A high-speed optical module receiver integration component based on a 250µm pitch wavelength division multiplexer

Abstract

This utility model discloses a high-speed optical module receiver integrated component based on a 250μm Pitch wavelength division multiplexer, including a Receptacle optical interface, an optical fiber connected to the output end of the Receptacle optical interface, a collimator connected to the output end of the optical fiber, a 250μm Pitch Z-Block wavelength division multiplexer connected to the output end of the collimator, a deflection prism connected to the output end of the deflection prism, an array lens connected to the output end of the array lens, and a PD array provided at the output end of the array lens. This invention eliminates the compression gap, reducing the gap from 750μm to 250μm. The loss per block is only about 0.15-0.25dB, and the overall component loss is about 0.4-0.6dB. It can be matched with the PD array through Z-Block, concave prism and array lens, reducing the number of optical components and assembly steps, improving assembly efficiency and yield, and making it suitable for mass production. It provides key support for 800G, 1.6T and 3.2T optical modules, and meets the needs of data centers and AI computing centers for low-loss, high-bandwidth devices.

Description

Technical Field

[0001] This utility model belongs to the field of optical device technology, specifically relating to a high-speed optical module receiver integrated component based on a 250μm pitch wavelength division multiplexer. Background Technology

[0002] With the increasing bandwidth demands of data centers, AI computing centers, and high-speed communication systems, optical modules are rapidly evolving towards 800G, 1.6T, and even 3.2T. Under this trend, the integrated optical components within optical modules must accommodate more channels within a limited space, while simultaneously ensuring low loss, low power consumption, high consistency, and thermal management capabilities.

[0003] However, traditional wavelength division multiplexing (WDM) optical path structures generally use 750μm pitch Z-blocks. When coupled with PD arrays, the large spacing requires additional optical components. The 750μm spacing requires the use of roof prisms or other optical components to reduce the distance, resulting in a complex optical path structure and high loss. The additional optical components introduce an additional insertion loss of 0.3–0.5dB, and the overall component loss often exceeds 1.5dB. At the same time, the assembly and adjustment are difficult, and the coplanar assembly of multiple components requires extremely high precision, which increases production line costs and reduces yield. Therefore, there is an urgent need for a high-speed optical module receiver integrated component based on a 250μm pitch wavelength division multiplexer to solve the above problems. Utility Model Content

[0004] In view of the problems mentioned above in the background technology, the purpose of this utility model is to provide an integrated component for a high-speed optical module receiver based on a 250μmPitch wavelength division multiplexer.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-speed optical module receiver integration component based on a 250μm Pitch wavelength division multiplexer includes a Receptacle optical interface. The output end of the Receptacle optical interface is connected to an optical fiber. The output end of the optical fiber is connected to a collimator. The output end of the collimator is connected to a 250μm Pitch Z-Block wavelength division multiplexer. The output end of the 250μm Pitch Z-Block wavelength division multiplexer is connected to a deflection prism. The output end of the deflection prism is connected to an array lens. The output end of the array lens is equipped with a PD array.

[0007] Further defining the component, it also includes a glass substrate, on which the collimator, 250μm Pitch Z-Block wavelength division multiplexer, deflection prism, and array lens are all mounted coplanarly. This structural design facilitates assembly and use.

[0008] Furthermore, the collimator, 250μm Pitch Z-Block wavelength division multiplexer, deflection prism, and array lens are bonded to the glass substrate with UV-curable epoxy resin. This structural design not only ensures a secure installation but also reduces the accumulation of installation tolerances.

[0009] Furthermore, the optical fiber and collimator are arranged coaxially. This structural design ensures that the incident beam is parallel.

[0010] Furthermore, the 250μm Pitch Z-Block wavelength division multiplexer is composed of multiple filters and prisms bonded together. This structural design can be directly matched with high-density PD arrays.

[0011] Furthermore, the filter is an optical thin-film filter, with its film system specifically optimized for a 250μm pitch. This structural design ensures optimal optical performance at a given pitch.

[0012] Furthermore, the deflecting prism and the array lens are arranged opposite each other. This structural design achieves optimal convergence and minimal crosstalk.

[0013] Furthermore, the refraction angle of the deflecting prism is 45°. This structural design can vertically redirect horizontally transmitted light signals to the array lens.

[0014] Furthermore, the final focusing position of the array lens output is precisely aligned with the PD array. This structural design facilitates the reception of optical signals and their conversion into electrical signals.

[0015] Furthermore, the array lens uses a glass or silicon substrate and is a spherical or aspherical microlens array. This structural design enables the reconvergence and collimation of four beams.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. This utility model adopts a native 250μm pitch Z-Block wavelength division multiplexer, whose output channel spacing directly matches the channel spacing of the PD array, eliminating the need for additional compression structures. This reduces the number of optical components and shrinks the overall volume by 30%-40%, meeting the design requirements of miniaturization and high-density integration for next-generation optical modules. Furthermore, the reduction in the number of components also lowers the difficulty of optical path debugging and improves assembly efficiency by over 50%.

[0018] 2. This invention significantly reduces overall loss and improves transmission efficiency. By eliminating the gap structure, the insertion loss introduced by the gap stage is avoided (the gap structure loss in traditional solutions is about 0.5-1.2dB). The overall insertion loss of the component of this invention can be controlled at 0.8-1.0dB (far lower than the 1.5-2.2dB of traditional solutions). At the same time, the Z-Block wavelength division multiplexer adopts a native spacing design, and there are no additional beam compression or expansion stages in the internal optical path, which reduces reflection loss and scattering loss, further improving the transmission efficiency of optical signals and effectively reducing the bit error rate of high-speed optical communication systems. Attached Figure Description

[0019] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0020] Figure 1 This is a schematic diagram of the axial side structure of an integrated high-speed optical module receiver based on a 250μm Pitch wavelength division multiplexer according to an embodiment of the present invention.

[0021] Figure 2 This is a cross-sectional structural schematic diagram of an integrated component for a high-speed optical module receiver based on a 250μm Pitch wavelength division multiplexer, according to an embodiment of this utility model.

[0022] The symbols for the main components are explained below:

[0023] Receptacle optical interface 1, optical fiber 2, collimator 3, glass substrate 4, 250μm Pitch Z-Block wavelength division multiplexer 5, folding prism 6, array lens 7. Detailed Implementation

[0024] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1, such as Figure 1 and Figure 2 As shown, a high-speed optical module receiver integrated component based on a 250μm Pitch wavelength division multiplexer is provided. The output end of the Receptacle optical interface 1 is connected to an optical fiber 2. The output end of the optical fiber 2 is connected to a collimator 3. The output end of the collimator 3 is connected to a 250μm Pitch Z-Block wavelength division multiplexer 5. The output end of the 250μm Pitch Z-Block wavelength division multiplexer 5 is connected to a deflection prism 6. The output end of the deflection prism 6 is connected to an array lens 7. The output end of the array lens 7 is provided with a PD array.

[0026] In this embodiment, the Receptacle optical interface 1 is used to receive multi-wavelength optical signals transmitted from an external optical communication system. The multi-wavelength signals are coupled into the collimator 3 through the optical fiber 2 and converted into parallel light. Then, the 250μm Pitch Z-Block wavelength division multiplexer 5 performs wavelength division multiplexing / demultiplexing to split one optical signal into four, or combine four into one, and outputs it to the deflection prism 6. The deflection prism 6 deflects the four beams by 90°, changing the direction of the optical path to adapt to the internal spatial layout of the module. Then, the beams enter the array lens 7, which re-converges / collimates the four beams, focusing them at the focal point. The PD array column at the focal point receives the optical signal and converts it into an electrical signal.

[0027] The output end of Receptacle optical interface 1 is connected to one end of optical fiber 2 via fusion welding or precision plugging, and the connection is fitted with a protective sleeve to prevent loosening, ensuring stable transmission of optical signals. Optical fiber 2 uses single-mode or multi-mode fiber (selected according to the transmission rate and distance requirements of the optical module), and its length is adapted to the spatial layout. The other end of optical fiber 2 is detachably connected to the input end of collimator 3 via an optical fiber adapter, while ensuring that the coaxiality error of the optical path between optical fiber 2 and collimator 3 does not exceed 0.01mm. The input end of collimator 3 is connected to optical fiber 2 to convert the divergent optical signal transmitted by optical fiber 2 into a parallel optical signal. The output optical path of collimator 3 is aligned with the input end of 250μm Pitch Z-Block wavelength division multiplexer 5. 50μm Pitch Z-Block wavelength division multiplexer 5 is the world's first wavelength division multiplexer with a native 250μm channel pitch. The input of the Z-Block wavelength division multiplexer 5 receives the multi-wavelength parallel optical signal transmitted by the collimator 3 and splits one optical signal into four, or combines four into one. The output optical path of the 250μm Pitch Z-Block wavelength division multiplexer 5 is aligned with the incident surface of the deflection prism 6. The deflection prism 6 is a right-angle prism with a deflection angle of 90°. The angle between the incident surface of the deflection prism 6 and the optical path of the output of the 250μm Pitch Z-Block wavelength division multiplexer 5 is 45°, ensuring that the four optical signals can be perpendicularly incident on the incident surface of the deflection prism. The deflection prism 6 is used to split the 250μm Pitch Z-Block wavelength division multiplexer 5 into four, or combine four into one. The four horizontal optical signals output by the Z-Block wavelength division multiplexer 5 are deflected by 90° and converted into vertical beams to fit the installation position of the PD array. The output surface of the deflecting prism 6 is aligned with the input end of the array lens 7. The array lens 7 is used to re-converge and collimate the four optical signals after deflection by the deflecting prism 6, so that each beam is focused at the focal point of the same focal plane. The photosensitive surface of the PD array coincides with the focal point of the array lens 7, which is used to receive the optical signals and convert them into electrical signals. Then, the signal processing circuit of the optical module receiver is connected through the PD array to realize the subsequent transmission and processing of the electrical signals.

[0028] Example 2, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure to the embodiment 1, and also includes a glass substrate 4. The collimator 3, the 250μm Pitch Z-Block wavelength division multiplexer 5, the deflection prism 6 and the array lens 7 are all coplanarly mounted on the glass substrate 4.

[0029] In this embodiment, the rigid support of the glass substrate 4 ensures that the relative positional accuracy between the collimator 3, the 250μm Pitch Z-Block wavelength division multiplexer 5, the prism 6, and the array lens 7 is controlled at the micrometer level. Coplanar mounting can accurately match the optical requirements of their narrow-pitch channels, avoid signal crosstalk and attenuation caused by positional deviations, significantly improve the signal transmission efficiency and stability of the wavelength division multiplexing system, and provide reliable protection for multi-channel signal transmission in high-density optical communication scenarios. At the same time, the excellent physical stability of the glass substrate 4 can effectively suppress component positional shifts and optical path distortion caused by temperature changes.

[0030] Example 3: Based on Example 1, this example adds the following structure: UV-curable epoxy resin is provided at the connection between the collimator 3, the 250μm PitchZ-Block wavelength division multiplexer 5, the deflection prism 6, and the array lens 7 and the glass substrate 4.

[0031] In this embodiment, the UV-curable epoxy adhesive possesses excellent bonding strength and mechanical stability, enabling it to tightly adhere to the connection surface between the optical components and the glass substrate. This effectively resists stress impacts caused by environmental vibrations and temperature fluctuations during long-term use. Furthermore, the UV-curable epoxy adhesive typically exhibits good temperature resistance, moisture resistance, and chemical corrosion resistance, allowing the collimator 3, the 250μm Pitch Z-Block wavelength division multiplexer 5, the deflection prism 6, and the array lens 7 to maintain stable performance in complex environments (such as high-temperature and high-humidity outdoor communication cabinets or industrial scenarios with slight chemical corrosion).

[0032] Example 4, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure to the embodiment 1: the optical fiber 2 and the collimator 3 are arranged in a coaxial structure.

[0033] In this embodiment, by adjusting the concentricity of fiber 2 and collimator 3, the coaxiality error of the optical path between fiber 2 and collimator 3 is ensured to be no more than 0.01 mm, thus ensuring that the incident beam is parallel.

[0034] Example 5: Based on Example 1, this example adds the following structure: the 250μm Pitch Z-Block wavelength division multiplexer 5 is made of multiple filters and prisms bonded together.

[0035] In this embodiment, multiple filters and prisms are integrated into a single adhesive bonding design, eliminating the need for additional mechanical fixing components. This achieves narrow-pitch wavelength arrangement while significantly reducing the overall size of the device, perfectly meeting the current miniaturization requirements of high-density optical modules in the optical communication field. The adhesive bonding structure forms a rigid connection between the filters and prisms, avoiding filter displacement or optical path offset problems caused by vibration and temperature changes in traditional assembled structures. The optical refractive properties of the prism provide an optimized optical path angle for the filters, reducing reflection and scattering losses of the optical signal at the interface. The overall insertion loss can be controlled below 0.5dB, improving the overall efficiency of the optical transmission link.

[0036] Among them, Z-Block is a prism and a thin film filter. The 250μm Pitch Z-Block of this application can be directly matched with a high-density PD array.

[0037] The application contains four filters, making it a four-channel application. The film system of the optical thin film filter is specifically optimized for a 250μm pitch to ensure low insertion loss and high isolation. The angles between the prism and the thin film filter have been redesigned and are not linearly scaled to 750μm.

[0038] Example 6: This example adds the following structure to Example 5: the filter is an optical thin film filter, and its film system is specifically optimized for a 250μm pitch.

[0039] In this embodiment, the coating design of the filter is specially adjusted for a 250-micron pixel pitch to ensure precise control of light transmission or reflection even with a tiny pixel arrangement, thus avoiding interference with imaging or signal detection.

[0040] Example 7, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure to the embodiment 1: the turning prism 6 and the array lens 7 are arranged opposite to each other.

[0041] In this embodiment, during use, the relative positions of the deflection prism 6 and the array lens 7 can be adjusted to achieve optimal convergence and minimal crosstalk.

[0042] Example 8: This example adds the following structure to Example 1: the refraction angle of the prism 6 is 45°.

[0043] In this embodiment, during use, the horizontally transmitted light signal can be vertically redirected to the array lens 7 by the 45° refraction angle of the deflection prism 6.

[0044] Example 9: Based on Example 1, this example adds the following structure: the final focusing position of the output end of the array lens 7 is precisely aligned with the PD array.

[0045] In this embodiment, the four beams are re-converged and collimated by the array lens 7, so that they are focused at the focal point. The PD array column at the focal point receives the optical signal and converts it into an electrical signal.

[0046] Example 10: This example adds the following structure to Example 1: the array lens 7 uses a glass or silicon substrate and is a spherical or aspherical microlens array. This structural design enables the reconvergence and collimation of four beams.

[0047] In this embodiment, the array lens 7 uses a glass or silicon substrate and is a spherical or aspherical microlens array, which can realize the re-convergence and collimation of four beams.

[0048] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A high-speed optical module receiver integrated component based on a 250μm pitch wavelength division multiplexer, characterized in that: The device includes a Receptacle optical interface (1), the output of which is connected to an optical fiber (2), the output of which is connected to a collimator (3), the output of which is connected to a 250μm Pitch Z-Block wavelength division multiplexer (5), the output of which is connected to a prism (6), the output of which is connected to an array lens (7), and the output of which is equipped with a PD array.

2. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 1, characterized in that: It also includes a glass substrate (4), wherein the collimator (3), the 250μm Pitch Z-Block wavelength division multiplexer (5), the prism (6) and the array lens (7) are all mounted coplanarly on the glass substrate (4).

3. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 2, characterized in that: The collimator (3), 250μm Pitch Z-Block wavelength division multiplexer (5), prism (6), and array lens (7) are connected to the glass substrate (4) with UV-curable epoxy resin.

4. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 3, characterized in that: The optical fiber (2) and the collimator (3) are arranged in a coaxial structure.

5. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 4, characterized in that: The 250μm Pitch Z-Block wavelength division multiplexer (5) is made of multiple filters and prisms bonded together.

6. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 5, characterized in that: The filter is an optical thin-film filter, and its film system is specifically optimized for a 250μm pitch.

7. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 6, characterized in that: The prism (6) and the array lens (7) are arranged opposite to each other.

8. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 7, characterized in that: The refraction angle of the prism (6) is 45°.

9. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 8, characterized in that: The final focusing position of the output end of the array lens (7) is precisely aligned with the PD array.

10. The high-speed optical module receiver integration component based on a 250μm pitch wavelength division multiplexer according to claim 9, characterized in that: The array lens (7) uses a glass or silicon substrate and is a spherical or aspherical microlens array.

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