Omnidirectional domain laser communication optical system and method

Abstract

The invention relates to the technical field of laser communication, and particularly discloses an omni-directional domain laser communication optical system and method, and the system comprises a laser receiving and transmitting system, a collimation coupling system, a scanning system, a relay system, and a panoramic antenna system. The panoramic antenna system used for receiving large-view-field optical signals and emitting the optical signals is reversibly connected with the relay system used for focusing laser through an optical path. The relay system is reversibly connected with a light path of a scanning system for deflection scanning of the collimated laser; the scanning system and the collimation coupling system are reversibly connected through light paths; and the collimation coupling system is reversibly connected with a light path of the laser receiving and transmitting system, so that the collimation coupling system collimates laser output by the laser receiving and transmitting system or couples the collimated laser to the laser receiving and transmitting system. Compared with an existing laser communication system, the laser communication system has a wider receiving angle, more alignment errors or attitude changes can be accepted compared with a traditional technology, dependence on a high-precision tracking system is reduced, and operation and maintenance are simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of space laser communication, and in particular to an omnidirectional laser communication optical system and method. Background Art

[0002] Traditional space laser communication is widely used in the military field due to its strong directivity, concentrated optical power and difficulty in eavesdropping, and is favored for its high confidentiality. With the development of technology, the improvement of space laser communication is constantly advancing, especially the space optical communication networking technology has also attracted new attention.

[0003] Space laser communication uses laser beams to directly transmit information in the atmosphere or outer space, and is suitable for scenarios where wired or optical fiber networks cannot be established. Compared with radio microwave communication, laser communication has advantages such as low cost and high speed. Due to its good monochromaticity, low cost and easy installation, laser communication has attracted widespread attention from various countries.

[0004] At present, the research and application of laser communication are mainly focused on point-to-point communication mode, but with the advancement of technology, more and more studies have begun to explore laser communication schemes for point-to-multipoint and multi-point simultaneous communication to realize a wider space laser communication network. For example, the technical research report released by the European Space Agency (ESA) in 2021, titled "Low Earth Orbit Satellite Laser Communication Network," proposed a laser communication network architecture based on low-orbit satellites (LEO), focusing on laser communication links between multiple satellites and high-speed communication between satellites and ground stations. The core of the system design is to use laser links between satellites for data transmission, while the ground station communicates with the satellite in both directions through laser links. Studies have shown that this system can greatly improve the bandwidth and transmission rate of space communications and effectively reduce dependence on ground infrastructure. In addition, KA Ivanov and VMPetrov's paper "Satellite Laser Communication for Global Networks" published in the journal Russian Space Communications Journal in 2022 also proposed a solution for satellite networking using laser communication. This scheme is based on the laser communication link between the high-orbit satellite GEO and the low-orbit satellite LEO, and explores how to achieve data relay and forwarding between satellites at different orbital levels through laser links, thereby effectively expanding the coverage of laser communication. The advantage of this design is that it provides a wide range of coverage through high-orbit satellites, while low-orbit satellites are responsible for high-speed data transmission in local areas. Similarly, in terms of optical antenna technology, the Chinese patent with the publication number CN116366155B and the name of a compact annular field of view satellite laser communication terminal proposes a compact annular field of view satellite laser communication terminal for the height and size of the compressed laser communication terminal required by the satellite stacking technology, so that the height of the optical path can be greatly compressed while the annular field of view can be achieved. ±180° azimuth and ±10° pitch, while effectively reducing the size and weight of the laser communication terminal. These schemes and technological advances demonstrate the various application potentials of space laser communication and provide different solutions for the future laser communication network architecture. However, the above-mentioned traditional methods generally have the problems of small field of view and large volume of traditional laser communication.

[0005] Based on this, how to further improve the annular field of view to adapt to the development of science and technology has become a technical problem that technical personnel in this field urgently need to overcome. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects existing in the above-mentioned prior art, thereby providing an omnidirectional laser communication optical system and method.

[0007] An omnidirectional laser communication optical system, comprising: a laser transceiver system, a collimation coupling system, a scanning system, a relay system and a panoramic antenna system; The optical paths of the panoramic antenna system for receiving optical signals with a large field of view, transmitting optical signals, and the relay system for focusing the laser are reversibly connected; The relay system and the scanning system optical path for deflecting and scanning the collimated laser are reversibly connected; The optical paths of the scanning system and the collimation coupling system are reversibly connected; The collimation coupling system and the laser transceiver system are reversibly connected in optical path, so that the collimation coupling system can collimate the laser output by the laser transceiver system or couple the collimated laser to the laser transceiver system.

[0008] Preferably, the laser transceiver system comprises: a transmitting system for generating original laser light and a receiving system for receiving laser light; the transmitting system and the receiving system are connected via an optical circulator; The transmitting system is located at the first port of the optical circulator, and the emitted 1550nm narrow line laser is emitted from the second port of the optical circulator; The receiving system is located at the third port of the optical circulator and receives the collimated laser signal at the second port to form the same-aperture laser transmission and reception.

[0009] Preferably, the collimating coupling system is composed of a sixth meniscus lens, a seventh meniscus lens and an eighth meniscus lens which are optically connected in sequence and whose curvatures gradually decrease; Wherein, the sixth meniscus lens is connected to the optical path of the scanning system; The eighth meniscus lens is connected to the optical path of the laser transceiver system; The collimation coupling system has an aperture of 50 mm.

[0010] Preferably, the relay system is composed of six spherical lenses, specifically a fourth meniscus lens, a second biconvex lens, a third biconvex lens, a fourth biconcave lens, a fifth meniscus lens and a plano-concave lens which are optically connected in sequence; Wherein, the fourth biconcave lens and the fifth meniscus lens constitute a double cemented lens; The fourth meniscus lens is optically connected to the panoramic antenna system; The plano-concave lens is connected to the optical path of the scanning system.

[0011] Preferably, the panoramic antenna system comprises a free-form surface reflector assembly, a biconcave lens, a first meniscus lens, a first biconvex lens, a second meniscus lens and a third meniscus lens which are optically connected in sequence; Wherein, the free-form surface reflector assembly is connected with a plurality of transmitting terminal optical signals; The third meniscus lens is connected to the optical path of the relay system.

[0012] Preferably, the entrance pupil diameter of the relay system is 50 mm.

[0013] Preferably, the field of view of the panoramic antenna system is ±30°~±70°; The entrance pupil diameter of the panoramic antenna system is 50mm; the focal ratio F number is 1.5, the image height is 80mm, and the focal length is 75mm.

[0014] An omnidirectional laser communication optical method is implemented by using an omnidirectional laser communication optical system, the method comprising: a working process as a transmitting device and a working process as a receiving device; Workflow as a launcher: A laser transceiver system is used to emit laser; The emitted laser enters the scanning system after being collimated by the collimation coupling system; Control the beam deflection output to the relay system by changing the deflection angle of the scanning system; The relay system will image the laser beam of the scanning system onto the panoramic antenna system; The panoramic antenna system emits at a nearly diffraction-limited beam angle; Workflow as a receiving device: The panoramic antenna system receives optical signals from multiple laser communication terminals; The panoramic antenna system compresses the light beams from different fields of view and inputs them into the relay system; The relay system sends the received light beam to the scanning system for deflection and then to the collimation coupling system; The collimation coupling system couples the light beam from the scanning system to the laser transceiver system to complete the communication.

[0015] The technical solution of the present invention has the following advantages: 1) The omnidirectional laser communication system has a wider receiving angle than the existing laser communication system, and has a higher tolerance to alignment errors or attitude changes than the existing technology, which reduces the dependence on high-precision tracking systems and simplifies operation and maintenance.

[0016] 2) A circulator is used for same-aperture transmission and reception. The system has a simple design, low production cost, and good maintainability, making it suitable for large-scale deployment.

[0017] 3) The overall system has a simple structure, low cost and easy operation.

[0018] 4) The laser communication system can be integrated into cube satellites and can realize networking communication between multiple cube satellites when working, providing a new technical approach for building large-scale low-orbit constellations in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a composition diagram of the present invention; Figure 2 It is the work flow chart of the present invention; Figure 3 This is a schematic diagram of the circulator operation; Figure 4 Calculation flow chart for free-form surfaces; Figure 5 It is a working schematic diagram of the present invention; Figure 6 This is a schematic diagram of the MTF of the panoramic antenna.

[0021] Description of reference numerals: 1-panoramic antenna system, 1-1-free-form surface reflector assembly, 1-2-double concave lens, 1-3-first meniscus lens, 1-4-first double convex lens, 1-5-second meniscus lens, 1-6-third meniscus lens; 2-relay system, 2-1-fourth meniscus lens, 2-2-second biconvex lens, 2-3-third biconvex lens, 2-4-fourth biconcave lens, 2-5-fifth meniscus lens, 2-6-plano-concave lens; 3- Scanning system; 4-collimation coupling system, 4-1-sixth meniscus lens, 4-2-seventh meniscus lens, 4-3-eighth meniscus lens; 5-Laser transceiver system. DETAILED DESCRIPTION The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1 like Figure 1 In this embodiment, an omnidirectional laser communication optical system is disclosed, including: a laser transceiver system 5, a collimation coupling system 4, a scanning system 3, a relay system 2 and a panoramic antenna system 1; The panoramic antenna system 1 for receiving optical signals with a large field of view and transmitting optical signals and the relay system 2 for focusing the laser are optically reversibly connected; The relay system 2 and the scanning system 3 for deflecting and scanning the collimated laser are optically reversibly connected; The scanning system 3 and the collimation coupling system 4 are optically reversibly connected; The collimation coupling system 4 and the laser transceiver system 5 are reversibly connected in optical path, so that the collimation coupling system 4 can collimate the laser output by the laser transceiver system 5 or couple the collimated laser to the laser transceiver system 5 .

[0026] Specifically: In this embodiment, the laser transceiver system 5 includes: a transmitting system for generating original laser light and a receiving system for receiving laser light; the transmitting system and the receiving system are connected via an optical circulator; like Figure 3 The transmitting system is located at the first port of the optical circulator, and the emitted 1550nm narrow line laser is emitted from the second port of the optical circulator; The receiving system is located at the third port of the optical circulator and receives the collimated laser signal at the second port, thus forming the same-aperture laser transceiver and reducing the overall volume of the system.

[0027] In addition, in this embodiment, the receiving system adopts an avalanche photodiode detector, which has high sensitivity. In this embodiment, the central wavelength of the optical circulator is 1550nm, the peak isolation is 50dB, the minimum isolation is 40dB, the maximum insertion loss is 0.8dB, the minimum crosstalk is 50dB, the minimum return loss is 45dB, and the operating temperature is -5ºC~+50ºC.

[0028] like Figure 1 In this embodiment, the function of the collimation coupling system 4 is to collimate the laser emitted by the transmitting system in the laser transceiver system 5, and the laser passing through the collimation coupling system 4 is emitted as approximately parallel light. During coupling, the parallel light emitted by the scanning system 3 is coupled to the target surface of the avalanche photodiode detector.

[0029] The collimating coupling system 4 is composed of a sixth meniscus lens 4-1, a seventh meniscus lens 4-2 and an eighth meniscus lens 4-3 which are optically connected in sequence and have gradually decreasing curvatures; Wherein, the sixth meniscus lens 4-1 is optically connected to the scanning system 3; The eighth meniscus lens 4-3 is optically connected to the laser transceiver system 5; The collimation coupling system 4 has a diameter of 50 mm.

[0030] Furthermore, in actual applications, the specific scanning mechanism of the scanning system 3 selects an adaptive scanning mechanism form from a swing mirror, a MEMS micro-actuated reflector, a liquid prism and other deflection mechanisms according to actual conditions. Different deflection mechanisms have different scanning angles and scanning speeds, and can be flexibly changed according to different usage scenarios. When changing, only the lens in the corresponding relay system 2 needs to be replaced.

[0031] Specifically, in this embodiment, taking the MEMS micro-actuated reflector as an example, when the scanning angle is 0°, the light is emitted from the center 0 field of view, and when the scanning angle is ±3.7°, the light is emitted from the ±70° field of view. Different scanning angles correspond to different output fields of view of the panoramic antenna system 1. In this embodiment, the scanning system 3 scans the parallel light passing through the collimation coupling system 4 to generate a specific angle to adapt to the relay system 2.

[0032] In this embodiment, the relay system 2 is composed of six spherical lenses, specifically a fourth meniscus lens 2-1, a second biconvex lens 2-2, a third biconvex lens 2-3, a fourth biconcave lens 2-4, a fifth meniscus lens 2-5, and a plano-concave lens 2-6 connected in sequence by optical paths; Wherein, the fourth biconcave lens 2-4 and the fifth meniscus lens 2-5 constitute a double cemented lens; The fourth meniscus lens 2-1 is optically connected to the panoramic antenna system 1; The plano-concave lens 2-6 is optically connected to the scanning system 3; At the same time, in this embodiment, the field of view of the relay system 2 is the field of view of the scanning system 3. In this embodiment, the relay system 2 plays a connecting role. Due to the working characteristics of the optical path to the front and rear systems: the panoramic antenna system 1 and the scanning system 3, the relay system 2 is required to achieve object-side telecentricity and image-side telecentricity. Therefore, in this embodiment, the image-side telecentricity of the relay system 2 is less than 0.01°. The entrance pupil diameter of the relay system 2 is 50 mm.

[0033] In this embodiment, the panoramic antenna system 1 includes a free-form surface reflector assembly 1-1, a biconcave lens 1-2, a first meniscus lens 1-3, a first biconvex lens 1-4, a second meniscus lens 1-5 and a third meniscus lens 1-6 which are optically connected in sequence; Wherein, the free-form surface reflector assembly 1-1 is connected with a plurality of transmitting terminal optical signals; The third meniscus lens 1-6 is optically connected to the relay system 2.

[0034] The free-form surface reflector assembly 1-1 specifically comprises two reflectors, both of which are free-form surface reflectors. The surface feature points of the two reflectors are calculated by a point-by-point calculation method, and the free-form surface coefficients are output after the surface fitting of the two reflectors. The design flow chart is as follows: Figure 4 shown.

[0035] In this embodiment, the field of view of the panoramic antenna system 1 is ±30° to ±70°, and the image plane size of the panoramic antenna system 1 is adapted to the image plane size of the relay system 2, specifically, the image height of the relay system 2 = the image height of the panoramic antenna system 1; The entrance pupil diameter of the panoramic antenna system 1 is 50 mm; the focal ratio F number is 1.5, the image height is 80 mm, and the focal length is 75 mm; In this embodiment, the panoramic antenna system 1 has a telecentricity characteristic, and the telecentricity is about 0.01°; like Figure 6 The MTF value of the panoramic antenna system is better than 0.5 at 120lp / mm.

[0036] The beam divergence angle of the omnidirectional laser communication optical system is 180μrad ~260μrad, corresponding to a communication distance of 1200km ~1000km.

[0037] Example 2 An omnidirectional laser communication optical method is implemented by applying the omnidirectional laser communication optical system of embodiment 1, and the method comprises: Figure 2Workflow as a transmitter and workflow as a receiver; Workflow as a launcher: The transmitting system of the laser transceiver system 5 emits laser light, and guides the laser light to the collimation coupling system 4 through the optical circulator; The emitted laser is collimated by the collimation coupling system 4 and becomes a parallel beam, and enters the scanning system 3; The deflection of the light beam is controlled by changing the deflection angle of the scanning system 3 so that the deflected light beam can cover a predetermined spatial area. After scanning, the laser beam is output to the relay system 2; The relay system 2 images the laser beam passing through the scanning system 3 on the imaging circle of the panoramic antenna system 1, and the output beam of the relay system 2 has been spatially distributed before it touches the panoramic antenna system, thereby realizing telecentric scanning of the image space with a large field of view; The panoramic antenna system 1 emits light at a beam divergence angle close to the diffraction limit so that the laser communication receiving terminal within the field of view can receive the light; Workflow as a receiving device: The panoramic antenna system 1 receives optical signals from multiple laser communication terminals; The panoramic antenna system 1 compresses the light beams from different fields of view and inputs them into the relay system 2; The relay system 2 sends the received light beam to the scanning system 3 for deflection and then to the collimation coupling system 4; The collimation coupling system 4 couples the light beam from the scanning system 3 to the laser transceiver system to complete the communication.

[0038] It should be noted that due to the reversibility of the optical path, the panoramic antenna system 1 also has the same emission angle. When working, if the field of view permits, there are one or more laser communication transmitting terminals and one or more laser communication receiving terminals to perform different networking modes.

[0039] Specifically: like Figure 5 Step 1: Place the laser communication transmitting terminal and the laser communication receiving terminal at the places where communication is required according to the actual application scenario, and adjust the respective antenna systems for transmitting and receiving optical signals: panoramic antenna system 1; When used as a transmitting device, it is ensured that the laser emitted by each panoramic antenna system 1 covers all laser communication receiving terminals.

[0040] When used as a receiving device, ensure that the field of view of each panoramic antenna system 1 can be aligned with all laser communication transmitting terminals. In specific operations, first turn on the power, observe the laser spot emitted by the laser communication transmitting terminal through the charge coupled device / image controller (hereinafter referred to as CCD camera) in the laser communication receiving terminal, and adjust the panoramic antenna system 1 so that the panoramic antenna system 1 and the laser spot are coaxially aligned until the laser spots emitted by all laser communication transmitting terminals can be clearly seen in the CCD camera of the laser communication receiving terminal. After the adjustment is completed, fix the position of the panoramic antenna system 1, and there is no need to adjust it again before each communication. Step 2: At the laser communication transmitting end, the information to be sent is connected to the corresponding user input port through the input interface unit to prepare for sending data.

[0041] Step 3: At the laser communication receiving end, connect the output lead of the user receiving information to the multi-user output interface unit of the laser communication receiving end to ensure that the information can be output in a predetermined order from the light spot position displayed by the CCD camera of the laser communication receiving terminal. If multiple user information is received, the signal is output in the order from top to bottom and from left to right of the light spot in the CCD camera. In actual use, the wiring configuration can be adjusted according to the user's communication needs. Step 4: Turn on the power of all devices to be communicated, the whole system will automatically enter the working state, and the communicating two or more parties will start data communication.

[0042] It should be noted that compared with other laser communication terminal optical path forms, under the condition of the same effective optical aperture, this technical solution has a wider communication range, smaller size and lighter weight, and has obvious technical advantages.

[0043] like Figure 4 This embodiment also includes: a free-form surface calculation process in a free-form surface reflection component, specifically including: Determine the initial impact point Coordinates and angles between incident / outgoing light and the optical axis; Define the surface , Initial point coordinates, calculate the incident point and the unit vector ; Calculate point by point to construct a free-form surface point cloud map; Gradually expand the aperture D and increase the number of characteristic light lines in each field of view; Determine whether the aperture D reaches 50mm; if so, output the free-form surface point cloud; if not, gradually expand the aperture D and increase the number of characteristic light lines in each field of view until the aperture D reaches 50mm.

[0044] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An omnidirectional laser communication optical system, characterized in that: include: Laser transceiver system (5), collimation coupling system (4), scanning system (3), relay system (2) and panoramic antenna system (1); A panoramic antenna system (1) for receiving optical signals with a large field of view and transmitting optical signals and a relay system (2) for focusing laser light are reversibly connected in optical paths; The relay system (2) and the scanning system (3) for deflecting and scanning the collimated laser are reversibly connected in optical path; The scanning system (3) and the collimation coupling system (4) are reversibly connected in optical path; The collimation coupling system (4) and the laser transceiver system (5) are reversibly connected in optical path, so that the collimation coupling system (4) collimates the laser output by the laser transceiver system (5) or couples the collimated laser to the laser transceiver system (5).

2. The omnidirectional laser communication optical system according to claim 1, characterized in that: The laser transceiver system (5) comprises: a transmitting system for generating original laser light and a receiving system for receiving laser light; the transmitting system and the receiving system are connected via an optical circulator; The transmitting system is located at the first port of the optical circulator, and the emitted 1550nm narrow line laser is emitted from the second port of the optical circulator; The receiving system is located at the third port of the optical circulator and receives the collimated laser signal at the second port to form the same-aperture laser transmission and reception.

3. The omnidirectional laser communication optical system according to claim 1, characterized in that: The collimating coupling system (4) is composed of a sixth meniscus lens (4-1), a seventh meniscus lens (4-2), and an eighth meniscus lens (4-3) which are optically connected in sequence and have gradually decreasing curvatures; Wherein, the sixth meniscus lens (4-1) is optically connected to the scanning system (3); The eighth meniscus lens (4-3) is optically connected to the laser transceiver system (5); The collimation coupling system (4) has a diameter of 50 mm.

4. The omnidirectional laser communication optical system according to claim 1, characterized in that: The relay system (2) is composed of six spherical lenses, specifically a fourth meniscus lens (2-1), a second biconvex lens (2-2), a third biconvex lens (2-3), a fourth biconcave lens (2-4), a fifth meniscus lens (2-5), and a plano-concave lens (2-6) which are optically connected in sequence; The fourth biconcave lens (2-4) and the fifth meniscus lens (2-5) form a double cemented lens; The fourth meniscus lens (2-1) is optically connected to the panoramic antenna system (1); The plano-concave lens (2-6) and the scanning system (3) are optically connected.

5. The omnidirectional laser communication optical system according to claim 1, characterized in that: The panoramic antenna system (1) comprises a free-form surface reflector assembly (1-1), a double concave lens (1-2), a first meniscus lens (1-3), a first double convex lens (1-4), a second meniscus lens (1-5) and a third meniscus lens (1-6) which are optically connected in sequence; Wherein, the free-form surface reflector assembly (1-1) is connected to a plurality of transmitting terminal optical signals; The third meniscus lens (1-6) is optically connected to the relay system (2).

6. The omnidirectional laser communication optical system according to claim 4, characterized in that: The entrance pupil diameter of the relay system (2) is 50 mm.

7. The omnidirectional laser communication optical system according to claim 5, characterized in that: The panoramic antenna system (1) has a field of view of ±30° to ±70°; The entrance pupil diameter of the panoramic antenna system (1) is 50 mm; the focal ratio F number is 1.5, the image height is 80 mm, and the focal length is 75 mm.

8. An omnidirectional laser communication optical method, characterized in that: The omnidirectional laser communication optical system according to any one of claims 1 to 7 is used to implement the method, and the method includes: a working process as a transmitting device and a working process as a receiving device; Workflow as a launcher: A laser transceiver system (5) is used to emit laser light; The emitted laser light is collimated by the collimation coupling system (4) and then enters the scanning system (3); By changing the deflection angle of the scanning system (3), the light beam is deflected and output to the relay system (2); The relay system (2) images the laser beam passing through the scanning system (3) on the panoramic antenna system (1); The panoramic antenna system (1) emits light at a nearly diffraction-limited beam angle; Workflow as a receiving device: The panoramic antenna system (1) receives optical signals from a plurality of laser communication terminals; The panoramic antenna system (1) compresses the light beams from different fields of view and inputs them into the relay system (2); The relay system (2) sends the received light beam to the scanning system (3) for deflection and then sends it to the collimation coupling system (4); The collimation coupling system (4) couples the light beam from the scanning system (3) to the laser transceiver system to complete the communication.

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