800G 2XFR4 silicon light engine
By employing silicon photonic chips and laser chips with a 0-degree distribution in the 800G 2XFR4 silicon photonic engine and utilizing the inclined design of the converging lens to deflect the optical path, the problems of poor chip mounting accuracy and slow speed in traditional silicon photonic engines are solved, achieving efficient component coupling.
Patent Information
- Application Number
- CN202520525310.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-24
AI Technical Summary
In traditional 800G 2XFR4 silicon photonics engines, the mounting accuracy of components such as laser chips and optical isolators is poor, the speed is slow, and the requirements for the coupling stage angle are high.
By employing silicon photonics chips and laser chips with a 0-degree distribution, and utilizing the inclined design of the converging lens to deflect the optical path, the angle of the outgoing optical path is the same as the tilt angle of the incoming waveguide, thus achieving 0-degree distributed coupling of the components.
It significantly improves placement speed and accuracy, reduces the angle requirements of the coupling stage, and simplifies the component placement process.
Smart Images
Figure CN223842194U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical engine technology, specifically to an 800G 2XFR4 silicon photonics engine. Background Technology
[0002] A traditional 800G 2XFR4 silicon photonics engine includes at least: one silicon photonic chip, four laser chips with different wavelengths, four converging lenses, four optical isolators, four collimating lenses, and a dual-channel fiber array. The silicon photonic chips are arranged at 0 degrees, and each chip has two output waveguides and four input waveguides on the same side. The two output waveguides and four input waveguides are parallel to each other. Each input waveguide is coupled sequentially to a converging lens, an optical isolator, a collimating lens, and a laser chip. The two output waveguides are coupled to the dual-channel fiber array, as detailed below. Figure 1 As shown, to improve optical return loss performance, the output waveguide of a silicon photonics chip is usually tilted, for example, a common tilt of 8°. To facilitate testing of silicon photonics chips, the input waveguide is also designed to be tilted. Since the two output waveguides and four input waveguides are parallel to each other, the input waveguide is also commonly tilted at 8°. This facilitates the use of a fiber array (at least a six-channel fiber array) to test the input and output optical performance. As a result, the laser chip and optical isolator can only be mounted at an angle (the tilt angle is the same as that of the input waveguide). The converging lens and collimating lens can also only be coupled at an angle (the tilt angle is the same as that of the input waveguide). This results in poor mounting accuracy, slow speed, and high requirements for the angle of the coupling stage. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide an 800G 2XFR4 silicon photonics engine 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:
[0005] An 800G 2XFR4 silicon photonics engine includes: silicon photonics chips distributed at 0 degrees and four laser chips with different wavelengths. The silicon photonics chips have four inclined and parallel input waveguides on the same side. Each laser chip is coupled to an input waveguide with a converging lens distributed at 0 degrees and having an inclined output surface. The inclined output surface of the converging lens is used to deflect the light path so that the angle of the output light path is the same as the tilt angle of the input waveguide.
[0006] The beneficial effects of this utility model are: the light-emitting surface of the converging lens is designed as an inclined surface, and the light path can be deflected by the light-emitting surface so that the angle of the light-emitting light path is the same as the tilt angle of the light-incoming waveguide. Therefore, the converging lenses can be distributed at 0 degrees, which reduces the angle requirement of the coupling stage when the converging lenses are coupled. It also allows the four laser chips to be distributed at 0 degrees, and the nozzle does not need to be rotated when the laser chips are mounted, which greatly improves the mounting speed and accuracy.
[0007] Based on the above technical solution, the present invention can be further improved as follows.
[0008] Furthermore, each laser chip is coupled to a 0-degree optical isolator between itself and the converging lens.
[0009] The further beneficial effects of the above are as follows: the emitted light emitted by each laser chip is first coupled into the optical isolator, and then coupled into the converging lens through the optical isolator. Since both the laser chip and the converging lens are 0 degrees distributed, the optical isolator can also be 0 degrees distributed, thus allowing the optical isolator to be placed at 0 degrees. The nozzle does not need to be rotated during placement, which greatly improves the placement speed and accuracy.
[0010] Furthermore, each laser chip is coupled to a collimating lens with a 0-degree distribution between itself and the optical isolator.
[0011] The further beneficial effects of the above are as follows: the emitted light emitted by each laser chip is first coupled into the collimating lens, then coupled into the optical isolator through the collimating lens, and then coupled into the converging lens through the optical isolator. Since the laser chip, the converging lens, and the optical isolator are all 0 degrees distributed, the collimating lens can also be 0 degrees distributed, reducing the angle requirement of the coupling stage when the collimating lens is coupled.
[0012] Furthermore, the laser chip is mounted on a ceramic heat sink.
[0013] Furthermore, the tilt angle of the incoming waveguide is 8°, and the tilted exit surface of the converging lens is used to deflect the outgoing light path by 8°.
[0014] Furthermore, the converging lens is made of silicon with a refractive index of 3.5, and the tilt angle of the light-emitting surface of the converging lens is 86.83°.
[0015] Furthermore, the silicon photonics chip has two inclined and parallel output waveguides on the same side. The two output waveguides of the silicon photonics chip are coupled to a dual-channel fiber array, and the tilt angle of the end face of the dual-channel fiber array is the same as the tilt angle of the output waveguides.
[0016] Furthermore, the tilt angle of the output waveguide is 8°.
[0017] Furthermore, the two output waveguides and the four input waveguides are parallel to each other and located on the same side of the silicon photonics chip. Attached Figure Description
[0018] Figure 1 This is a structural diagram of an 800G 2XFR4 silicon photonics engine in the prior art;
[0019] Figure 2 This is a structural diagram of the 800G 2XFR4 silicon photonics engine in this utility model;
[0020] Figure 3 This is a partial side view of the 800G 2XFR4 silicon photonics engine of this utility model.
[0021] The attached diagram lists the components represented by each number as follows:
[0022] 1. Silicon photonics chip, 110. Input waveguide, 120. Output waveguide, 2. Laser chip, 3. Converging lens, 310. Output surface, 4. Optical isolator, 5. Collimating lens, 6. Ceramic heat sink, 7. Dual-channel fiber array. Detailed Implementation
[0023] 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.
[0024] Example 1
[0025] like Figure 2 , Figure 3 As shown, an 800G 2XFR4 silicon photonics engine includes: silicon photonic chips 1 distributed at 0 degrees, and four laser chips 2 distributed at 0 degrees, each with a different wavelength. The silicon photonic chips 1 have four input waveguides 110 on the same side, which are obliquely distributed and parallel to each other. Each laser chip 2 corresponds one-to-one with one of the four input waveguides 110. Each laser chip 2 is coupled to an input waveguide 110 with a converging lens 3 distributed at 0 degrees. The light-emitting surface 310 of the converging lens 3 is oblique. The inclined light-emitting surface 310 of the converging lens 3 is used to deflect the light path so that the angle of the light-emitting path is the same as the tilt angle of the light-inlet waveguide 110. Specifically, it can be understood that the emitted light emitted by the laser chip 2 is coupled into the converging lens 3 from the light-inlet surface and then emitted from the inclined light-emitting surface 310 of the converging lens 3. The emitted light path will be deflected relative to the original light path, and the angle of the light-emitting path will be the same as the tilt angle of the light-inlet waveguide 110. Finally, it is coupled into the light-inlet waveguide 110.
[0026] The light-emitting surface 310 of the converging lens 3 is designed as an inclined surface, and the light-emitting surface 310 can be used to deflect the light path so that the angle of the light-emitting light path is the same as the tilt angle of the light-incoming waveguide 110. Therefore, the converging lens 3 can be distributed at 0 degrees. When the converging lens 3 is coupled, the angle requirement of the coupling stage is reduced. It can also make the four laser chips 2 distributed at 0 degrees. When the laser chip 2 is placed, the nozzle does not need to be rotated, which greatly improves the placement speed and accuracy.
[0027] Example 2
[0028] like Figure 2 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:
[0029] Each laser chip 2 is coupled to a converging lens 3 with an optical isolator 4 distributed at 0 degrees. The emitted light from each laser chip 2 is first coupled into the optical isolator 4, and then coupled into the converging lens 3 through the optical isolator 4. Since both the laser chip 2 and the converging lens 3 are distributed at 0 degrees, the optical isolator 4 can also be distributed at 0 degrees, so that the optical isolator 4 can be placed at 0 degrees. The nozzle does not need to be rotated during placement, which greatly improves the placement speed and accuracy.
[0030] Example 3
[0031] like Figure 2 As shown, this embodiment is a further improvement on embodiment 2, as detailed below:
[0032] Each laser chip 2 is coupled to an optical isolator 4 with a collimating lens 5 arranged at 0 degrees. The emitted light from each laser chip 2 is first coupled into the collimating lens 5, then into the optical isolator 4, and then into the converging lens 3. Since the laser chip 2, the converging lens 3, and the optical isolator 4 are all arranged at 0 degrees, the collimating lens 5 can also be arranged at 0 degrees, which reduces the angle requirement of the coupling stage when the collimating lens 5 is coupled.
[0033] Example 4
[0034] like Figure 2 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:
[0035] The laser chip 2 is mounted on the ceramic heat sink 6.
[0036] Example 5
[0037] like Figure 2 , Figure 3 As shown, this embodiment is a further improvement on any one of embodiments 1 to 4, as detailed below:
[0038] The tilt angle of the input waveguide 110 is 8°. The tilted light-emitting surface 310 of the converging lens 3 is used to deflect the light-emitting path by 8°. Of course, this is just an example. If the tilt angle of the input waveguide 110 changes, the tilt angle of the light-emitting surface 310 of the converging lens 3 to deflect the light-emitting path will also change accordingly.
[0039] Furthermore, the converging lens 3 is made of silicon with a refractive index of 3.5. The tilt angle of the input waveguide 110 is 8°, and the tilt angle of the output surface 310 of the converging lens 3 is A. Assuming that the angle between the output light path of the converging lens 3 and the normal is B, then 90°-A+8°=B. According to the refractive index formula, it satisfies: Si n(B)×1=Si n(90°-A)×3.5, where the refractive index of air is 1, and the refractive index of the silicon material used in the converging lens 3 is 3.5. According to this formula, the value of A is 86.83°. Of course, this is just an example. When the refractive index of the material used in the converging lens 3 changes, the tilt angle of the output surface 310 of the converging lens 3 will also change.
[0040] Example 6
[0041] like Figure 2 As shown, this embodiment is a further improvement on any one of embodiments 1 to 5, as detailed below:
[0042] The silicon photonic chip 1 has two inclined and parallel output waveguides 120 on the same side. The two output waveguides 120 of the silicon photonic chip 1 are coupled to the dual-channel fiber array 7. The tilt angle of the end face of the dual-channel fiber array 7 is the same as the tilt angle of the output waveguides 120. In this embodiment, the tilt angle of the output waveguides 120 is preferably 8°. The two output waveguides 120 are parallel to the four input waveguides 110 and are located on the same side of the silicon photonic chip 1.
[0043] 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 2XFR4 silicon photonics engine, characterized in that, include: The silicon photonic chip (1) is distributed at 0 degrees and four laser chips (2) with different wavelengths. The silicon photonic chip (1) has four inclined and parallel light-inlet waveguides (110) on the same side. Each laser chip (2) is coupled to a converging lens (3) with a 0-degree distribution and an inclined light-out surface (310). The inclined light-out surface (310) of the converging lens (3) is used to deflect the light path so that the angle of the light-out path is the same as the tilt angle of the light-inlet waveguide (110).
2. The 800G 2XFR4 silicon photonics engine according to claim 1, characterized in that, Each laser chip (2) is coupled to a 0-degree optical isolator (4) between itself and the converging lens (3).
3. The 800G 2XFR4 silicon photonics engine according to claim 2, characterized in that, Each laser chip (2) is coupled to an optical isolator (4) with a collimating lens (5) distributed at 0 degrees.
4. The 800G 2XFR4 silicon photonics engine according to claim 1, characterized in that, The laser chip (2) is mounted on a ceramic heat sink (6).
5. An 800G 2XFR4 silicon photonics engine according to any one of claims 1 to 4, characterized in that, The inclination angle of the incoming waveguide (110) is 8°, and the inclined light-emitting surface (310) of the converging lens (3) is used to deflect the outgoing light path by 8°.
6. An 800G 2XFR4 silicon photonics engine according to claim 5, characterized in that, The converging lens (3) is made of silicon with a refractive index of 3.5, and the tilt angle of the light-emitting surface (310) of the converging lens (3) is 86.83°.
7. An 800G 2XFR4 silicon photonics engine according to any one of claims 1 to 4, characterized in that, The silicon photonic chip (1) has two inclined and parallel output waveguides (120) on the same side. The two output waveguides (120) of the silicon photonic chip (1) are coupled to a dual-channel fiber array (7). The tilt angle of the end face of the dual-channel fiber array (7) is the same as the tilt angle of the output waveguides (120).
8. An 800G 2XFR4 silicon photonics engine according to claim 7, characterized in that, The tilt angle of the output waveguide (120) is 8°.
9. An 800G 2XFR4 silicon photonics engine according to claim 7, characterized in that, Two output waveguides (120) and four input waveguides (110) are parallel to each other and are located on the same side of the silicon photonic chip (1).