A four-channel optical isolator and an 800G 2×FR4 silicon photonics module

Abstract

The utility model relates to a four -channel optical isolator, include: substrate, the upper surface of substrate is fixed with one magnetic block in its length direction's both sides, two magnetic blocks parallel distribution, each magnetic block is fixed with one glass block on two side surfaces along the length direction of substrate, each glass block is used to with the side surface of magnetic block fixed and the side surface of magnetic block used to fix the glass block parallel, each glass block and magnetic block adjacent two side surfaces are respectively the light -in surface and the light -out surface, the light -in surface and the light -out surface of each glass block are respectively 7 DEG plus or minus 1 DEG, a kind of 800G 2xFR4 silicon optical module, including: four -channel optical isolator. Advantageous effects are: can ensure the light -in surface and the light -out surface of each glass block are respectively 7 DEG plus or minus 1 DEG, reduce angle error, thereby reduce optical path deviation error, to avoid the reduction of coupling efficiency due to error, improve yield, can ensure the reliability of fixed, compared with prior art cancel the magnetic block in the middle, effectively reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of optical module technology, specifically to a four-channel optical isolator and an 800G 2×FR4 silicon photonic module. Background Technology

[0002] For an 800G 2×FR4 silicon photonics module, a four-channel optical isolator is typically used. This four-channel optical isolator consists of a substrate, four glass blocks, and three magnetic blocks. The substrate is made of ceramic. Four glass blocks (corresponding to the four channels) are arranged in a row on the upper surface of the substrate. A magnetic block, fixed to the substrate, is placed in the gap between each adjacent glass block, resulting in three magnetic blocks. The light-incident and light-exit surfaces of the glass blocks are generally designed to be tilted at 7°±1°. Due to cutting tolerances in the glass and gaps between the glass blocks and the magnetic blocks, the tilt angles of the light-incident and light-exit surfaces of the glass blocks after assembly are incorrect, resulting in a tilt of 7°±2°. Specifically... Figure 1 As shown, the tilt angles of the light-incident and light-exit surfaces of some glass blocks become 9°, the tilt angles of the light-incident and light-exit surfaces of some glass blocks become 5°, and the tilt angles of the light-incident and light-exit surfaces of some glass blocks become 7°. The original 7° tilt angle of the light-incident and light-exit surfaces of the glass blocks would cause the optical path to shift. If the angle error is large, the error in the amount of optical path shift will increase, thereby reducing the coupling efficiency. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a four-channel optical isolator and an 800G 2×FR4 silicon photonics 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: A four-channel optical isolator includes: a substrate, a magnetic block fixed on each side of the substrate along its length, the two magnetic blocks being distributed in parallel, and a glass block fixed on each of the two sides of each magnetic block along the length of the substrate, the side of each glass block used to fix the magnetic block being parallel to the side of the magnetic block used to fix the glass block, the two sides of each glass block adjacent to the magnetic block being the light-incident surface and the light-exit surface, respectively, and the light-incident surface and the light-exit surface of each glass block being inclined at 7°±1°.

[0005] The beneficial effects of this invention are as follows: the glass block is directly fixed to the side of the magnetic block, rather than to the upper surface of the substrate. This allows for positioning by the magnetic block, ensuring that the light-incident and light-exit surfaces of each glass block are tilted by 7°±1° respectively, reducing angular errors and thus reducing optical path offset errors. This prevents the coupling efficiency from decreasing due to large errors and improves the yield. Since the glass block is fixed to the side of the magnetic block and there is no gap between the glass block and the magnetic block, the reliability of the fixation can be ensured. Compared with the prior art, eliminating the middle magnetic block effectively reduces costs.

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

[0007] Furthermore, each glass block is bonded to a magnetic block using adhesive.

[0008] Furthermore, the substrate is made of ceramic.

[0009] Furthermore, each magnetic block has two 0° sides along the length of the substrate, and the side of each glass block that is fixed to the magnetic block is also a 0° side.

[0010] Based on the above technical solution, this utility model also provides an 800G 2×FR4 silicon photonics module, including: the above-mentioned four-channel optical isolator.

[0011] The further beneficial effects of adopting the above are: it can reduce the optical path offset error, so as to avoid the coupling efficiency being reduced due to the large error and improve the yield. Attached Figure Description

[0012] Figure 1 This is a structural diagram of a four-channel optical isolator in the prior art; Figure 2 This is a structural diagram of the four-channel optical isolator in this utility model.

[0013] The attached diagram lists the components represented by each number as follows: 1. Substrate, 2. Magnetic block, 3. Glass block, 310. Light-incident surface, 320. Light-exiting surface. Detailed Implementation

[0014] 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.

[0015] Example 1 like Figure 2As shown, a four-channel optical isolator includes: a substrate 1, with a magnetic block 2 fixed on each side of the upper surface of the substrate 1 along its length, i.e., only two magnetic blocks 2 on the upper surface of the substrate 1, saving one intermediate magnetic block 2 compared to the prior art. The two magnetic blocks 2 are distributed in parallel, and a glass block 3 is fixed on each of the two sides of each magnetic block 2 along the length of the substrate 1, i.e., a total of four glass blocks 3. The four glass blocks 3 correspond to different wavelengths, for example, 1330nm, 1310nm, 1290nm, and 1270nm respectively. Of course, this is just an exemplary example, and further details will be provided later regarding the optical glass. In block 3, the side of each glass block 3 used to fix with the magnetic block 2 is parallel to the side of the magnetic block 2 used to fix the glass block 3. This sentence can be understood as follows: assuming that the side of each glass block 3 used to fix with the magnetic block 2 is the first side, and the side of the magnetic block 2 used to fix the glass block 3 is the second side, then the first side and the second side are parallel. The two sides of each glass block 3 adjacent to the magnetic block 2 are the light-incident surface 310 and the light-exit surface 320, respectively. The inclination angle of the light-incident surface 310 of each glass block 3 is θ, and the inclination angle of the light-exit surface 320 of each glass block 3 is θ, where θ takes the value of 7°±1°.

[0016] The glass block 3 is fixed directly to the side of the magnetic block 2, rather than to the upper surface of the substrate 1. This allows the magnetic block 2 to be used for positioning, ensuring that the light-incident and light-exit surfaces of each glass block 3 are tilted by 7°±1° respectively, reducing angular errors and thus reducing optical path offset errors. This prevents the coupling efficiency from decreasing due to large errors and improves the yield. Since the glass block 3 is fixed to the side of the magnetic block 2 and there is no gap between the glass block 3 and the magnetic block 2, the reliability of the fixation can be ensured.

[0017] Example 2 like Figure 2 As shown, this embodiment is a further improvement on embodiment 1, as detailed below: Each glass block 3 is bonded to the magnetic block 2 with glue. Since there is no gap between the glass block 3 and the magnetic block 2, the reliability of the glue bonding is improved. If there is a gap, the asymmetrical gap will easily cause the glue to expand due to heat or moisture absorption, which will affect the reliability.

[0018] Furthermore, the substrate 1 is preferably made of ceramic, which is consistent with the existing technology.

[0019] Example 3 like Figure 2 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below: Each magnetic block 2 has two 0° sides along the length of the substrate 1. That is, the side of each magnetic block 2 used to fix the glass block 3 is a 0° side, and the side of each glass block 3 fixed to the magnetic block 2 is a 0° side. If the horizontal direction is defined as 0° and the vertical direction as 90°, then it can be understood that: each magnetic block 2 has two 90° sides along the length of the substrate 1. That is, the side of each magnetic block 2 used to fix the glass block 3 is a 90° side.

[0020] Example 4 An 800G 2×FR4 silicon photonics module includes: a four-channel optical isolator as described in any of Examples 1 to 3.

[0021] 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 four-channel optical isolator, characterized in that, include: A substrate (1) has a magnetic block (2) fixed on each side of its length direction on the upper surface of the substrate (1). The two magnetic blocks (2) are distributed in parallel. Each magnetic block (2) has a glass block (3) fixed on each of the two sides along the length direction of the substrate (1). The side of each glass block (3) used to fix the magnetic block (2) is parallel to the side of the magnetic block (2) used to fix the glass block (3). The two sides of each glass block (3) adjacent to the magnetic block (2) are the light-incident surface (310) and the light-exit surface (320), respectively. The light-incident surface (310) and the light-exit surface (320) of each glass block (3) are inclined at 7°±1°.

2. A four-channel optical isolator according to claim 1, characterized in that, Each glass block (3) is glued to the magnetic block (2).

3. A four-channel optical isolator according to claim 1, characterized in that, The substrate (1) is made of ceramic.

4. A four-channel optical isolator according to claim 1, 2, or 3, characterized in that, Each magnetic block (2) has two 0° sides along the length of the substrate (1), and each glass block (3) has a 0° side that is fixed to the magnetic block (2).

5. An 800G 2×FR4 silicon photonics module, characterized in that, include: The four-channel optical isolator as described in any one of claims 1 to 4.

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