Multi-channel wavelength division multiplexing device and optical module

Abstract

The utility model provides a multichannel wavelength division multiplexing device and optical module, including: an optical port pin, a base, a cushion block, a light splitting assembly, an array lens and an array detector, the cushion block and the array detector are both arranged on the base, the optical port pin, the light splitting assembly and the array lens are all arranged on the cushion block, the light splitting assembly is arranged on the cushion block, and the array lens is arranged on the base. The optical port pin, the light splitting assembly and the array lens are sequentially coupled along an optical path, and the array lens is coupled with the array detector; the light splitting assembly is used for splitting light signals emitted by the light port pin and coupling multiple paths of light signals after light splitting to the array lens, and the array lens is used for focusing the multiple paths of light signals to the array detector; the light splitting assembly and the array lens are integrated on the cushion block for common passive mounting, active coupling between the lens and the detector does not need to be carried out, and the overall coupling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, and in particular to a multi-channel wavelength division multiplexing device and optical module. Background Technology

[0002] In current optical communication modules, the optical receiver module is a crucial component in the optical communication system. The optical receiver module includes: optical port pins, a beam splitter for splitting the light, and a detector chip that converts the optical signal into an electrical signal. The beam splitter needs to be coupled to the detector chip to divide the optical path into multiple paths. The optical signals from each channel output of the beam splitter are coupled to the active region of the detector chip, where they are converted into photocurrent.

[0003] Because the active region diameter of the detector chip is on the micrometer scale, the light spots of each optical path split by the beam splitting component are relatively large, making it difficult to accurately couple to the active region of the detector chip. Therefore, it is usually necessary to add a lens before coupling, first actively coupling the lens to the detector, and then actively coupling the beam splitting device to the lens and the detector chip. The problem with this method is that there are many coupling steps, all of which are active coupling, which leads to steps such as light source debugging and measurement during the coupling process, resulting in a slow overall coupling and packaging efficiency of the device.

[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0005] The problem this invention aims to solve is how to improve the coupling efficiency of wavelength division multiplexing-related devices in an optical receiver module.

[0006] In a first aspect, a multi-channel wavelength division multiplexing (WDM) device is provided, comprising: an optical port ferrule 1, a base 2, a pad 3, a beam splitter assembly 4, an array lens 5, and an array detector 6, wherein:

[0007] The pad 3 and the array detector 6 are both disposed on the base 2. The optical port pin 1, the beam splitter 4 and the array lens 5 are all disposed on the pad 3. The optical port pin 1, the beam splitter 4 and the array lens 5 are coupled sequentially along the optical path. The array lens 5 is coupled to the array detector 6.

[0008] The beam splitter 4 and the array lens 5 are integrated on the pad 3 and are passively mounted together.

[0009] Preferably, the beam-splitting component 4 includes: a first rhomboid prism 41, wherein:

[0010] One end face of the first rhomboid prism 41 is the input end 411, and the other end face of the first rhomboid prism 41 is the output end 412. The input end 411 is disposed towards the optical port 1, and the output end 412 is disposed towards the array lens 5. The input end 411 and the output end 412 are parallel, and both the input end 411 and the output end 412 are at a first preset angle with the emitted light from the optical port 1. The first preset angle is less than 90 degrees.

[0011] The input terminal 411 is used to transmit light signals from the optical port 1. After the light signal is transmitted from the input terminal 411 to the interior of the first rhomboid prism 41, it is reflected back and forth multiple times between different positions of the input terminal 411 and different positions of the output terminal 412. Each time the light signal is reflected from the input terminal 411 to a different position on the output terminal 412, a light signal of a preset wavelength is transmitted from a different position on the output terminal 412 to the array lens 5.

[0012] Preferably, the first preset angle is 8°~12°.

[0013] Preferably, both the inner surface of the input terminal 411 and the inner surface of the output terminal 412 are coated with an anti-reflection film and a reflective film.

[0014] Preferably, the beam-splitting component 4 further includes: an array filter 42, wherein:

[0015] The array filter 42 is disposed on the outer surface of the output terminal 412;

[0016] The array filter 42 includes multiple sub-filters 421 arranged in an array; each sub-filter 421 corresponds to a different optical signal transmission position on the output terminal 412, so as to filter the optical signal transmitted from the output terminal 412.

[0017] Preferably, the beam-splitting component 4 further includes: a second rhomboid prism 43, wherein:

[0018] The second rhombic prism 43 is disposed on the pad 3 and is located in the optical path between the optical port pin 1 and the input end 411;

[0019] The first rhomboid prism 41 includes two opposing and parallel reflective surfaces; the optical signal output from the optical port 1 enters the first rhomboid prism 41 and is reflected from one of the reflective surfaces to the other reflective surface, and then from the other reflective surface to the input terminal 411.

[0020] Preferably, the array lens 5 includes a plurality of sub-lenses 51 arranged in an array;

[0021] The array detector 6 includes multiple sub-detectors 61 arranged in an array;

[0022] The position of each of the sub-lenses 51 corresponds to the position of the corresponding sub-detector 61.

[0023] Preferably, the height of the pad 3 is 2±0.1mm.

[0024] Preferably, the multi-channel wavelength division multiplexing device further includes: a transimpedance amplifier 7, wherein:

[0025] The transimpedance amplifier 7 is disposed on the base 2, and the transimpedance amplifier 7 is electrically connected to the array detector 6;

[0026] The transimpedance amplifier 7 is used to convert the current of the array detector 6 into a voltage signal.

[0027] Secondly, an optical module includes the aforementioned multi-channel wavelength division multiplexing device.

[0028] This invention provides a multi-channel wavelength division multiplexing (WDM) device and optical module, comprising: an optical port 1, a base 2, a pad 3, a beam splitter 4, an array lens 5, and an array detector 6. The pad 3 and the array detector 6 are both mounted on the base 2. The optical port 1, beam splitter 4, and array lens 5 are all mounted on the pad 3. The optical port 1, beam splitter 4, and array lens 5 are coupled sequentially along the optical path. The array lens 5 is coupled to the array detector 6. The beam splitter 4 splits the optical signal emitted from the optical port 1 and couples the split multi-channel optical signals to the array lens 5. The array lens 5 focuses the multi-channel optical signals into the array detector 6. By integrating the beam splitter 4 and the array lens 5 onto the pad 3 for passive mounting, active coupling between the lens and the detector is eliminated, improving the overall coupling efficiency. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the structure of a multi-channel wavelength division multiplexing device provided in an embodiment of this utility model;

[0031] Figure 2 A schematic diagram of another multi-channel wavelength division multiplexing device provided in this embodiment of the present invention;

[0032] Figure 3A schematic diagram of another multi-channel wavelength division multiplexing device provided in this embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of another multi-channel wavelength division multiplexing device provided in this embodiment of the present invention;

[0034] Figure 5 A schematic diagram of the structure of another multi-channel wavelength division multiplexing device provided in this embodiment of the present invention;

[0035] Figure 6 A schematic diagram of the structure of another multi-channel wavelength division multiplexing device provided in this embodiment of the present invention;

[0036] The attached figures are numbered as follows:

[0037] 1. Optical port jack; 2. Base; 3. Spacer; 4. Beam splitter assembly; 41. First rhombic prism; 411. Input terminal; 412. Output terminal; 42. Array filter; 421. Second rhombic prism; 5. Array lens; 51. Array detector; 6. Sub-detector; 61. Transimpedance amplifier; 7. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0039] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0040] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0041] In describing some embodiments, the terms "coupled," "coupled," and "connected," and their derivative expressions, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "connected" or "coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other, such as "optical coupling" or "wireless connection." The embodiments disclosed herein are not necessarily limited to the scope of this invention.

[0042] In the description of this utility model, "A and / or B" will be used to represent specific features. The corresponding expressions include the following three combinations: only A, only B, and a combination of A and B.

[0043] As used in this invention, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the specified value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the specified quantity, i.e., the limitations of the measurement system.

[0044] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0045] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0046] Example 1:

[0047] This embodiment provides a multi-channel wavelength division multiplexing device, such as... Figure 1 and Figure 2 As shown, the system includes: an optical port pin 1, a base 2, a spacer 3, a beam splitter 4, an array lens 5, and an array detector 6. The spacer 3 and the array detector 6 are both mounted on the base 2. The optical port pin 1, beam splitter 4, and array lens 5 are all mounted on the spacer 3. The optical port pin 1, beam splitter 4, and array lens 5 are coupled sequentially along the optical path. The array lens 5 is coupled to the array detector 6. The beam splitter 4 and array lens 5 are integrated on the spacer 3 and passively mounted together. The beam splitter 4 splits the optical signal output from the optical port pin 1 and couples the split multi-channel optical signals to the array lens 5. The array lens 5 focuses the multi-channel optical signals into the array detector 6.

[0048] In this embodiment, the optical port pin 1 is used to couple and receive optical signals from other external devices. The optical signal output from the optical port pin 1 is divided into multiple optical signals after passing through the beam splitter 4. Each optical signal passes through the array lens 5, which is used to focus the received optical signal, thereby reducing the light spot of the optical signal so that the optical signal can be more efficiently converged into the active area of ​​the detector, thereby improving the coupling efficiency.

[0049] Wherein: the array lens 5 includes multiple sub-lenses 51 arranged in an array, each sub-lens 51 being used to focus one of the corresponding optical signals; such as Figure 6As shown, the array detector 6 includes multiple sub-detectors 61 arranged in an array. The position of each sub-lens 51 corresponds to the position of the corresponding sub-detector 61. Each sub-detector 61 is used to receive the focused light signal from the corresponding sub-lens 51. Each sub-lens 51 can be glued to the corresponding prism with adhesive of suitable light transmittance, serving as the array lens 5.

[0050] In this embodiment, the array detector 6 is positioned on the base 2 facing the array lens 5. The optical port pin 1 outputs optical signals in a horizontal direction. After the optical signal is split horizontally by the beam splitter 4 and emitted, each beam is received by the array detector 6 after passing through the corresponding sub-lens 51. On the other hand, in this embodiment, the vertical distance between the array lens 5 and the array detector 6 needs to be approximately the focal length of each sub-lens 51 in the array lens 5. By adjusting the position of the array detector 6 on the base 2, the distance between the array detector 6 and the array lens 5 is adjusted, thereby achieving the corresponding distance requirement.

[0051] In this embodiment, the height of the pad 3 is 2 ± 0.1 mm. Specifically, the height of the pad 3 can be 1.9 mm, 2 mm, or 2.1 mm. Since the pad 3 raises the optical port pin 1, the beam splitter 4, and the array lens 5 to a corresponding height, the height of the array detector 6 must correspond to the height of the array lens 5 to ensure that the array detector 6 can be coupled to the array lens 5.

[0052] In this embodiment, in order to ensure the packaging efficiency and coupling efficiency during packaging, the beam splitting component 4 with beam splitting function and the array lens 5 with focusing function need to be integrated into a single component that can be packaged separately. Therefore, in this embodiment, the beam splitting component 4 and the array lens 5 can be pre-mounted on the pad 3 by passive coupling, and the beam splitting component 4 and the array lens 5 are integrated together by the pad 3. This process requires the beam splitting component 4 and the array lens 5 to correspond. This component integrates the functions of beam splitting and focusing. In this embodiment, it is called the beam splitting and focusing integrated component.

[0053] Based on the above, the beam-splitting and focusing integrated component can be mounted on the base 2 in a passive or active manner, ensuring the correspondence between the array lens 5 and the array detector 6 during encapsulation. The passive mounting method can be achieved by identifying the center of the photosensitive surface of each sub-detector 61 in the array detector 6 and the center of each sub-lens 51 in the array lens 5, and mechanically controlling the position of the beam-splitting and focusing integrated component on the base 2 so that the center of the photosensitive surface of each sub-detector 61 coincides with the center of the corresponding sub-lens 51. The beam-splitting and focusing integrated component is then encapsulated on the base 2. The active method can be achieved by opening the optical port pin 1 and using a suction head to adsorb the beam-splitting and focusing integrated component, thereby controlling its position. Simultaneously, the magnitude of the response current converted from the light signal received by the array detector 6 is monitored in real time. When the response current is at its maximum value, the beam-splitting and focusing integrated component is bonded to the base 2 by dispensing adhesive for curing.

[0054] Compared to existing technologies that first actively couple the lens to the detector and then actively couple the beam splitter to both the lens and the detector, this embodiment eliminates the need for coupling between the lens and the detector. Furthermore, since active coupling is not required, it reduces the steps involved in light source adjustment and measurement during active coupling, greatly accelerating the overall packaging efficiency.

[0055] Furthermore, regarding the beam splitter 4, in this embodiment, the optical signal output from the optical port jack 1 needs to be divided into multiple optical signals by the beam splitter 4, while also ensuring that the split multiple optical signals are parallel to each other. Therefore, this embodiment also involves the following design:

[0056] like Figure 3 As shown, the beam splitting component 4 includes: a first rhomboid prism 41, wherein: one end face of the first rhomboid prism 41 is an input end 411, and the other end face of the first rhomboid prism 41 is an output end 412. The input end 411 is disposed toward the optical port 1, and the output end 412 is disposed toward the array lens 5. The input end 411 and the output end 412 are parallel, and both the input end 411 and the output end 412 are at a first preset angle with the emitted light from the optical port 1, the first preset angle being less than 90 degrees.

[0057] The input terminal 411 is used to transmit light signals from the optical port 1. After the light signal is transmitted from the input terminal 411 to the interior of the first rhomboid prism 41, it is reflected back and forth multiple times between different positions of the input terminal 411 and different positions of the output terminal 412. Each time the light signal is reflected from the input terminal 411 to a different position on the output terminal 412, a light signal of a preset wavelength is transmitted from a different position on the output terminal 412 to the array lens 5.

[0058] In this embodiment, the first preset angle is set by those skilled in the art according to actual conditions. The first preset angle is 8°~12°, wherein the first preset angle can be 8°, the first preset angle can be 10°, or the first preset angle can be 12°. The preset wavelength is determined by the antireflection film deposited on the output terminal 412. The wavelength of the light signal transmitted from the output terminal 412 is determined according to the antireflection film. Figure 3 As shown, since the input end 411 is parallel to the output end 412, when the light signal is incident from the input end 411 onto the first rhomboid prism 41, it will first strike the output end 412. At this time, part of the light signal will be directly transmitted out from the output end 412. Since the outgoing direction of the light signal is not at a 90-degree angle to the output end 412, another part of the light signal will be reflected back to the input end 411 at a certain angle. The light signal reaching the input end 411 will be reflected back to the output end 412 at a certain angle again. The above process is repeated multiple times in the first rhomboid prism 41. Each time the light signal is reflected from the input end 411 to the output end 412, the direction is parallel to the direction in which the light signal is incident on the first rhomboid prism 41. Simultaneously, each time the light signal is reflected from the output end 412 to the input end 411, the transmission directions are parallel to each other, and the reflection positions of the light signal at the input end 411 and the output end 412 are different each time. Figure 3 As shown, the optical signal is reflected and transmitted at four different positions on the output end 412 and reflected at three different positions on the input end 411. The transmission directions of the optical signal reflected to the output end 412 each time are parallel to each other, thereby splitting the original optical signal into four parallel optical paths, which are then transmitted to the array lens 5.

[0059] In this embodiment, in order to achieve reflection and transmission at the input terminal 411 and the output terminal 412, an anti-reflection film and a reflective film are coated on the inner surface of the input terminal 411 and the inner surface of the output terminal 412.

[0060] Furthermore, in this embodiment, since the split optical signal still needs to be filtered to ensure the reception quality of the optical signal, this embodiment also involves the following design:

[0061] like Figure 4 and Figure 5 As shown, the beam splitting component 4 further includes an array filter 42, wherein: the array filter 42 is disposed on the outer surface of the output end 412; the array filter 42 includes a plurality of sub-filters 421 arranged in an array; each of the sub-filters 421 corresponds to a different optical signal transmission position on the output end 412, so as to filter the optical signal transmitted from the output end 412.

[0062] In this embodiment, the spacing between adjacent sub-filters 421 is greater than the spacing between sub-detectors 61, and the spacing between adjacent sub-filters 421 corresponds to the spacing between adjacent sub-lenses 51. The array filter 42 can be bonded to the outer side of the output end 412 of the first rhomboid prism 41 with adhesive of acceptable light transmittance.

[0063] Furthermore, considering the packaging position of the optical port pin 1 on the base 2 and the relative position of the first rhombic prism 41 on the base 2, it is difficult to couple the optical signal emitted from the optical port pin 1 to a suitable position on the input end 411 of the first rhombic prism 41 when the position of the optical port pin 1 is limited. Therefore, it is necessary to adjust the optical signal emitted from the optical port pin 1 through other devices so that the optical signal emitted from the optical port pin 1 can be coupled to the first rhombic prism 41 at a suitable position. Therefore, this embodiment also involves the following design:

[0064] like Figure 4 and Figure 5 As shown, the beam splitting component 4 further includes a second rhomboid prism 43, wherein: the second rhomboid prism 43 is disposed on the pad 3 and located in the optical path between the optical port 1 and the input terminal 411; the first rhomboid prism 41 includes two opposing and parallel reflective surfaces; the optical signal output from the optical port 1 enters the first rhomboid prism 41 and is reflected from one reflective surface to the other reflective surface, and then reflected from the other reflective surface to the input terminal 411.

[0065] like Figure 4 As shown in the figure, the optical signal output position of the optical port pin 1 is slightly higher. If the optical signal is directly incident into the first rhomboid prism 41 from the position of the optical port pin 1, the incident optical signal cannot be reflected a sufficient number of times within the limited width of the first rhomboid prism 41, thus failing to split a sufficient number of optical paths, and also failing to guarantee that the split optical paths will exit from the designated position of the output end 412. Therefore, in this embodiment, a second rhomboid prism 43 is set between the optical port pin 1 and the input end 411. The position of the optical path is adjusted by the two oppositely arranged reflective surfaces of the second rhomboid prism 43. Since the two reflective surfaces are parallel to each other, the optical paths before and after adjustment are parallel to each other.

[0066] Furthermore, in this embodiment, the optical signal received by the array detector 6 also needs to be converted into a voltage signal to realize the basic function of the device. Therefore, this embodiment also involves the following design:

[0067] like Figure 6As shown, the multi-channel wavelength division multiplexing device further includes a transimpedance amplifier 7, wherein: the transimpedance amplifier 7 is disposed on the base 2, and the transimpedance amplifier 7 is electrically connected to the array detector 6 through an optical waveguide; the transimpedance amplifier 7 is used to convert the current of the array detector 6 into a voltage signal.

[0068] In this embodiment, the optical waveguide can be mounted on the base plate, thereby reducing the space occupied.

[0069] In summary, the device provided in this embodiment offers the following beneficial effects:

[0070] 1. By pre-passively mounting the beam splitter and array lens 5 onto the same pad 3 as a beam splitting and focusing integrated component, and then mounting the beam splitting and focusing integrated component later, there is no need for the active coupling step between the lens and the detector. Furthermore, the beam splitting and focusing integrated component can also be mounted passively, thus reducing the steps of light source debugging and measurement in active coupling and greatly accelerating the overall packaging efficiency.

[0071] 2. By setting up array lens 5 to focus the light paths after each beam split, the problem of large divergence of the light emitted from beam splitting component 4 is solved.

[0072] Example 2:

[0073] This embodiment, based on Embodiment 1, provides an optical module including the multi-channel wavelength division multiplexing device described in Embodiment 1. In practical use, other related components can be added according to the specific application scenario of the optical module. The specific structure of the multi-channel wavelength division multiplexing device is detailed above and will not be repeated here.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-channel wavelength division multiplexing device, characterized in that, include: The optical port connector (1), base (2), pad (3), beam splitter (4), array lens (5), and array detector (6) are as follows: The pad (3) and the array detector (6) are both disposed on the base (2). The optical port pin (1), the beam splitter (4) and the array lens (5) are all disposed on the pad (3). The optical port pin (1), the beam splitter (4) and the array lens (5) are coupled sequentially along the optical path. The array lens (5) is coupled to the array detector (6). The beam splitter (4) and the array lens (5) are integrated on the pad (3) and are passively mounted together.

2. The multi-channel wavelength division multiplexing device according to claim 1, characterized in that, The beam-splitting component (4) includes: a first rhomboid prism (41), wherein: One end face of the first rhomboid prism (41) is the input end (411), and the other end face of the first rhomboid prism (41) is the output end (412). The input end (411) is positioned towards the optical port pin (1), and the output end (412) is positioned towards the array lens (5). The input end (411) and the output end (412) are parallel to each other. Both the input end (411) and the output end (412) are at a first preset angle to the light emitted from the optical port pin (1). The first preset angle is less than 90 degrees. The input terminal (411) is used to transmit light signals from the optical port pin (1). After the light signal is transmitted from the input terminal (411) to the interior of the first rhomboid prism (41), it is reflected back and forth multiple times between different positions of the input terminal (411) and different positions of the output terminal (412). Each time the light signal is reflected from the input terminal (411) to a different position on the output terminal (412), a light signal of a preset wavelength is transmitted from a different position on the output terminal (412) to the array lens (5).

3. The multi-channel wavelength division multiplexing device according to claim 2, characterized in that, The first preset angle is 8°~12°.

4. The multi-channel wavelength division multiplexing device according to claim 2, characterized in that, The inner surface of the input terminal (411) is coated with a reflective film, and the inner surface of the output terminal (412) is coated with an anti-reflective film and a reflective film.

5. The multi-channel wavelength division multiplexing device according to claim 2, characterized in that, The beam splitting component (4) further includes: an array filter (42), wherein: The array filter (42) is disposed on the outer surface of the output end (412); The array filter (42) includes multiple sub-filters (421) arranged in an array; each sub-filter (421) corresponds to a different optical signal transmission position on the output end (412) to filter the optical signal transmitted from the output end (412).

6. The multi-channel wavelength division multiplexing device according to claim 2, characterized in that, The beam-splitting component (4) further includes: a second oblique prism (43), wherein: The second rhombic prism (43) is disposed on the pad (3) and located in the optical path between the optical port pin (1) and the input end (411); The first rhombic prism (41) includes two opposing and parallel reflective surfaces; the optical signal output by the optical port pin (1) enters the first rhombic prism (41) and is reflected from one of the reflective surfaces to the other reflective surface, and from the other reflective surface to the input terminal (411).

7. The multi-channel wavelength division multiplexing device according to claim 1, characterized in that, The array lens (5) includes multiple sub-lenses (51) arranged in an array. The array detector (6) includes multiple sub-detectors (61) arranged in an array. The position of each of the sub-lenses (51) corresponds to the position of the corresponding sub-detectors (61).

8. The multi-channel wavelength division multiplexing device according to any one of claims 1-7, characterized in that, The height of the pad (3) is 2±0.1mm.

9. The multichannel wavelength division multiplexing device according to any one of claims 1-7, characterized in that, The multi-channel wavelength division multiplexing device further includes: a transimpedance amplifier (7), wherein: The transimpedance amplifier (7) is disposed on the base (2), and the transimpedance amplifier (7) is electrically connected to the array detector (6); The transimpedance amplifier (7) is used to convert the current of the array detector (6) into a voltage signal.

10. An optical module, characterized in that, Includes the multichannel wavelength division multiplexing device as described in any one of claims 1-9.

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