 1, arranged side by side along its width. The positions of the lenses 2 on the PCB board 1 remain consistent with existing technologies. The integrated ferrule 3 is fixed to the two lenses 2 respectively. The two outer sides of the integrated ferrule 3 are recessed into the PCB board 1, that is, the width of the integrated ferrule 3 is smaller than the width of the PCB board 1, and the width of the integrated ferrule 3 is less than 14mm. Multiple fiber holes 350 are opened through the integrated ferrule 3 at each corresponding position of the lens 2, and an optical fiber 360 coupled to the corresponding lens 2 is inserted into each fiber hole 350. That is, one integrated ferrule 3 is coupled to two lenses 2 at the same time.

[0017] By merging two MT ferrules into a single integrated ferrule 3, the coupling gap can be eliminated, allowing the integrated ferrule 3 to be simultaneously coupled and fixed to both lenses 2. Furthermore, the two outer surfaces of the integrated ferrule 3 are recessed within the PCB board 1. This means that even if the two lenses 2 are arranged side-by-side, the two outer surfaces of the integrated ferrule 3 do not need to extend beyond the edge of the PCB board 1, thus preventing interference between the integrated ferrule 3 and the outer casing. Since the two lenses 2 are arranged side-by-side, this layout does not affect the RF line or fiber length. When producing 800G SR8 optical modules, the integrated ferrule 3 can be coupled and fixed to both lenses 2 first, and then the two lenses 2 can be coupled to the optical chip 4 simultaneously, reducing the number of coupling operations and lowering production costs.

[0018] Example 2 like Figure 3 , Figure 4 , Figure 6 As shown, this embodiment is a further improvement on embodiment 1, as detailed below: The integrated ferrule 3 has eight fiber optic holes 350 through each lens 2. The eight fiber optic holes 350 corresponding to each lens 2 are divided into two groups of four. The four fiber optic holes 350 in each group are evenly spaced. This part is still consistent with the existing technology. Since the integrated ferrule 3 has a total of 16 optical fibers 360, it can realize 8-channel transmission and 8-channel reception.

[0019] Example 3 like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, this embodiment is a further improvement on embodiment 2, as detailed below: The integrated insert 3 is fixed to the two lenses 2 by a plug-in connection, which facilitates assembly.

[0020] Furthermore, the smooth end of the integrated ferrule 3 has a first guide pin hole 310, a second guide pin hole 320, a third guide pin hole 330, and a fourth guide pin hole 340. These guide pin holes 310, 320, 330, and 340 are sequentially distributed along the width direction of the integrated ferrule 3 (i.e., the width direction of the PCB board 1), and are at the same height. Each lens 2 has two guide pins 210, and one of the two lenses 2 has... Two guide pins 210 are inserted into the first guide pin hole 310 and the second guide pin hole 320 respectively. Two guide pins 210 on the other lens 2 are inserted into the third guide pin hole 330 and the fourth guide pin hole 340 respectively. By inserting the guide pins 210 on the lens 2 into the guide pin holes on the integrated ferrule 3, the integrated ferrule 3 is fixed to the two lenses 2 by insertion. The insertion and fixing method is still consistent with the existing technology. During coupling, after the guide pins 210 on the lens 2 are inserted into the guide pin holes on the integrated ferrule 3, glue can be applied to further fix the two.

[0021] The integrated ferrule 3 has eight fiber optic holes 350 between the first guide pin hole 310 and the second guide pin hole 320, and the integrated ferrule 3 has eight fiber optic holes 350 between the third guide pin hole 330 and the fourth guide pin hole 340.

[0022] Example 4 like Figure 3 , Figure 4 , Figure 5 As shown, this embodiment is a further improvement on embodiment 3, as detailed below: Each lens 2 has two optical chips 4 and two electrical chips 5 arranged in its chip cavity. The optical chips 4 are fixed on the PCB board 1, and each electrical chip 5 in the chip cavity of each lens 2 is electrically connected to one optical chip 4. The electrical chip 5 is electrically connected to the PCB board 1. This part is still consistent with the existing technology.

[0023] Furthermore, two of the four optical chips 4 are four-channel VCSEL chips, and the other two are four-channel PD chips; two of the four electrical chips 5 are Drive chips, and the other two are TIA chips. The TIA chips are electrically connected to the four-channel PD chips, and the Drive chips are electrically connected to the four-channel VCSEL chips, thus enabling 8-channel transmission and 8-channel reception, which remains consistent with existing technology.

[0024] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An 800G SR8 optical module, characterized in that, include: The PCB board (1), lens (2) and integrated ferrule (3) are provided. Two lenses (2) are fixed at corresponding positions on the PCB board (1) and arranged side by side along its width direction. The integrated ferrule (3) is fixed to the two lenses (2) respectively. The two outer sides of the integrated ferrule (3) are recessed into the PCB board (1) respectively. Multiple fiber optic holes (350) are opened through the integrated ferrule (3) at each corresponding lens (2), and an optical fiber (360) coupled to the corresponding lens (2) is inserted into each fiber optic hole (350).

2. The 800G SR8 optical module according to claim 1, characterized in that, The integrated ferrule (3) has eight fiber optic holes (350) through it at each lens (2), and the eight fiber optic holes (350) corresponding to each lens (2) are divided into two groups of four, with the four fiber optic holes (350) in each group being evenly spaced.

3. An 800G SR8 optical module according to claim 2, characterized in that, The integrated insert (3) is fixed to the two lenses (2) by insertion.

4. An 800G SR8 optical module according to claim 3, characterized in that, The smooth end of the integrated ferrule (3) has a first guide pin hole (310), a second guide pin hole (320), a third guide pin hole (330) and a fourth guide pin hole (340) at the same height. Each lens (2) has two guide pins (210). The two guide pins (210) on one of the two lenses (2) are inserted into the first guide pin hole (310) and the second guide pin hole (320) respectively, and the two guide pins (210) on the other lens (2) are inserted into the third guide pin hole (330) and the fourth guide pin hole (340) respectively.

5. An 800G SR8 optical module according to claim 4, characterized in that, The integrated ferrule (3) has eight fiber optic holes (350) between the first guide pin hole (310) and the second guide pin hole (320) and between the third guide pin hole (330) and the fourth guide pin hole (340).

6. An 800G SR8 optical module according to any one of claims 1 to 5, characterized in that, Two optical chips (4) and two electrical chips (5) are evenly arranged in the chip cavity of each lens (2). The optical chips (4) are fixed on the PCB board (1), and each electrical chip (5) is electrically connected to one optical chip (4) and the PCB board (1).

7. An 800G SR8 optical module according to claim 6, characterized in that, Of the four optical chips (4), two are four-channel Vcsel chips and the other two are four-channel PD chips. Of the four electrical chips (5), two are drive chips and the other two are TIA chips. The TIA chips are electrically connected to the four-channel PD chips and the drive chips are electrically connected to the four-channel Vcsel chips.

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