A receiving component and optical module based on an arrayed waveguide grating

Abstract

This invention relates to a receiving component and optical module based on an arrayed waveguide grating, belonging to the field of optical communication technology. It includes a wavelength demultiplexing module and a coupling module. The wavelength demultiplexing module includes an arrayed waveguide grating, which has an input surface and an output surface. The arrayed waveguide grating is used to separate multiplexed optical signals into multiple wavelength optical signals. The coupling module is coupled to the output surface of the arrayed waveguide grating, achieving optical path turning and convergence. In this receiving component, the output surface of the arrayed waveguide grating can be ground at a smaller angle, effectively reducing the probability of damage to the arrayed waveguide grating during manufacturing, assembly, and actual use. This facilitates mass production and results in a higher yield. The coupling module improves coupling efficiency, increases the distance to the receiving chip, and enhances yield and manufacturability.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, and more specifically to a receiving component and optical module based on an arrayed waveguide grating. Background Technology

[0002] With the development of optical transmission research, multi-channel wavelength division multiplexing (WDM) technology has become an effective means to increase the capacity of communication information and is widely used in modern communication. WDM refers to the coupling of multiple wavelengths into the same waveguide or optical fiber for transmission, while demultiplexing refers to the technique of separating the total light in a waveguide or optical fiber according to wavelength. The main implementation methods at the receiving end are thin-film filter assemblies and arrayed waveguide gratings (AWGs). Among them, the arrayed waveguide grating is an ideal device for realizing WDM / demultiplexing. It can be coupled with the optoelectronic receiving array to realize the mutual conversion between optical signals and electrical signals.

[0003] With the rapid development of data centers, AI, and artificial intelligence, the demand for single-channel rates in optical modules is increasing. The contradiction between the shrinking active area of ​​optical receiver chips and the need for high sensitivity and high bit error rate requires improving the coupling efficiency and coupling tolerance of existing arrayed waveguide gratings to enhance chip utilization.

[0004] Currently, the method of optical path bend is often used to achieve vertical coupling between arrayed waveguide gratings (AWGs) and optoelectronic transceiver arrays. This usually requires grinding the output end face of the AWG at a sharp angle to form a total internal reflection of the AWG's bevel. For example, the output end face of the AWG is usually ground to a reflective surface of about 41° to achieve optical signal deflection. This makes the output waveguide fragile and very easy to be damaged during the manufacturing process, which is not easy to mass-produce and has a low yield. In addition, the existing design of the AWG emits divergent light, which has low coupling efficiency to high-speed optical receiving chips. Moreover, the distance between the AWG and the receiving chip (PD) is very close (usually about 20μm), which makes it easy to damage the receiving chip and the AWG during coupling. These problems urgently need to be solved. Summary of the Invention

[0005] The first aspect of this invention addresses the aforementioned technical problems by providing a receiving component based on an arrayed waveguide grating. This component not only effectively reduces the probability of damage to the arrayed waveguide grating during manufacturing and assembly but also increases the distance to the receiving chip, improving coupling efficiency and facilitating mass production. The main concept is as follows:

[0006] A receiving component based on an arrayed waveguide grating includes a wavelength division multiplexing (WDM) module and a coupling module. The WDM module includes an arrayed waveguide grating with an input surface and an output surface. The arrayed waveguide grating separates multiplexed optical signals into multiple wavelength optical signals. The coupling module is coupled to the output surface of the arrayed waveguide grating, achieving optical path deflection and convergence. In this scheme, by configuring an arrayed waveguide grating in the WDM module, the multiplexed optical signals are separated by wavelength, forming multiple wavelength optical signals, thus achieving wavelength division multiplexing. By directly coupling the coupling module to the output surface of the arrayed waveguide grating, and using the coupling module to achieve optical path deflection and convergence, this design effectively reduces the tilt angle of the output surface, requiring only a small grinding angle. This not only effectively reduces the probability of damage to the arrayed waveguide grating during manufacturing but also effectively reduces the risk of damage to the arrayed waveguide grating. The probability of damage to waveguide gratings during assembly and use is low, making them easy to mass-produce and resulting in a higher yield. On the other hand, the coupling module coupled to the light-emitting surface of the arrayed waveguide grating can effectively protect the light-emitting surface of the arrayed waveguide grating. This not only effectively reduces the probability of damage to the light-emitting surface of the arrayed waveguide grating during manufacturing, assembly, and use, but also allows the coupling module to converge the divergent light from the light-emitting surface of the arrayed waveguide grating and effectively increase the distance to the receiving chip, thereby improving coupling efficiency, especially for high-speed optical receiving chips.

[0007] The second aspect of this invention addresses the problem of achieving optical path deflection and convergence using a coupling module. Preferably, the coupling module includes an incident surface adapted to the light-emitting surface, a reflecting surface, and a lens array. The lens array includes multiple lenses arranged in an array, with the incident surface corresponding to the reflecting surface and the reflecting surface corresponding to the lens array. The reflecting surface is used to achieve optical path deflection, and the lenses are used to achieve optical path convergence. The incident surface of the coupling module is coupled to the light-emitting surface of the arrayed waveguide grating. In this scheme, by constructing an incident surface adapted to the light-emitting surface, not only can the incident surface of the coupling module and the light-emitting surface of the arrayed waveguide grating achieve more stable and precise coupling, but the coupling module can also effectively protect the light-emitting surface of the arrayed waveguide grating and converge the diverging light, thereby effectively increasing the distance between the arrayed waveguide grating and the receiving chip. This further reduces the probability of damage to the receiving chip and the arrayed waveguide grating during the coupling process and effectively improves the coupling efficiency between the arrayed waveguide grating and the receiving chip. By aligning the incident surface with the reflecting surface and the reflecting surface with the lens array, the light beams received by the incident surface are reflected by the reflecting surface and output to the coupling module through the lens array so as to be coupled into the receiving chip. Thus, the turning and converging functions of the optical path can be achieved through the cooperation of the incident surface, the reflecting surface, and the lens array.

[0008] Preferably, the number of lenses in the lens array is the same as the number of channels of the arrayed waveguide grating.

[0009] Preferably, the reflective surface is constructed as a total reflection surface or a reflective surface coating to achieve a better optical path deflection effect.

[0010] A third aspect of this invention addresses the problem of achieving optical path deflection and convergence using a coupling module. Preferably, the coupling module includes a reflective concave mirror array, comprising multiple reflective concave mirrors arranged in an array, with the light-emitting surface corresponding to each mirror. The reflective concave mirrors are used to achieve optical path deflection and convergence. Using reflective concave mirrors to achieve optical path deflection and convergence effectively protects the light-emitting surface of the arrayed waveguide grating and converges the diverging light, thereby effectively increasing the distance between the arrayed waveguide grating and the receiving chip. This further reduces the probability of damage to the receiving chip and the arrayed waveguide grating during coupling and effectively improves the coupling efficiency between the arrayed waveguide grating and the receiving chip.

[0011] Preferably, the coupling module further includes a mirror body adapted to the arrayed waveguide grating. One side of the mirror body has a notch, and the bottom surface of the notch has a plane arranged along the width direction of the mirror body, inclined to the vertical direction. The reflective concave mirror array is constructed within the plane. One end of the mirror body is connected to the arrayed waveguide grating, with the light-emitting surface corresponding to the reflective concave mirror array. In this solution, by constructing a notch on one side of the mirror body and connecting one end of the mirror body to the arrayed waveguide grating, the light-emitting surface of the arrayed waveguide grating is covered by the mirror body, reducing the probability of damage to the arrayed waveguide grating during coupling. This not only allows for more stable and precise coupling between the coupling module and the light-emitting surface of the arrayed waveguide grating, but also effectively protects the light-emitting surface of the arrayed waveguide grating and converges divergent light, thus improving coupling efficiency.

[0012] Furthermore, the light-emitting surface of the arrayed waveguide grating is constructed as an inclined plane in the vertical direction; the incident surface of the coupling module is also constructed as an inclined plane in the vertical direction. This not only achieves better coupling through the cooperation of the light-emitting and incident surfaces, but also helps to obtain higher return loss.

[0013] A fourth aspect of this invention addresses the problem of preventing damage to arrayed waveguide gratings. Furthermore, the light-emitting surface of the arrayed waveguide grating is tilted at an angle of 2–30 degrees relative to the vertical direction. This allows the arrayed waveguide grating to be ground at a smaller angle, thereby effectively reducing the probability of damage during the manufacturing process, assembly, and use.

[0014] Preferably, the light-emitting surface of the arrayed waveguide grating is tilted at an angle of 4 to 8 degrees relative to the vertical direction. This results in a smaller tilt angle of the light-emitting surface, which is more conducive to reducing the probability of damage during the fabrication, assembly, and use of the arrayed waveguide grating.

[0015] Preferably, the light-emitting surface of the arrayed waveguide grating is tilted at an angle of 4 degrees, 6 degrees, or 8 degrees relative to the vertical direction.

[0016] Preferably, the incident surface of the coupling module is tilted at an angle of 2 to 30 degrees relative to the vertical direction. This is to better adapt to the light-emitting surface in the arrayed waveguide grating and facilitate better coupling.

[0017] Preferably, the incident surface of the coupling module is tilted at an angle of 4 to 8 degrees relative to the vertical direction. This is to better adapt to the light-emitting surface of the arrayed waveguide grating and to improve coupling efficiency.

[0018] Preferably, the angle of inclination of the incident surface of the coupling module relative to the vertical direction is 4 degrees, 6 degrees, or 8 degrees.

[0019] Preferably, the tilt angle of the incident surface in the coupling module matches the tilt angle of the emitting surface in the arrayed waveguide grating. This facilitates better coupling between the emitting and incident surfaces and helps achieve higher return loss.

[0020] The fifth aspect of this invention addresses the problem of more reliable and higher-precision input arrayed waveguide gratings for optical signals. Further, it includes an input light module comprising an optical fiber and an optical fiber fixing assembly. The rear end of the optical fiber is fixed to the optical fiber fixing assembly, which has a mating surface adapted to the light-incident surface of the arrayed waveguide grating. The mating surface of the optical fiber fixing assembly is aligned with the light-incident surface of the arrayed waveguide grating, and the rear end of the optical fiber is coupled to the light-incident surface of the input waveguide. In this solution, the optical fiber fixing assembly is mainly used to fix the end of the optical fiber and enable better and more precise coupling between the optical fiber and the arrayed waveguide grating in the waveguide demultiplexing module, reducing optical signal loss and crosstalk during transmission. By constructing a mating surface adapted to the light-incident surface of the arrayed waveguide grating in the optical fiber fixing assembly, the reliability and accuracy of the coupling between the optical fiber and the arrayed waveguide grating are improved through the mating of the mating surface with the light-incident surface.

[0021] Furthermore, the incident surface of the arrayed waveguide grating is constructed as an inclined plane in the vertical direction; the mating surface of the fiber fixing assembly is also constructed as an inclined plane in the vertical direction. This not only achieves better coupling through the mating of the incident surface and the mating surface, but also helps to obtain higher return loss, thereby improving communication performance.

[0022] The sixth aspect of this invention addresses the problem of improving communication performance. Preferably, the incident surface of the arrayed waveguide grating is tilted at an angle of 2 to 30 degrees relative to the vertical direction. This not only allows the arrayed waveguide grating to be ground at a smaller angle, thereby effectively reducing the probability of damage during the fabrication process, but also facilitates obtaining higher return loss, thus effectively improving communication performance.

[0023] Preferably, the incident surface of the arrayed waveguide grating is tilted at an angle of 4 to 8 degrees relative to the vertical direction. This is beneficial for achieving better results.

[0024] Preferably, the mating surface of the fiber fixing assembly is tilted at an angle of 2 to 30 degrees relative to the vertical direction. This is to better fit the incident surface in the arrayed waveguide grating and facilitate better coupling.

[0025] Preferably, the mating surface of the fiber optic fixing assembly is tilted at an angle of 4 to 8 degrees relative to the vertical direction.

[0026] Preferably, the mating surface of the fiber optic fixing assembly is tilted at an angle of 4 degrees, 6 degrees, or 8 degrees relative to the vertical direction.

[0027] Preferably, the angle between the mating surface and the vertical direction in the fiber optic fixing assembly matches the angle between the incident surface and the vertical direction in the arrayed waveguide grating. This facilitates better coupling between the incident surface and the mating surface and helps achieve higher return loss, thereby improving communication performance.

[0028] Preferably, the tilt direction of the incident surface in the arrayed waveguide grating is opposite to the tilt direction of the exit surface. This is more conducive to obtaining higher return loss.

[0029] Preferably, the angle between the incident surface and the vertical direction in the arrayed waveguide grating is the same as the angle between the emitting surface and the vertical direction. This facilitates both manufacturing and assembly.

[0030] Preferably, the mating surface of the fiber optic fixing assembly is bonded to the light-incident surface of the arrayed waveguide grating using adhesive. This not only integrates the fiber optic fixing assembly with the arrayed waveguide grating but also enables more stable coupling between the mating surface of the fiber optic fixing assembly and the light-incident surface of the arrayed waveguide grating.

[0031] Preferably, the incident surface of the coupling module is bonded to the emitting surface of the arrayed waveguide grating using adhesive. This not only fixes the coupling module to the arrayed waveguide grating and integrates the coupling module with the arrayed waveguide grating, but also enables a more stable coupling between the emitting surface of the arrayed waveguide grating and the incident surface of the coupling module.

[0032] Preferably, the coupling module includes a prism adapted to an arrayed waveguide grating and a lens assembly adapted to the prism. The incident surface is constructed on one side of the prism, and the reflecting surface is constructed on the other side of the prism. The lens assembly includes a mirror body and a lens array. The lens array is disposed on one side of the mirror body, and the mirror body is fixed to one side of the prism, such that the reflecting surface corresponds to the lens array. The incident surface of the prism is coupled to the emitting surface of the arrayed waveguide grating. This allows the light beam reflected from the reflecting surface to be output through the lens array to the coupling module, achieving not only the deflection function of the optical path but also the convergence function of the optical path. By coupling the incident surface of the prism to the emitting surface of the arrayed waveguide grating, the prism effectively protects the emitting surface of the arrayed waveguide grating, and the lens array converges the diverging light, thereby effectively increasing the distance between the arrayed waveguide grating and the receiving chip. This further reduces the probability of damage to the receiving chip and the arrayed waveguide grating during coupling and effectively improves the coupling efficiency between the arrayed waveguide grating and the receiving chip.

[0033] Preferably, the coupling module includes a mirror body adapted to the arrayed waveguide grating and the lens array. The incident surface is constructed on one side of the mirror body, the reflecting surface is constructed on the other side of the mirror body, and the lens array is disposed on one side of the mirror body. The incident surface of the mirror body is coupled to the emitting surface of the arrayed waveguide grating. This allows the light beam reflected from the reflecting surface to be output through the lens array to the coupling module, achieving not only the deflection function of the optical path but also the convergence function of the optical path. By coupling the incident surface of the mirror body to the emitting surface of the arrayed waveguide grating, the emitting surface of the arrayed waveguide grating can be effectively protected by the mirror body, and the diverging light can be converged by the lens array. This effectively increases the distance between the arrayed waveguide grating and the receiving chip, further reducing the probability of damage to the receiving chip and the arrayed waveguide grating during the coupling process and effectively improving the coupling efficiency between the arrayed waveguide grating and the receiving chip.

[0034] Preferably, the coupling module is a one-piece molded component. This not only improves the precision of the coupling module, but also simplifies its structure and assembly process.

[0035] Preferably, the arrayed waveguide grating is a 4-channel arrayed waveguide grating, an 8-channel arrayed waveguide grating, a 12-channel arrayed waveguide grating, a 16-channel arrayed waveguide grating, or a 32-channel arrayed waveguide grating.

[0036] Preferably, the arrayed waveguide grating includes an input waveguide, a first planar waveguide, a waveguide array, a second planar waveguide, and an output waveguide. The end face of the input waveguide is configured as an incident light surface, and the end face of the output waveguide is configured as an exit light surface.

[0037] Preferably, the fiber fixing assembly includes a capillary tube with a channel extending through both ends. One end of the capillary tube has a flared opening, and the inner diameter of the channel is larger than the outer diameter of the bare fiber. The bare fiber is stripped from its rear end and inserted into the channel coated with adhesive. Protective adhesive is applied to the flared opening to form a coating layer. The mating surface is located on the end of the capillary tube opposite to the flared opening. In this design, inserting the bare fiber into the adhesive-coated channel stabilizes it, ensuring the fiber maintains its correct position during use and preventing displacement, shaking, or bending, thus guaranteeing stable optical signal transmission. The protective adhesive at the flared opening forms a coating layer, achieving isolation and effective protection of the bare fiber. The end of the capillary tube opposite to the flared opening is designed as a mating surface to adapt to the light-incident surface of the arrayed waveguide grating, enabling precise coupling between the fiber and the arrayed waveguide grating through coupling between the mating surface and the light-incident surface.

[0038] Preferably, the fiber fixing assembly includes a pad with a V-groove and a pressure plate that adapts to the pad. The rear end of the fiber is disposed within the V-groove, the pressure plate is fixed to the pad, and the fiber is clamped between the pressure plate and the pad. The mating surface is constructed at one end of the pad and the pressure plate. In this scheme, the V-groove provides precise positioning and support for the fiber, which not only ensures that the fiber maintains a stable position within the V-groove and achieves good optical coupling efficiency, but also facilitates better protection and fixation of the fiber. By constructing a mating surface at one end of the pad and the pressure plate that adapts to the light-incident surface of the arrayed waveguide grating, the mating surface of the fiber fixing assembly is aligned with the light-incident surface of the arrayed waveguide grating, thereby achieving optical coupling between the fiber and the arrayed waveguide grating.

[0039] Furthermore, the light input module also includes a connector, the front end of the optical fiber is connected to the connector, and the connector is used to connect to an external optical fiber.

[0040] An optical module includes the receiving component. This not only effectively reduces the probability of damage to the arrayed waveguide grating during manufacturing and assembly, but also increases the distance to the receiving chip, improving coupling efficiency and facilitating mass production.

[0041] Furthermore, it also includes a housing with an assembly space within which the receiving component is disposed. This allows the housing to effectively protect the internal receiving component, improving the stability and reliability of the optical module.

[0042] Furthermore, the assembly also includes a substrate and a receiving chip disposed within the housing. The fiber optic fixing component and / or arrayed waveguide grating in the receiving assembly are fixed to the substrate. The receiving chip is disposed below and corresponds to the coupling module, and is used to receive the optical signal output by the coupling module. In this solution, the substrate is used to support and fix the receiving assembly. By disposing the receiving chip below the coupling module and corresponding to the lens array or reflective concave mirror array in the coupling module, coupling between the receiving assembly and the receiving chip is achieved.

[0043] Compared with the prior art, the receiving component and optical module based on arrayed waveguide grating provided by the present invention can not only effectively reduce the probability of damage to the arrayed waveguide grating during the manufacturing process, assembly and actual use, but also facilitate large-scale production and achieve a higher yield rate. Furthermore, it can increase the distance to the receiving chip, which is beneficial to improving coupling efficiency. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a receiving component provided in Embodiment 1 of the present invention.

[0046] Figure 2 for Figure 1 Top view.

[0047] Figure 3 for Figure 1 A bottom view.

[0048] Figure 4 This is a schematic diagram of an arrayed waveguide grating provided in Embodiment 1 of the present invention.

[0049] Figure 5 This is a side view of a capillary tube provided in Embodiment 1 of the present invention.

[0050] Figure 6 This is a partial cross-sectional view of the optical fiber fixing component in a receiving component provided in Embodiment 1 of the present invention. The optical fiber fixing component in the figure is a capillary tube.

[0051] Figure 7 This is a top view of an optical fiber fixing assembly provided in Embodiment 1 of the present invention.

[0052] Figure 8This is a partial cross-sectional view of the optical fiber fixing component in a receiving component provided in Embodiment 1 of the present invention. The optical fiber fixing component in the figure uses a pad and a pressure plate.

[0053] Figure 9 This is a side view of a coupling module provided in Embodiment 1 of the present invention.

[0054] Figure 10 for Figure 9 Top view.

[0055] Figure 11 for Figure 9 A bottom view.

[0056] Figure 12 This is a partial structural diagram of the coupling module in a receiving component provided in Embodiment 1 of the present invention.

[0057] Figure 13 This is a side view of another coupling module provided in Embodiment 1 of the present invention.

[0058] Figure 14 for Figure 13 Top view.

[0059] Figure 15 for Figure 13 A bottom view.

[0060] Figure 16 This is a partial structural diagram of the coupling module in another receiving component provided in Embodiment 1 of the present invention.

[0061] Figure 17 This is a three-dimensional structural schematic diagram of a coupling module provided in Embodiment 2 of the present invention.

[0062] Figure 18 for Figure 17 The left view.

[0063] Figure 19 for Figure 18 The left view.

[0064] Figure 20 for Figure 18 Front view of the machined surface.

[0065] Figure 21 This is a partial structural diagram of the coupling module in a receiving component provided in Embodiment 2 of the present invention.

[0066] Figure 22 This is a partial structural diagram of the coupling between the receiving component and the receiving chip in an optical module provided in Embodiment 3 of the present invention.

[0067] The markings in the diagram are as follows: 1. Light input module; 11. Connector; 12. Optical fiber; 13. Optical fiber fixing assembly; 14. Mating surface; 2. Arrayed waveguide grating; 21. Light input surface; 22. Light output surface; 3. Coupling module; 31. Incident surface; 32. Reflecting surface; 33. Lens array; 34. Lens; 41. Bare fiber; 42. Protective structure; 51. Capillary; 52. Channel; 53. Horn mouth; 54. Protective adhesive; 61. Pad; 62. V-groove; 63. Pressure plate; 64. Adhesive; 71. Prism; 72. Mirror body; 8. Reflective concave mirror array; 81. Reflective concave mirror; 82. Notch; 83. Bottom surface; 84. Processed surface; 85. Extension; 86. Lower surface; 87. End face; 9. Receiver chip; 91. Substrate. Detailed Implementation

[0068] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0069] Example 1

[0070] This embodiment provides a receiving component based on an arrayed waveguide grating, including an incident light module 1, a wavelet demultiplexing module, and a coupling module 3, such as... Figures 1-3 As shown, the input optical module 1 is connected to the wavelength demultiplexing module, and the wavelength demultiplexing module is connected to the coupling module 3. The input optical module 1 is mainly used to input the multiplexed optical signal into the wavelength demultiplexing module. The wavelength demultiplexing module is mainly used to demultiplex the multiplexed optical signal according to wavelength and output multiple wavelength optical signals. The coupling module 3 receives the optical signals of each wavelength and is used to realize the optical path turning and convergence functions, so that the optical signals of each wavelength can be better coupled to the receiving chip 9, so as to realize the mutual conversion between optical signals and electrical signals.

[0071] like Figures 1-4As shown, in this embodiment, the waveguide demultiplexing module includes an arrayed waveguide grating 2. The arrayed waveguide grating 2 (AWG) typically includes an input waveguide, a first planar waveguide, a waveguide array, a second planar waveguide, and an output waveguide. The input waveguide has an incident light surface 21 at its end face, which introduces a composite beam carrying multi-wavelength optical signals into the device. The first planar waveguide performs initial propagation and distribution of the optical signal. The waveguide array is the core component, composed of a series of waveguides with gradually varying lengths, where different wavelengths of light accumulate specific phase delays. In the second planar waveguide, optical signals with specific phase differences interfere. The output waveguide has an exit light surface 22 at its end face, which outputs the different wavelength optical signals after interference separation to their respective channels 52, thereby forming multiple wavelength optical signals. In this embodiment, the arrayed waveguide grating 2 uses an existing 4-channel 52-arrayed waveguide grating 2, such as... Figures 1-4 As shown, in other embodiments, the arrayed waveguide grating 2 can also be an 8-channel 52-arrayed waveguide grating 2, a 12-channel 52-arrayed waveguide grating 2, a 16-channel 52-arrayed waveguide grating 2, a 32-channel 52-arrayed waveguide grating 2, etc., depending on the actual needs, which will not be elaborated here.

[0072] like Figures 1-3 As shown, in this embodiment, the optical input module 1 includes a connector 11, an optical fiber 12, and an optical fiber fixing assembly 13. The connector 11 is mainly used to connect the external optical fiber 12. In implementation, the connector 11 can be an existing LC socket or LC connector 11, etc. For ease of description, the two ends of the optical fiber 12 are respectively the front end and the rear end. In implementation, as shown... Figures 1-3 As shown, one end (e.g., the front end) of the optical fiber 12 is connected to the connector 11, and the other end (e.g., the rear end) of the optical fiber 12 is connected to the optical fiber fixing assembly 13. The optical fiber fixing assembly 13 is mainly used to fix the end (rear end) of the optical fiber 12 and to enable the optical fiber 12 to be better precisely coupled with the arrayed waveguide grating 2 in the wavelet demultiplexing module, thereby reducing the loss and crosstalk of the optical signal during transmission. In implementation, the optical fiber fixing assembly 13 has various embodiments. For example, in one embodiment, the optical fiber fixing assembly 13 includes a capillary tube 51, which can be made of glass. The two ends of the capillary tube 51 are a first end and a second end, respectively. A channel 52 is constructed inside the capillary tube 51 that passes through the first end and the second end. Figure 5 and Figure 6As shown, the first end is constructed with a horn-shaped opening 53. During implementation, the inner diameter of the channel 52 is larger than the outer diameter of the bare fiber 41. During assembly, the protective structure 42, such as the plastic coating, is stripped from one end (rear end) of the optical fiber 12, exposing the bare fiber 41 covered with a coating. The bare fiber 41 is inserted into the channel 52 coated with adhesive to stabilize it, ensuring the optical fiber 12 maintains its correct position during use and preventing displacement, shaking, or bending, thus guaranteeing stable optical signal transmission. Simultaneously, protective adhesive 54 is applied at the horn-shaped opening 53 to cover the coating, achieving isolation and effective protection of the bare fiber 41. Finally, the first end of the capillary 51 is polished, and a mating surface 14 is formed at the first end of the capillary 51 to match the light-incident surface 21 in the adaptive array waveguide grating 2. Figure 5 and Figure 6 As shown. During assembly, the mating surface 14 is coupled to the light-incident surface 21 of the arrayed waveguide grating 2, thereby realizing the coupling between the optical fiber 12 and the arrayed waveguide grating 2.

[0073] For example, in another embodiment, the fiber optic fixing assembly 13 includes a pad 61 with a V-groove 62 and a pressure plate 63 adapted to the pad 61, such as Figure 7 and Figure 8 As shown, during assembly, one end (rear end) of the optical fiber 12 is positioned within the V-groove 62. The V-groove 62 provides precise positioning and support for the optical fiber 12, ensuring a stable position within it and achieving good optical coupling efficiency. During implementation, the V-groove 62 can be filled with adhesive 64. The pressure plate 63 can be fixed to the pad 61 using screws, clips, or adhesive, clamping the optical fiber 12 between the pressure plate 63 and the pad 61. Figure 7 and Figure 8 As shown, this achieves better protection and fixation of the optical fiber 12; finally, polishing pad 61 and pressure plate 63 at one end, and forming a mating surface 14 at that end to adapt to the light incident surface 21 in the array waveguide grating 2, as shown. Figure 7 and Figure 8 As shown. During assembly, the mating surface 14 of the fiber fixing assembly 13 is coupled with the light incident surface 21 of the arrayed waveguide grating 2, thereby realizing the optical coupling between the fiber 12 and the arrayed waveguide grating 2.

[0074] In implementation, the coupling module 3 includes an incident surface 31, a reflecting surface 32, and a lens array 33. The incident surface 31 is used to receive optical signals of various wavelengths. During assembly, such as... Figures 1-3 As shown, the incident surface 31 of the coupling module 3 couples the light-emitting surface 22 of the arrayed waveguide grating 2, thereby achieving coupling between the arrayed waveguide grating 2 and the coupling module 3; as Figure 9 or Figure 13As shown, the incident surface 31 corresponds to the reflecting surface 32, and the reflecting surface 32 corresponds to the lens array 33. The reflecting surface 32 is used to reflect each beam of light received by the incident surface 31, and to output each beam of light through the lens array 33 to the coupling module 3, so as to couple it to the receiving chip 9. Thus, the turning and converging functions of the optical path can be realized through the cooperation of the incident surface 31, the reflecting surface 32 and the lens array 33.

[0075] In implementation, the coupling module 3 has various embodiments. For example, in one embodiment, the coupling module 3 includes a prism 71 adapted to the arrayed waveguide grating 2 and a lens 34 assembly adapted to the prism 71. One side of the prism 71 is configured with an incident surface 31 that adapts to the light-emitting surface 22 in the arrayed waveguide grating 2, and the other side of the prism 71 is configured with a reflecting surface 32, which corresponds to the incident surface 31. Figure 1 , Figures 9-12 As shown; the lens 34 assembly includes a lens body 72 and a lens array 33 disposed on one side of the lens body 72. The lens array 33 includes a plurality of lenses 34 arranged in an array, such as... Figure 11 As shown, in implementation, the number of lenses 34 is the same as the number of channels 52 of the arrayed waveguide grating 2. Therefore, the number of lenses 34 in the lens array 33 can be 4, 8, 12, 16, or 32, etc. Of course, in other embodiments, the number of lenses 34 can also be greater than the number of channels 52 of the arrayed waveguide grating 2. During assembly, the incident surface 31 of the prism 71 is coupled to the light-emitting surface 22 of the arrayed waveguide grating 2, such as... Figure 12 As shown, the mirror body 72 is fixed to one side of the prism 71, so that the reflecting surface 32 corresponds to the lens array 33. This allows the light beam reflected from the reflecting surface 32 to be output to the coupling module 3 via the lens array 33, achieving both optical path deflection and convergence. In this embodiment, the lens 34 can preferably be a spherical lens, and the mirror body 72 and the lens array 33 can be integrally formed components, such as... Figures 9-11 As shown, this allows the entire lens 34 assembly to be a single molded component.

[0076] For example, in another embodiment, the coupling module 3 includes a mirror body 72 adapted to the arrayed waveguide grating 2 and a lens array 33 disposed on one side of the mirror body 72. One side of the mirror body 72 has an incident surface 31 adapted to the light-emitting surface 22 in the arrayed waveguide grating 2, while the other side of the mirror body 72 has a reflecting surface 32 corresponding to the incident surface 31. Figure 1 , Figures 13-15As shown, the lens array 33 corresponds to the reflecting surface 32; similarly, in implementation, the lens array 33 includes multiple lenses 34 arranged in an array, the number of lenses 34 being the same as the number of channels 52 of the arrayed waveguide grating 2. Therefore, the number of lenses 34 in the lens array 33 can be 4, 8, 12, 16, or 32, etc.; during assembly, the incident surface 31 of the mirror body 72 is coupled to the light-emitting surface 22 of the arrayed waveguide grating 2, as shown. Figure 16 As shown, this allows the light beam reflected from the reflecting surface 32 to be output to the coupling module 3 via the lens array 33, achieving not only the function of optical path deflection but also the function of optical path convergence. In this embodiment, the lens 34 can preferably be a spherical lens 34, and the mirror body 72 and the lens array 33 can be integrally formed components, such as... Figures 13-15 As shown, this allows the entire lens 34 assembly to be a single molded component.

[0077] To better achieve the optical path reversal function, in a more complete implementation, the reflective surface 32 of the coupling module 3 can be constructed as a total reflection surface 32 or a film can be coated on the reflective surface 32 to achieve a better reflection effect, which will not be elaborated here.

[0078] In a more refined approach, the incident surface 21 of the arrayed waveguide grating 2 is preferably constructed as an inclined surface tilted in the vertical direction, such as... Figure 4 As shown, correspondingly, the mating surface 14 of the fiber fixing component 13 is also constructed as an inclined surface in the vertical direction, which is beneficial to obtaining higher return loss. In implementation, the inclination angle of the light-incident surface 21 and the mating surface 14 can be determined according to actual needs. Preferably, the inclination angle of the light-incident surface 21 in the array waveguide grating 2 relative to the vertical direction is 2 to 30 degrees. Correspondingly, the inclination angle of the mating surface 14 in the fiber fixing component 13 relative to the vertical direction is 2 to 30 degrees, so that the array waveguide grating 2 only needs to be ground at a smaller angle, thereby effectively reducing the probability of damage during the manufacturing process of the array waveguide grating 2. More preferably, the inclination angle of the light-incident surface 21 in the array waveguide grating 2 relative to the vertical direction is 4 to 8 degrees; the inclination angle of the mating surface 14 in the fiber fixing component 13 relative to the vertical direction is 4 to 8 degrees, which is beneficial to achieving better results. As an example, in this embodiment, the light-incident surface 21 is inclined towards the transmission direction of the optical signal, such as Figure 1 and Figure 4 As shown, the angle θ1 between the incident surface 21 and the transmission direction of the optical signal is an acute angle, and the angle θ2 between the incident surface 21 and the vertical direction is 90 - θ1 = 8 degrees. Of course, in practice, the angle between the incident surface 21 and the vertical direction can also preferably be 4 degrees, 5 degrees, 6 degrees, or 7 degrees, etc., and the angle between the mating surface 14 and the vertical direction can also preferably be 4 degrees, 5 degrees, 6 degrees, or 7 degrees, etc., which will not be listed here.

[0079] In a more refined approach, the light-emitting surface 22 of the arrayed waveguide grating 2 is preferably constructed as an inclined surface tilted in the vertical direction, such as... Figure 4 As shown, correspondingly, the incident surface 31 of the coupling module 3 is also constructed as an inclined surface tilted in the vertical direction. In implementation, the tilt angles of the emitting surface 22 and the incident surface 31 can be determined according to actual needs. Preferably, the tilt angle of the emitting surface 22 in the arrayed waveguide grating 2 relative to the vertical direction is 2 to 30 degrees, and correspondingly, the tilt angle of the incident surface 31 in the coupling module 3 relative to the vertical direction is 2 to 30 degrees. This allows the arrayed waveguide grating 2 to only require grinding a smaller angle, thereby effectively reducing the probability of damage during the fabrication process of the arrayed waveguide grating 2. More preferably, the tilt angle of the emitting surface 22 in the arrayed waveguide grating 2 relative to the vertical direction is 4 to 8 degrees, and correspondingly, the tilt angle of the incident surface 31 in the coupling module 3 relative to the vertical direction is 4 to 8 degrees, which is beneficial for achieving better results. As an example, in this embodiment, the tilt direction of the emitting surface 22 is away from the transmission direction of the optical signal, such as... Figure 1 and Figure 4 As shown, the angle θ3 between the light-emitting surface 22 and the direction of optical signal transmission is an obtuse angle, such as... Figure 4 As shown, the angle θ4 between the light-emitting surface 22 and the vertical direction is θ3 - 90 = 8 degrees. Of course, in practice, the angle between the light-emitting surface 22 and the vertical direction can also be preferably 4 degrees, 5 degrees, 6 degrees, or 7 degrees, and the angle between the incident surface 31 and the vertical direction can also be preferably 4 degrees, 5 degrees, 6 degrees, or 7 degrees, etc., which will not be listed here.

[0080] like Figure 1 and Figure 4 As shown, the tilt direction of the incident surface 21 of the arrayed waveguide grating 2 is opposite to the tilt direction of the emitting surface 22, which is more conducive to obtaining higher return loss. In implementation, the angle between the incident surface 21 and the vertical direction in the arrayed waveguide grating 2 can be equal to the angle between the emitting surface 22 and the vertical direction in the arrayed waveguide grating 2.

[0081] In practice, the mating surface 14 of the fiber fixing component 13 can be glued to the light-incident surface 21 of the array waveguide grating 2, which not only connects the fiber fixing component 13 and the array waveguide grating 2 into one unit, but also enables a more stable coupling between the mating surface 14 of the fiber fixing component 13 and the light-incident surface 21 of the array waveguide grating 2. In implementation, the incident surface 31 of the coupling module 3 can be glued to the light-emitting surface 22 of the array waveguide grating 2. This not only fixes the coupling module 3 to the array waveguide grating 2 and connects the coupling module 3 and the array waveguide grating 2 as a whole, but also enables a more stable coupling between the light-emitting surface 22 of the array waveguide grating 2 and the incident surface 31 of the coupling module 3. More importantly, the coupling module 3 can effectively protect the light-emitting surface 22 of the array waveguide grating 2 and converge the divergent light, thereby effectively increasing the distance between the array waveguide grating 2 (AWG) and the receiving chip 9 (PD). This can further reduce the probability of damage to the receiving chip 9 and the array waveguide grating 2 during the coupling process, and effectively improve the coupling efficiency between the array waveguide grating 2 (AWG) and the receiving chip 9 (PD).

[0082] Example 2

[0083] The main difference between this embodiment 2 and embodiment 1 is that the structure of the coupling module 3 in the receiving component based on an arrayed waveguide grating provided in this embodiment is different. In this embodiment, the coupling module 3 includes a reflective concave mirror array 8, such as... Figure 17 As shown, the reflective concave mirror array 8 includes multiple reflective concave mirrors 81 arranged in an array. The light-emitting surface 22 corresponds to each reflective concave mirror 81. In implementation, the number of reflective concave mirrors 81 in the reflective concave mirror array 8 is the same as the number of channels in the arrayed waveguide grating 2, and each channel of the arrayed waveguide grating 2 corresponds to each reflective concave mirror 81. The reflective concave mirrors 81 are used to achieve the turning and converging of the optical path, such as... Figure 21 As shown. In this embodiment, a reflective concave mirror 81 is used to achieve the turning and converging functions of the optical path, which can effectively protect the light-emitting surface 22 of the arrayed waveguide grating 2 and converge the diverging light, thereby effectively increasing the distance between the arrayed waveguide grating 2 and the receiving chip 9. This can further reduce the probability of damage to the receiving chip 9 and the arrayed waveguide grating 2 during the coupling process, and effectively improve the coupling efficiency between the arrayed waveguide grating 2 and the receiving chip 9.

[0084] As an example, in this embodiment, the coupling module 3 further includes a mirror 72 adapted to the arrayed waveguide grating, such as... Figures 17-21 As shown, a notch 82 is formed on one side of the mirror body 72, and a machined surface 84 is formed on the bottom surface 83 of the notch 82 along the width direction of the mirror body 72. The machined surface 84 is a plane, as shown in the figure. Figure 17 and Figure 18As shown, during implementation, the machining surface 84 is inclined in the vertical direction, and the reflective concave mirror array 8 is constructed within the machining surface 84, as... Figures 17-21 As shown. During assembly, one end of the mirror body 72 can be connected to the arrayed waveguide grating 2, and the light-emitting surface 22 can correspond to the reflective concave mirror array 8. In implementation, by constructing a notch 82 on one side of the mirror body 72 and connecting one end of the mirror body 72 to the arrayed waveguide grating 2, the light-emitting surface 22 of the arrayed waveguide grating 2 can be covered by the mirror body 72. This reduces the probability of damage to the arrayed waveguide grating 2 during coupling, enabling the coupling module 3 to achieve more stable and precise coupling with the light-emitting surface 22 of the arrayed waveguide grating 2. Furthermore, the coupling module 3 can effectively protect the light-emitting surface 22 of the arrayed waveguide grating 2 and converge the diverging light, which is beneficial to improving coupling efficiency.

[0085] In practical implementation, one end of the mirror body 72 can be connected to the arrayed waveguide grating 2 via adhesive 64. It is understood that, in implementation, the outer contour of other parts of the mirror body 72 can be determined according to actual needs. For example, such as... Figures 17-21 As shown, one end of the mirror body 72 is also provided with an extension 85. The extension 85 is constructed on the upper side of the notch 82, and the lower surface 86 of the extension 85 is connected to the bottom surface 83 of the groove. In practice, the lower surface 86 of the extension 85 is preferably constructed as a plane, such as... Figure 18 As shown, to avoid blocking the light signal; during assembly, the end face 87 of the extension 85 can be aligned with the light-emitting surface of the arrayed waveguide grating 2, as shown. Figure 21 As shown, adhesive 64 can be provided between the end face 87 of the extension 85 and the light-emitting surface to achieve a stable connection between the mirror body 72 and the arrayed waveguide grating 2. In implementation, the end face 87 of the extension 85 can be constructed to be perpendicular to the horizontal direction or to be constructed as an inclined surface to better fit the light-emitting surface 22 of the arrayed waveguide grating 2.

[0086] Example 3

[0087] This embodiment provides an optical module, including the receiving component described in Embodiment 1 or Embodiment 2, and a housing. The housing has an assembly space, and the receiving component is disposed within the assembly space. In implementation, the housing may include a base and a top plate, with the top plate detachably disposed on the base, forming the assembly space between the top plate and the base.

[0088] In a more refined embodiment, the optical module further includes a substrate 8 disposed within the housing, such as... Figure 22 As shown, substrate 8 can preferably be a glass plate or glass block, and the fiber fixing component 13 and / or arrayed waveguide grating 2 in the receiving assembly can be fixed to substrate 8. This optical module also includes a receiving chip 9 disposed within the housing. The receiving chip 9 is located below the coupling module 3 and corresponds to the lens array 33 in the coupling module 3, as shown... Figure 22 As shown, in actual use, the multiplexed optical signal is input to the arrayed waveguide grating 2 in the wave demultiplexing module via the input optical module 1. The arrayed waveguide grating 2 separates the multiplexed optical signal according to wavelength and outputs optical signals of multiple wavelengths. The coupling module 3 receives the optical signals of each wavelength and uses them to realize the optical path turning and converging functions, so that the optical signals of each wavelength are emitted from the coupling module 3 through the lens 34 in the lens array 33 and coupled to the receiving chip 9, so as to realize the mutual conversion between optical signals and electrical signals.

[0089] In a more refined embodiment, the housing is also provided with an opening for assembling a connector 11, which is disposed at the opening so as to connect an external optical fiber 12 through the opening.

[0090] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An arrayed waveguide grating based receiving assembly, characterized by The system includes a wavelength demultiplexing module and a coupling module. The wavelength demultiplexing module includes an arrayed waveguide grating, which has an input surface and an output surface. The arrayed waveguide grating is used to separate the multiplexed optical signal into multiple wavelength optical signals. The coupling module is coupled to the output surface of the arrayed waveguide grating, and the optical path is turned and converged through the coupling module.

2. The arrayed waveguide grating-based receiving assembly of claim 1, wherein, The coupling module includes an incident surface, a reflecting surface, and a lens array that are adapted to the light-emitting surface. The lens array includes multiple lenses arranged in an array, with the incident surface corresponding to the reflecting surface and the reflecting surface corresponding to the lens array. The reflecting surface is used to achieve the deflection of the light path, and the lenses are used to achieve the convergence of the light path. The incident surface of the coupling module is coupled to the light-emitting surface of the arrayed waveguide grating.

3. The arrayed waveguide grating-based receiving assembly of claim 2, wherein, The number of lenses in the lens array is the same as the number of channels in the arrayed waveguide grating; Alternatively, the reflective surface may be constructed as a total reflective surface or a reflective surface with a coating.

4. The arrayed waveguide grating-based receiving assembly of claim 1, wherein, The coupling module includes a reflective concave mirror array, which comprises multiple reflective concave mirrors arranged in an array, with the light-emitting surface corresponding to each reflective concave mirror. The reflective concave mirrors are used to achieve the turning and converging of the light path.

5. The arrayed waveguide grating-based receiving assembly of claim 4, wherein, The coupling module also includes a mirror body adapted to the arrayed waveguide grating. A notch is formed on one side of the mirror body, and a plane is formed on the bottom surface of the notch along the width direction of the mirror body. The plane is inclined in the vertical direction, and the reflective concave mirror array is formed in the plane. One end of the mirror body corresponds to the arrayed waveguide grating, and the light-emitting surface corresponds to the array of reflective concave mirrors.

6. The arrayed waveguide grating-based receiving assembly of claim 2, wherein, The light-emitting surface of the arrayed waveguide grating is constructed as an inclined plane in the vertical direction, and the inclination angle of the light-emitting surface of the arrayed waveguide grating relative to the vertical direction is 2 to 30 degrees.

7. The arrayed waveguide grating-based receiving assembly of claim 6, wherein, The light-emitting surface of the arrayed waveguide grating is tilted at an angle of 4 to 8 degrees relative to the vertical direction.

8. The arrayed waveguide grating-based receiving assembly of claim 6, wherein, The incident surface of the coupling module is constructed as an inclined plane in the vertical direction, and the angle of inclination of the incident surface of the coupling module relative to the vertical direction is 2 to 30 degrees.

9. The arrayed waveguide grating-based receiving assembly of claim 8, wherein, The incident surface of the coupling module is tilted at an angle of 4 to 8 degrees relative to the vertical direction.

10. The arrayed waveguide grating-based receiving assembly of claim 8, wherein, The tilt angle of the incident surface in the coupling module is matched with the tilt angle of the light-emitting surface in the arrayed waveguide grating; The light-emitting surface of the arrayed waveguide grating is tilted at an angle of 4 degrees, 6 degrees, or 8 degrees relative to the vertical direction. The incident surface of the coupling module is tilted at an angle of 4, 6, or 8 degrees relative to the vertical direction.

11. The arrayed waveguide grating-based receiving assembly of claim 4, wherein, It also includes an input light module, which includes an optical fiber and an optical fiber fixing assembly. The rear end of the optical fiber is fixed to the optical fiber fixing assembly. The optical fiber fixing assembly is constructed with a mating surface adapted to the light-incident surface in the arrayed waveguide grating. The mating surface of the optical fiber fixing assembly is connected to the light-incident surface of the arrayed waveguide grating, so that the rear end of the optical fiber is coupled to the light-incident surface of the input light waveguide.

12. The arrayed waveguide grating-based receiving assembly of claim 11, wherein, The light-incident surface of the arrayed waveguide grating is constructed as an inclined plane in the vertical direction; the mating surface of the fiber fixing assembly is constructed as an inclined plane in the vertical direction.

13. The arrayed waveguide grating-based receiving assembly of claim 12, wherein, The incident surface of the arrayed waveguide grating is tilted at an angle of 2 to 30 degrees relative to the vertical direction; Alternatively, the mating surface of the fiber optic fixing assembly may be tilted at an angle of 2 to 30 degrees relative to the vertical direction.

14. The arrayed waveguide grating-based receiving assembly of claim 13, wherein, The incident surface of the arrayed waveguide grating is tilted at an angle of 4 to 8 degrees relative to the vertical direction; the mating surface of the fiber fixing assembly is tilted at an angle of 4 to 8 degrees relative to the vertical direction. Alternatively, the angle between the mating surface and the vertical direction in the fiber fixing assembly matches the angle between the incident surface and the vertical direction in the arrayed waveguide grating.

15. The arrayed waveguide grating-based receiving assembly of claim 12, wherein, In an arrayed waveguide grating, the tilt direction of the incident surface is opposite to that of the exit surface; And / or, the angle between the incident surface and the vertical direction in the arrayed waveguide grating is the same as the angle between the emitting surface and the vertical direction in the arrayed waveguide grating.

16. The arrayed waveguide grating-based receiving assembly of claim 12, wherein, The mating surfaces of the fiber optic fixing components are bonded to the light-incident surfaces of the arrayed waveguide grating with adhesive. The incident surface in the coupling module is bonded to the light-emitting surface in the arrayed waveguide grating by adhesive.

17. The arrayed waveguide grating-based receiving assembly of claim 2, wherein, The coupling module includes a prism adapted to an arrayed waveguide grating and a lens assembly adapted to the prism. The incident surface is constructed on one side of the prism, and the reflecting surface is constructed on the other side of the prism. The lens assembly includes a mirror body and the lens array. The lens array is disposed on one side of the mirror body, and the mirror body is fixed to one side of the prism, such that the reflecting surface corresponds to the lens array. The incident surface of the prism is coupled to the light-emitting surface of the arrayed waveguide grating. Alternatively, the coupling module includes a mirror body adapted to the arrayed waveguide grating and the lens array, with the incident surface constructed on one side of the mirror body, the reflecting surface constructed on the other side of the mirror body, and the lens array disposed on one side of the mirror body; the incident surface of the mirror body is coupled to the light-emitting surface of the arrayed waveguide grating.

18. The arrayed waveguide grating-based receiving assembly of claim 11, wherein, The fiber fixing assembly includes a capillary tube with a channel extending through both ends. One end of the capillary tube has a flared opening, and the inner diameter of the channel is larger than the outer diameter of the bare fiber. The bare fiber is stripped from the rear end of the fiber and inserted into the channel coated with adhesive. Protective adhesive is applied at the flared opening to cover the coating layer. The mating surface is formed on the end of the capillary tube opposite to the flared opening. Alternatively, the optical fiber fixing assembly includes a pad with a V-groove and a pressure plate adapted to the pad, with the rear end of the optical fiber disposed in the V-groove, the pressure plate fixed to the pad, and the optical fiber clamped between the pressure plate and the pad; the mating surface is formed at one end of the pad and the pressure plate. Alternatively, the optical input module may further include a connector, the front end of which is connected to the connector, and the connector is used to connect to an external optical fiber; Alternatively, the coupling module may be a single-piece molded component.

19. An optical module characterized by comprising: Includes the receiving component as described in any one of claims 1-18.

20. The optical module of claim 19, wherein, It also includes a housing, a substrate disposed within the housing, and a receiving chip, wherein the housing has an assembly space and the receiving component is disposed within the assembly space; The optical fiber fixing component and / or arrayed waveguide grating in the receiving component are fixed to the substrate; the receiving chip is located below the coupling module and corresponds to the coupling module, and is used to receive the optical signal output by the coupling module.

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