A positioning fixture for assembling optical isolators in 800G 2×FR4 silicon photonics modules

Abstract

This utility model relates to a positioning fixture for assembling optical isolators in an 800G 2×FR4 silicon photonics module. Four positioning blocks arranged in a row are provided on the same side of the substrate. The surface of each positioning block away from the substrate is inclined at an angle of 7°±0.5°. The gap between two adjacent positioning blocks forms a clearance groove to avoid magnetic blocks in the optical isolator. The inclined surfaces of the four positioning blocks simultaneously abut the inclined end faces of the four glass blocks in the optical isolator. The beneficial effect is that, during the assembly of the optical isolator, by simultaneously positioning the four glass blocks with the inclined surfaces of the four positioning blocks corresponding to each other, the inclination angles of the four glass block end faces remain consistent and within the range of 7°±0.5°, reducing angular errors and thus reducing optical path offset errors. This prevents the coupling efficiency from decreasing due to large errors, thereby improving yield and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of optical module technology, specifically to a positioning fixture for assembling optical isolators in an 800G 2×FR4 silicon optical module. Background Technology

[0002] For 800G 2×FR4 silicon photonics modules, a four-channel optical isolator is typically used. This type of optical isolator consists of a ceramic plate, glass blocks, and magnetic blocks. Four glass blocks are arranged in a row on the upper surface of the ceramic plate (the four glass blocks correspond to the subsequent four channels). A magnetic block, fixed to the ceramic plate, is placed in the gap between each adjacent glass block, resulting in three magnetic blocks. The end face of the glass blocks is generally designed to be tilted at 7°±1°. Due to cutting tolerances in the glass and the gap between the glass blocks and the magnetic blocks, the tilt angle of the glass block end face after assembly of the optical isolator will have an error, resulting in a tilt of 7°±2°. Specifically, as shown below... Figure 1 As shown, the tilt angle of some glass block end faces becomes 9°, the tilt angle of some glass block end faces becomes 5°, and the tilt angle of some glass block end faces becomes 7°. The original 7° tilt angle of the glass block end faces will cause optical path offset. If the angle error is large, the error of optical path offset will be larger, thereby reducing the coupling efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a positioning fixture for assembling optical isolators in 800G 2×FR4 silicon photonics modules, so as 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: A positioning fixture for assembling an optical isolator in an 800G 2×FR4 silicon photonics module includes: a substrate, on which four positioning blocks are arranged in a row on the same side, each positioning block having a sloped surface away from the substrate with an inclination angle of 7°±0.5°, the gap between two adjacent positioning blocks forming a clearance groove to avoid a single magnetic block in the optical isolator, and the sloped surfaces of the four positioning blocks simultaneously abutting the inclined end faces of the four glass blocks in the optical isolator.

[0005] The beneficial effects of this utility model are: when assembling the optical isolator, by having the inclined surfaces of the four positioning blocks correspond one-to-one with the inclined end faces of the four glass blocks in the optical isolator, the four glass blocks are positioned simultaneously. This ensures that the inclination angles of the end faces of the four glass blocks are consistent and within the range of 7°±0.5°, reducing angular errors and thus reducing optical path offset errors. This prevents the coupling efficiency from decreasing due to large errors, thereby improving the yield and production efficiency.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the tilt angle of the surface of each positioning block away from the substrate is 7°±0.2°.

[0008] The further beneficial effects of adopting the above are: it can further reduce the angle error, thereby reducing the optical path offset error, so as to prevent the coupling efficiency from being reduced due to the large error.

[0009] Furthermore, the hardness of the positioning block is less than that of the glass sheet at the middle end of the glass block.

[0010] The further beneficial effect of adopting the above is that there is no need to worry about damaging the glass block.

[0011] Furthermore, the positioning block is made of plastic.

[0012] Furthermore, the positioning block is made of PEI plastic.

[0013] The further beneficial effects of adopting the above are: its hardness is much less than that of glass, so it will not cause damage to the glass block, and it also has the advantage of high processing precision, thus ensuring high positioning accuracy in the subsequent process.

[0014] Furthermore, four positioning blocks on the same side of the substrate are evenly spaced.

[0015] Furthermore, the four positioning blocks on the same side of the substrate have the same structure.

[0016] Furthermore, the substrate and the positioning block are integrally formed.

[0017] The further beneficial effect of adopting the above is that it facilitates processing. Attached Figure Description

[0018] Figure 1 This is a final assembly diagram of a time isolator that does not use positioning fixtures in existing technologies. Figure 2 This is a structural diagram of the positioning fixture used for assembling the optical isolator in the 800G 2×FR4 silicon photonics module of this utility model; Figure 3 This is a final assembly diagram of the time isolator using a positioning fixture.

[0019] The attached diagram lists the components represented by each number as follows: 1. Substrate, 2. Positioning block, 3. Clearance groove, 4. Optical isolator, 410. Glass block, 420. Magnetic block, 430. Ceramic plate. Detailed Implementation

[0020] 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.

[0021] The optical isolator targeted by the positioning fixture includes a glass block 410, a magnetic block 420, and a ceramic plate 430. Four glass blocks 410 are arranged in a row on the upper surface of the ceramic plate 430. A magnetic block 420, fixed to the ceramic plate 430, is placed in the gap between each adjacent glass block 410. The number of magnetic blocks 420 is three. (Specific details are as follows...) Figure 3 As shown.

[0022] Example 1 like Figure 2 , Figure 3 As shown, a positioning fixture for assembling optical isolators in an 800G 2×FR4 silicon photonics module includes: a substrate 1, on which four positioning blocks 2 are provided on the same side, for... Figure 2 Taking the shown perspective as an example: it can be understood that four positioning blocks 2 are provided on the side of the substrate 1. The four positioning blocks 2 are subsequently used to correspond to the four glass blocks 410 of the optical isolator 4. The four positioning blocks 2 are distributed in a row on the substrate 1. The surface of each positioning block 2 away from the substrate 1 is a slope, and its tilt angle is θ, where θ is 7°±0.5°. The gap between two adjacent positioning blocks 2 forms a clearance groove 3 to avoid a single magnetic block 420 in the optical isolator 4. That is, the clearance groove 3 formed between two adjacent positioning blocks 2 is larger than the width of a single magnetic block 420, and its depth is also larger than the length of the single magnetic block 420 protruding relative to the glass block 410. Thus, it does not prevent the slope of the positioning block 2 with a tilt angle of θ from touching the tilted end face of the glass block 410. The slope of the four positioning blocks 2 with a tilt angle of θ is used to simultaneously touch the tilted end faces of the four glass blocks 410 in the optical isolator 4. That is, the distribution position of the four positioning blocks 2 corresponds to the optical isolator. The four glass blocks 410 in the isolator 4 are distributed in a one-to-one correspondence. Therefore, the positioning fixture can simultaneously position the four glass blocks 410 in the optical isolator 4. When assembling the optical isolator, by having the inclined surfaces of the four positioning blocks 2 simultaneously abut the inclined end faces of the four glass blocks 410 in the optical isolator 4, the four glass blocks 410 can be positioned simultaneously. This ensures that the inclination angles of the end faces of the four glass blocks 410 remain consistent and within the range of 7°±0.5°, reducing angular errors and thus reducing optical path offset errors. This prevents the coupling efficiency from decreasing due to large errors, thereby improving the yield and production efficiency.

[0023] Example 2 like Figure 2 As shown, this embodiment is a further improvement on embodiment 1, as detailed below: The tilt angle θ of each positioning block 2 away from the substrate 1 is 7°±0.2°, which can further reduce the angle error, thereby reducing the optical path offset error, so as to prevent the coupling efficiency from being reduced due to the large error.

[0024] Example 3 like Figure 2 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below: The hardness of the positioning block 2 is less than that of the glass sheet at the middle end of the glass block 410, so there is no need to worry about damaging the glass block 410.

[0025] Furthermore, the positioning block 2 can be made of plastic, and PEI plastic is the preferred material for positioning block 2. Its hardness is much lower than that of glass, so it will not cause damage to the glass block 410. At the same time, it has the advantage of high processing precision, which can ensure high positioning accuracy in the future. Of course, this is just an example, and other materials may be used in actual applications.

[0026] Example 4 like Figure 2 As shown, this embodiment is a further improvement on any one of embodiments 1 to 3, as detailed below: Four positioning blocks 2 on the same side of the substrate 1 are equally spaced, that is, the distance between any two adjacent positioning blocks 2 is equal, and the width of the clearance groove 3 formed between two adjacent positioning blocks 2 is the same.

[0027] Furthermore, the four positioning blocks 2 on the same side of the substrate 1 have the same structure, that is, the length, width and height are the same. In actual application, only the height is also acceptable.

[0028] Example 5 like Figure 2 As shown, this embodiment is a further improvement on any one of embodiments 1 to 4, as detailed below: The substrate 1 and the positioning block 2 are integrally formed, which is convenient for processing. It also indicates that the substrate 1 and the positioning block 2 are made of the same material. Of course, in actual application, the substrate 1 and the positioning block 2 are not integrally formed. They can be fixed by means of bonding, etc. There is no specific restriction here.

[0029] 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. A positioning fixture for assembling optical isolators in an 800G 2×FR4 silicon photonics module, characterized in that, include: The substrate (1) has four positioning blocks (2) arranged in a row on the same side. The surface of each positioning block (2) away from the substrate (1) is inclined and its inclination angle is 7°±0.5°. The gap between two adjacent positioning blocks (2) forms a clearance groove (3) to avoid a single magnetic block (420) in the optical isolator (4). The inclined surfaces of the four positioning blocks (2) are used to simultaneously and one-to-one contact with the inclined end faces of the four glass blocks (410) in the optical isolator (4).

2. A positioning fixture for assembling an optical isolator in an 800G 2×FR4 silicon photonics module according to claim 1, characterized in that, The surface tilt angle of each positioning block (2) away from the substrate (1) is 7° ± 0.2°.

3. A positioning fixture for assembling optical isolators in an 800G 2×FR4 silicon photonics module according to claim 1, characterized in that, The hardness of the positioning block (2) is less than that of the glass sheet at the middle end of the glass block (410).

4. A positioning fixture for assembling an optical isolator in an 800G 2×FR4 silicon photonics module according to claim 3, characterized in that, The positioning block (2) is made of plastic.

5. A positioning fixture for assembling an optical isolator in an 800G 2×FR4 silicon photonics module according to claim 4, characterized in that, The positioning block (2) is made of PEI plastic.

6. A positioning fixture for assembling an optical isolator in an 800G 2×FR4 silicon photonics module according to claim 1, characterized in that, The four positioning blocks (2) on the same side of the substrate (1) are equally spaced.

7. A positioning fixture for assembling an optical isolator in an 800G 2×FR4 silicon photonics module according to claim 1, characterized in that, The four positioning blocks (2) on the same side of the substrate (1) have the same structure.

8. A positioning fixture for assembling an optical isolator in an 800G 2×FR4 silicon photonics module according to any one of claims 1 to 7, characterized in that, The substrate (1) and the positioning block (2) are integrally formed.

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