Multi-port optical communication module

Abstract

The utility model relates to a multi-port optical communication module. The multi-port optical communication module comprises an input end optical chip array, an input end collimating mirror array, a multi-port optical circulator core, a receiving end coupling mirror array, a receiving end detector array, a wavelength division multiplexer and a common end coupling lens, the input end optical chip array is used for providing signal light with different wavelengths; the input end collimating mirror array is used for respectively collimating signal light with different wavelengths; the multi-port optical circulator core comprises a first polarization splitting prism, a half-wave plate, a Faraday optical rotation crystal and a second polarization splitting prism; the wavelength division multiplexer is used for combining or splitting the signal light output by the multi-port optical circulator core; the common end coupling lens couples the signal light passing through the wavelength division multiplexer to the common port or couples the signal light of the common port to the wavelength division multiplexer; and the receiving end coupling mirror array converges the signal light returned by the public port to the receiving end detector array. The multi-port optical communication module not only is favorable for improving the optical communication efficiency, but also is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of optical communications, and in particular to a multi-port optical communication module. Background Art

[0002] In modern optical communication systems, optical circulators are important devices, and their quality and performance directly determine the communication efficiency and stability of the entire system. Traditional optical circulators are mainly composed of three ports, but with the growth of data traffic and the need for parallel processing of multiple services, traditional optical circulators can no longer meet the needs of modern optical communication systems. Although some solutions have proposed the use of optical circulators with six or more ports, these solutions usually have some problems: for example, the traditional multi-port optical circulator structure has problems such as high complexity and high cost, and its application in high-density integrated optical communication systems is limited. They may require complex control logic, additional hardware, or have high insertion loss, resulting in unsatisfactory overall performance. Therefore, it is necessary to design an optical communication module with a simplified structure, reduced cost and suitable for high-density integrated optical communication systems to better cope with the growing demand for optical communications. Utility Model Content

[0003] The utility model aims to provide a multi-port optical communication module, which is not only conducive to improving the optical communication efficiency, but also has a simple structure and low manufacturing cost.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-port optical communication module, comprising an input end optical chip array, an input end collimating mirror array, a multi-port optical circulator core, a receiving end coupling mirror array, a receiving end detector array, a wavelength division multiplexer and a common end coupling lens arranged in sequence;

[0005] The input optical chip array is a module input optical port, which is used to provide signal lights of different wavelengths;

[0006] The input end collimator mirror array collimates signal lights of different wavelengths respectively and transmits them to the multi-port optical circulator core;

[0007] The multi-port optical circulator core comprises a first polarization beam splitter prism, a half-wave plate, a Faraday rotator crystal and a second polarization beam splitter prism. The cross section of the first polarization beam splitter prism is a rectangular structure, and a first polarization beam splitter film and a high reflection film are arranged inside the first polarization beam splitter prism, which is divided into three parts: upper, middle and lower parts. The cross section of the second polarization beam splitter prism is a right-angle trapezoidal structure with a bottom angle of 45°, and a second polarization beam splitter film is arranged inside the second polarization beam splitter prism. The first polarization beam splitter film forms an angle of 45° with the lower end face of the first polarization beam splitter prism, and the high reflection film An angle of 45° is formed with the upper end face of the first polarization beam splitter prism and it is parallel to the first polarization beam splitter film; the right end face of the first polarization beam splitter prism is bonded to the left end face of the half-wave plate; the right end face of the half-wave plate is bonded to the left end face of the Faraday rotator crystal; the right end face of the Faraday rotator crystal is bonded to the left end face where the long bottom side of the second polarization beam splitter prism is located; the second polarization beam splitter film is parallel to the lower end face where the oblique waist side of the second polarization beam splitter prism is located, and the lower end face of the second polarization beam splitter prism is provided with a high reflection film;

[0008] The wavelength division multiplexer combines or splits the signals output by the multi-port optical circulator core;

[0009] The common end coupling lens couples the signal light passing through the wavelength division multiplexer to the common port or couples the signal light of the common port to the wavelength division multiplexer;

[0010] The receiving end coupling mirror array converges the common port return signal light to the receiving end detector array respectively.

[0011] Furthermore, the multi-port optical circulator core has three signal ports, signal port Port1 is located on the left end face of the middle part of the first polarization beam splitter prism, signal port Port2 is located on the right end face where the short bottom side of the second polarization beam splitter prism is located, and signal port Port3 is located on the lower end face of the first polarization beam splitter prism.

[0012] Furthermore, the input end optical chip array and the input end collimating mirror array constitute a signal light transmitting port and are located on the signal port Port1; the wavelength division multiplexer and the common end coupling lens constitute a signal light common port and are located on the signal port Port2; the receiving end coupling mirror array and the receiving end detector array constitute a signal light receiving port and are located on the signal port Port3.

[0013] Furthermore, the first polarization splitter film and the second polarization splitter film are used to separate or synthesize P-polarized light and S-polarized light in the signal light; the half-wave plate and the Faraday rotator crystal are bonded together to rotate the polarization of the signal light in a single transmission direction by 90°, while not rotating the polarization of the signal light in the other transmission direction.

[0014] Furthermore, the positions of the half-wave plate and the Faraday rotator crystal are interchangeable.

[0015] Furthermore, the cross-section of the wavelength division multiplexer is a parallelogram structure, a filter is attached to the left end surface of the wavelength division multiplexer facing the multi-port optical circulator core, and a reflector is attached to the right end surface of the wavelength division multiplexer facing the common end coupling lens, and the filter is used to transmit signal light of one wavelength and reflect signal light of other wavelengths.

[0016] Furthermore, the right end face of the wavelength division multiplexer forms a design angle of 76.5° with the lower end face.

[0017] Furthermore, the number of the wavelength division multiplexers is 2n, where n is a natural number.

[0018] Furthermore, all the bonding surfaces and signal port surfaces are provided with anti-reflection films.

[0019] Furthermore, the angle at which the signal light enters the multi-port optical circulator core is 1 to 4 degrees.

[0020] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a multi-port optical communication module, simplifies the complex combination of traditional multi-port optical circulators, has lower production and assembly costs, and realizes efficient transmission and control of optical signals, which can meet the needs of more efficient optical communication. The multi-port optical communication module can be flexibly applied to various optical communication systems and is suitable for different signal transmission channel requirements, such as high-throughput and high-speed signal transmission of four, eight, and sixteen signal ports, bringing a new solution to the field of optical communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A front view of a simplified implementation structure of a multi-port optical communication module according to an embodiment of the utility model;

[0022] Figure 2 A top view of a simplified implementation structure of a multi-port optical communication module according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of a simplified implementation structure of a multi-port optical circulator core in an embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the signal light in the multi-port optical circulator core propagating from the signal port Port1 to the signal port Port2 in the embodiment of the utility model;

[0025] Figure 5 It is a schematic diagram of the signal light in the multi-port optical circulator core propagating from the signal port Port2 to the signal port Port3 in the embodiment of the utility model;

[0026] Figure 6This is a schematic diagram of a simplified implementation structure of a wavelength division multiplexer in an embodiment of the utility model;

[0027] Figure 7 This is a schematic diagram of light propagation of a wavelength division multiplexer in an embodiment of the utility model;

[0028] Figure 8 This is a light path diagram of a multi-port optical communication module applied to four channels in Embodiment 1 of the utility model;

[0029] Fig. 9 This is a front view of a simplified implementation structure of a multi-port optical communication module applied to eight channels in Embodiment 2 of the present utility model;

[0030] Fig.10 A top view of a simplified implementation structure of a multi-port optical communication module applied to eight channels in Embodiment 2 of the present utility model;

[0031] Fig.11 This is a light path diagram of a multi-port optical communication module applied to eight channels in Embodiment 2 of the present utility model;

[0032] Fig.12 This is a front view of a simplified implementation structure of a multi-port optical communication module applied to eight channels in Embodiment 3 of the present utility model;

[0033] Fig.13 A top view of a simplified implementation structure of a multi-port optical communication module applied to eight channels in Embodiment 3 of the present utility model;

[0034] Fig.14 This is a light path diagram of the multi-port optical communication module applied to eight channels in the second embodiment of the present utility model.

[0035] Figure 1 , 2 middle:

[0036] 101-input end optical chip array; 102-input end collimating mirror array; 103-multi-port optical circulator core; 104-receiving end coupling mirror array; 105-receiving end detector array; 106-wavelength division multiplexing; 107-common end coupling mirror.

[0037] Figure 3 middle:

[0038] 1031 - first polarization beam splitter prism; 1032 - half-wave plate; 1033 - Faraday rotator crystal; 1034 - second polarization beam splitter prism; 1035 - high reflection film; 1036 - first polarization beam splitter film; 1037 - second polarization beam splitter film.

[0039] Figure 6 middle:

[0040] 1061 - first filter; 1062 - second filter; 1063 - third filter; 1064 - fourth filter; 1065 - rhombus prism; 1066 - first reflector; 1067 - second reflector; 1068 - third reflector.

[0041] Fig. 9 , 10 middle:

[0042] 1091-input end optical chip array; 1092-input end collimating mirror array; 1093-multi-port optical circulator core component array; 1094-wavelength division multiplexing array; 1095-rhombic prism; 1096-wavelength division multiplexing; 1097-common end coupling mirror.

[0043] Fig.12 , 13 middle:

[0044] 1201-input end optical chip array; 1202-input end collimating mirror array; 1203-crawling prism; 1204-rhombic prism; 1205-multi-port optical circulator core assembly; 1206-first wavelength division multiplexing; 1207-second wavelength division multiplexing; 1208-common end coupling mirror.

[0045] In all the drawings, the same reference numerals represent the same technical features, the bidirectional short arrows represent the P light polarization state, the dots represent the S light polarization state; different colored lights represent signal lights of different wavelengths. DETAILED DESCRIPTION

[0046] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0047] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] like Figure 1 , 2As shown, this embodiment provides a multi-port optical communication module, including an input end optical chip array 101, an input end collimating mirror array 102, a multi-port optical circulator core 103, a receiving end coupling mirror array 104, a receiving end detector array 105, a wavelength division multiplexer 106 and a common end coupling lens 107 arranged in sequence.

[0050] The input optical chip array 101 is a module input optical port, which is used to emit signal lights of different wavelengths.

[0051] The input end collimator mirror array 102 collimates signal lights of different wavelengths and transmits them to the multi-port optical circulator core 103 .

[0052] The wavelength division multiplexer 106 combines or splits the signals of different wavelengths output by the multi-port optical circulator core 103 .

[0053] The common end coupling lens 107 couples the signal light passing through the wavelength division multiplexer 106 to the common port or couples the signal light of the common port to the wavelength division multiplexer 106 .

[0054] The receiving end coupling mirror array 104 converges the signal lights of different wavelengths returned from the common port onto the receiving end detector array 105 .

[0055] like Figure 3 As shown, the multi-port optical circulator core is composed of a first polarization beam splitter prism 1031, a half-wave plate 1032, a Faraday rotator crystal 1033 and a second polarization beam splitter prism 1034. The cross section of the first polarization beam splitter prism 1031 is a rectangular structure, and a first polarization beam splitter film 1036 and a high reflection film 1035 are arranged inside the first polarization beam splitter prism 1031, which is divided into three parts: upper, middle and lower. The first polarization beam splitter film 1036 forms an angle of 45° with the lower end face of the first polarization beam splitter prism 1031, and the high reflection film 1035 forms an angle of 45° with the upper end face of the first polarization beam splitter prism 1031 and is parallel to the first polarization beam splitter film 1036. The cross section of the second polarization beam splitter prism 1034 is a right-angled trapezoidal structure with a bottom angle of 45°, and a second polarization beam splitter film 1037 is arranged inside the second polarization beam splitter prism 1034. The right end face of the cross section of the first polarization beam splitter prism 1031 is bonded to the left end face of the half-wave plate 1032. The right end face of the half-wave plate 1032 not bonded to the first polarization beam splitter prism 1031 is bonded to the left end face of the Faraday rotator crystal 1033; the right end face of the Faraday rotator crystal not bonded to the half-wave plate 1032 is bonded to the left end face of the long bottom side of the cross section of the second polarization beam splitter prism 1034. The second polarization beam splitter film 1037 forms an angle of 45° with the upper end face of the right-angled side of the cross section of the second polarization beam splitter prism 1034, and is parallel to the lower end face of the oblique waist side of the cross section of the second polarization beam splitter prism 1034. The lower end face of the second polarization beam splitter prism 1034 is provided with a high reflection film.

[0056] like Figure 4 , 5 As shown, the multi-port optical circulator core has three signal ports, signal port Port1 is located on the left end face of the middle part of the first polarization beam splitter prism 1031, signal port Port2 is located on the right end face where the short bottom side of the second polarization beam splitter prism 1034 is located, and signal port Port3 is located on the lower end face of the first polarization beam splitter prism 1031.

[0057] The input-end optical chip array 101 and the input-end collimator lens array 102 form a signal light transmitting port and are located on the signal port Port1, for transmitting signal lights of different wavelengths and transmitting them to the signal port Port1 of the multi-port optical circulator core 103. The wavelength division multiplexer 106 and the common-end coupling lens 107 form a signal light common port and are located on the signal port Port2, for coupling out signal lights of different wavelengths and transmitting the returned signal lights at different wavelengths to the signal port Port2 of the multi-port optical circulator core 103. The receiving-end coupling mirror array 104 and the receiving-end detector array 105 form a signal light receiving port and are located on the signal port Port3, for receiving the returned signal lights of different wavelengths output from the signal port Port2 of the multi-port circulator core 103.

[0058] In the multi-port optical circulator core 103, the first polarization beam splitter film 1036 and the second polarization beam splitter film 1037 are used to separate or synthesize the P polarization light and the S polarization light in the signal light; the half-wave plate 1032 and the Faraday rotator crystal 1033 are bonded together to form a rotation mechanism, which is used to rotate the polarization of the signal light in a single transmission direction by 90°, while not rotating the polarization of the signal light in the other transmission direction; in this embodiment, the polarization direction rotates by 90° when the light propagates from left to right, and does not rotate when the light propagates from right to left. It should be noted that the positions of the half-wave plate and the Faraday rotator crystal are interchangeable.

[0059] like Figure 4As shown, the signal light is incident from the signal port Port1 to the left end face of the middle part of the first polarization beam splitter prism 1031, and after passing through the first polarization beam splitter film 1036, the P light in the signal light is transmitted, and the S light is reflected and then reflected by the high reflection film 1035 in the first polarization beam splitter prism 1031. After the P light and the S light pass through the half-wave plate 1032 and the Faraday rotator crystal 1033 respectively, the original P light is changed into S light, and the original S light is changed into P light. The rotated P light is incident into the second polarization beam splitter prism 1034, and is transmitted by the second polarization beam splitter film 1037. The rotated S light is incident into the second polarization beam splitter prism 1034, and is reflected by the lower end face of the second polarization beam splitter prism 1034, and then reflected by the second polarization beam splitter film 1037. The P light and the S light are combined and transmitted to the signal port Port2.

[0060] like Figure 5 As shown, the signal light enters the second polarization beam splitter prism 1034 from the signal port Port2, and after passing through the second polarization beam splitter film 1037, the P light in the signal light is transmitted, and the S light is reflected. The S light is reflected by the lower end face of the second polarization beam splitter prism 1034. After the P light and the S light pass through the Faraday rotator crystal 1033 and the half-wave plate 1032 respectively, the polarization states of the P light and the S light do not change. The P light is incident on the first polarization beam splitter prism 1031, and after being reflected by the high-reflection film 1035, it is transmitted through the first polarization beam splitter film 1036. The S light is incident on the first polarization beam splitter prism 1031, and is reflected by the first polarization beam splitter film 1036. The P light and the S light are combined and transmitted to the signal port Port3.

[0061] like Figure 6 , 7As shown, the cross section of the wavelength division multiplexer is a parallelogram structure, a filter is attached to the left end surface of the wavelength division multiplexer 106 facing the multi-port optical circulator core 103, and a reflector is attached to the right end surface of the wavelength division multiplexer 106 facing the common end coupling lens 107, and the filter is used to transmit a signal light of one wavelength and reflect signal lights of other wavelengths. In this embodiment, the wavelength division multiplexer includes a first filter 1061, a second filter 1062, a third filter 1063, a fourth filter 1064, an oblique square prism 1065, a first reflector 1066, a second reflector 1067, and a third reflector 1068. The first, second, third, and fourth filters 1061, 1062, 1063, and 1064 are bonded to the left end face of the rhombus prism 1065. The cross-sections of the first, second, third, and fourth filters 1061, 1062, 1063, and 1064 are parallelogram structures for screening different signal lights. The cross-section of the rhombus prism 1065 is a parallelogram structure. The first, second, and third reflectors 1066, 1067, and 1068 are bonded to the right end face of the rhombus prism 1065 for turning the light path. The cross-sections of the first, second, and third reflectors 1066, 1067, and 1068 are parallelogram structures. When light propagates from left to right, signal lights of different wavelengths are combined and output. When light propagates from right to left, signal lights are split and output according to different wavelengths. In this embodiment, the right end face of the wavelength division multiplexer forms a design angle of 76.5° with the lower end face.

[0062] In this embodiment, all the bonding surfaces and signal port surfaces are provided with anti-reflection films.

[0063] In this embodiment, the angle at which the signal light enters the core of the multi-port optical circulator is 1-4°.

[0064] In one embodiment of the utility model, the multi-port optical communication module is applied to four channels, and its optical path diagram is as follows Figure 8 In addition, the multi-port optical communication module described in the first embodiment can be connected in parallel to meet the needs of more band selection.

[0065] like Figure 9-11As shown, the second embodiment of the utility model provides an embodiment of a multi-port optical communication module applied to eight channels. In this embodiment, the multi-port optical communication module includes an input end optical chip array 1091, an input end collimator lens array 1092, a multi-port optical circulator core component array 1093 (including a receiving end coupling mirror array 104 and a receiving end detector array 105), a wavelength division multiplexing array 1094, a rhombus prism 1095, a wavelength division multiplexing 1096 and a common end coupling mirror 1097. The input end optical chip array 1091 and the input end collimator lens array 1092 are combined into a signal light emission port. After the signal light is emitted from the signal light emission port, it passes through the multi-port optical circulator core component array 1093 and the wavelength division multiplexing array 1094. After the four-channel signal light located in the upper half of the input end optical chip passes through the rhombus prism, the signal light of all channels is transmitted to the wavelength division multiplexing 1096 and finally output by the common end coupling mirror 1097. After the signal light returned from the common end passes through the common end coupling mirror 1097 and the wavelength division multiplexing 1096, it is respectively transmitted to the lower half of the multi-port optical circulator core component array 1093 and the rhombus prism. The signal light transmitted to the rhombus prism is transmitted to the upper half of the multi-port optical circulator core component array 1093 after the rhombus prism turns the optical path. Finally, all the signal lights are transmitted to the receiving end detector array in the multi-port optical circulator core component array 1093 according to different wavelengths. Compared with the first embodiment, the second embodiment is suitable for optical communication transmission with more wavelength band selection by connecting two components of the first embodiment in parallel and adding a wavelength division multiplexing component and an rhombus prism.

[0066] like Figure 12-14As shown, Embodiment 3 of the present utility model provides another embodiment of a multi-port optical communication module applied to eight channels. In this embodiment, the multi-port optical communication module includes an input end optical chip array 1201, an input end collimating mirror array 1202, a crawling prism 1203, an orthometric prism 1204, a multi-port optical circulator core assembly 1205 (including a receiving end coupling mirror array 104 and a receiving end detector array 105), a first wavelength division multiplexing 1206, a second wavelength division multiplexing 1207 and a common end coupling mirror 1208. The cross section of the crawling prism is a right-angle trapezoidal structure with a bottom angle of 45°, and a high-reflection film is coated inside, which can turn and lift the optical path. The input end optical chip array 1201 and the input end collimating lens array 1202 are combined into a signal light emission port. After the signal light is emitted from the signal light emission port, the four-channel signal light located in the lower part of the input end optical chip array 1201 first passes through the crawling prism 1203 and the rhombus prism 1204, and then is input into the multi-port optical circulator core component 1205 together with the four-channel signal light in the upper part of the input end optical chip array 1201. After passing through the multi-port optical circulator core component 1205, the signal lights of eight wavelengths are respectively transmitted to the first wavelength division multiplexing 1206, and are combined into two signal lights by the first wavelength division multiplexing 1206, and then transmitted to the second wavelength division multiplexing 1207, and finally combined into one signal light and transmitted to the common end coupling mirror 1208 for output. The signal light returned from the common end passes through the common end coupling mirror 1208, the second wavelength division multiplexing 1207 and the first wavelength division multiplexing 1206, and is transmitted to the multi-port optical circulator core assembly 1205 respectively. All signal lights are transmitted to the receiving end detector array in the multi-port optical circulator core assembly 1205 according to different wavelengths. Compared with the second embodiment, the third embodiment adds a turning prism and a crawling prism at the input optical port, and couples more signal lights of different wavelength bands into the same multi-port circulator core at the same time and transmits them to the common port, which reduces the difficulty of assembly and makes the overall structure more compact.

[0067] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A multi-port optical communication module, characterized in that: It includes an input end optical chip array, an input end collimating mirror array, a multi-port optical circulator core, a receiving end coupling mirror array, a receiving end detector array, a wavelength division multiplexer and a common end coupling lens which are arranged in sequence; The input optical chip array is a module input optical port, which is used to provide signal lights of different wavelengths; The input end collimator mirror array collimates signal lights of different wavelengths respectively and transmits them to the multi-port optical circulator core; The multi-port optical circulator core comprises a first polarization beam splitter prism, a half-wave plate, a Faraday rotator crystal and a second polarization beam splitter prism. The cross section of the first polarization beam splitter prism is a rectangular structure, and a first polarization beam splitter film and a high reflection film are arranged inside the first polarization beam splitter prism, which is divided into three parts: upper, middle and lower parts. The cross section of the second polarization beam splitter prism is a right-angle trapezoidal structure with a bottom angle of 45°, and a second polarization beam splitter film is arranged inside the second polarization beam splitter prism. The first polarization beam splitter film forms an angle of 45° with the lower end face of the first polarization beam splitter prism, and the high reflection film An angle of 45° is formed with the upper end face of the first polarization beam splitter prism and it is parallel to the first polarization beam splitter film; the right end face of the first polarization beam splitter prism is bonded to the left end face of the half-wave plate; the right end face of the half-wave plate is bonded to the left end face of the Faraday rotator crystal; the right end face of the Faraday rotator crystal is bonded to the left end face where the long bottom side of the second polarization beam splitter prism is located; the second polarization beam splitter film is parallel to the lower end face where the oblique waist side of the second polarization beam splitter prism is located, and the lower end face of the second polarization beam splitter prism is provided with a high reflection film; The wavelength division multiplexer combines or splits the signals output by the multi-port optical circulator core; The common end coupling lens couples the signal light passing through the wavelength division multiplexer to the common port or couples the signal light of the common port to the wavelength division multiplexer; The receiving end coupling mirror array converges the common port return signal light to the receiving end detector array respectively.

2. A multi-port optical communication module according to claim 1, characterized in that: The multi-port optical circulator core has three signal ports, signal port Port1 is located on the left end face of the middle part of the first polarization beam splitter prism, signal port Port2 is located on the right end face where the short bottom side of the second polarization beam splitter prism is located, and signal port Port3 is located on the lower end face of the first polarization beam splitter prism.

3. A multi-port optical communication module according to claim 2, characterized in that: The input end optical chip array and the input end collimating mirror array constitute a signal light transmitting port and are located on the signal port Port1; the wavelength division multiplexer and the common end coupling lens constitute a signal light common port and are located on the signal port Port2; the receiving end coupling mirror array and the receiving end detector array constitute a signal light receiving port and are located on the signal port Port3.

4. A multi-port optical communication module according to claim 1, characterized in that: The first polarization splitter film and the second polarization splitter film are used to separate or synthesize P-polarized light and S-polarized light in the signal light; the half-wave plate and the Faraday rotator crystal are bonded together to rotate the polarization of the signal light in a single transmission direction by 90°, while not rotating the polarization of the signal light in the other transmission direction.

5. The multi-port optical communication module according to claim 1, characterized in that: The positions of the half-wave plate and the Faraday rotator crystal are interchangeable.

6. A multi-port optical communication module according to claim 1, characterized in that: The cross-section of the wavelength division multiplexer is a parallelogram structure. A filter is attached to the left end surface of the wavelength division multiplexer facing the multi-port optical circulator core, and a reflector is attached to the right end surface of the wavelength division multiplexer facing the common end coupling lens. The filter is used to transmit signal light of one wavelength and reflect signal light of other wavelengths.

7. A multi-port optical communication module according to claim 6, characterized in that: The right end face of the wavelength division multiplexer forms a design angle of 76.5° with the lower end face.

8. The multi-port optical communication module according to claim 1, characterized in that: The number of the wavelength division multiplexers is 2n, where n is a natural number.

9. The multi-port optical communication module according to claim 1, characterized in that: All mating surfaces and signal port faces are anti-reflection coated.

10. The multi-port optical communication module according to claim 1, characterized in that: The angle at which the signal light enters the multi-port optical circulator core is 1~4°.

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