Miniaturized receiving and transmitting integrated free space optical communication system

Abstract

The invention discloses a miniaturized receiving and transmitting integrated free space optical communication system, which comprises an optical signal output module used for transmitting emergent light; the optical signal input module comprises a four-quadrant detector and a photoelectric conversion unit, is used for detecting incident light in parallel to obtain electric signals of four quadrants, and is also used for performing amplification and photoelectric conversion on the incident light and outputting a first electric signal; the signal processing and transmitting module is used for processing the electric signals of the four quadrants and the first electric signal when the system is a receiving end, and outputting the mass center offset of the MEMS galvanometer and received data; the signal processing transmission module is used for processing sent data to obtain an analog-to-digital sending signal when the system is a sending end, and transmitting the analog-to-digital sending signal to the optical modulator for electro-optical conversion; the MEMS galvanometer is used for self-adjusting a deflection angle according to the mass center offset so as to align the incident light with the signal input module; according to the invention, miniaturization of a free space optical communication system is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of free-space optical communication, and in particular relates to a miniaturized transceiver-integrated free-space optical communication system. Background Art

[0002] With the continuous improvement of the integration of UAV platforms, the current development trend of UAVs is towards miniaturization, micro-miniaturization, intelligence, and clustering. The current micro-unmanned platforms have put forward higher requirements on the size, weight, and cost of the detection and perception, free-space optical communication systems they carry. Free-space optical (FSO) communication technology uses light waves as information carriers. It establishes a communication link by modulating the amplitude, phase, and frequency of the output optical signal in various ways. At the receiving end, these physical properties are detected and demodulated to complete information transmission. Compared to traditional radio frequency (RF) communication methods, FSO communication technology operates in the unlicensed terahertz spectrum, boasting an operating bandwidth several orders of magnitude higher than RF communication and offering advantages such as strong resistance to electromagnetic interference.

[0003] Currently, free-space optical communication technology has been widely used in air-to-air, ground-to-air, and space communications. However, due to the effects of atmospheric turbulence and absorption on signal light, existing FSO communication systems require traditional APT (Acquisition Pointing and Tracking) systems with separate coarse and fine alignment structures. This leads to issues such as large size, weight, and high cost. In practical applications, medium-to-large aircraft and ground vehicle-mounted systems are not sensitive to parameters such as the size and weight of free-space optical communication systems. However, in the application scenarios of small or micro unmanned platforms, the payload limitations of the unmanned platforms place very high demands on the weight and size of the communication systems. Current discrete free-space optical communication systems are difficult to meet the payload requirements of UAV platforms. Summary of the Invention

[0004] The purpose of the present invention is to provide a miniaturized free-space optical communication system with integrated transceiver, which can realize the miniaturization of the free-space optical communication system through an optical signal output module, a signal processing and transmission module, an optical signal input module and a MEMS galvanometer, and meet the requirements of miniature unmanned platforms for miniaturization, lightweight and low cost.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides a miniaturized free-space optical communication system integrating transmission and reception, comprising: an optical signal output module, a signal processing and transmission module, an optical signal input module and a MEMS galvanometer; The optical signal output module includes a laser, an optical modulator, an optical amplifier and a coupler connected in sequence, and is used to transmit output light; The optical signal input module includes a four-quadrant detector and a photoelectric conversion unit; the four-quadrant detector is used to receive incident light reflected from the MEMS galvanometer and detect it to obtain electrical signals in four quadrants; the photoelectric conversion unit includes an optical amplifier and an APD detector connected in sequence, and is used to receive the incident light reflected from the MEMS galvanometer, amplify it, and perform photoelectric conversion to output a first electrical signal; The signal processing and transmission module is connected to the optical signal input module and is used to process the electrical signals of the four quadrants and the first electrical signal when the free space optical communication system is a receiving end, and output the centroid offset of the MEMS galvanometer and the received data; The signal processing and transmission module is connected to the optical signal output module and is used to process the transmitted data to obtain an analog electrical transmission signal when the free space optical communication system is a transmitting end, and transmit it to the optical modulator for electrical-optical conversion; The MEMS galvanometer is used to adjust its deflection angle according to the center of mass offset so that the incident light and the signal input module are aligned, and is also used for the transmission of the incident light and the outgoing light.

[0006] Optionally, the signal processing and transmission module includes a micro control unit, a signal processing unit connected to the micro control unit, and a driving unit for supplying power to the free space optical communication system.

[0007] Optionally, the micro control unit includes a first processing subunit and a second processing subunit; When the free-space optical communication system serves as a receiving end, the first processing subunit is configured to digitally process the analog electrical signal to obtain a processed electrical signal, and convert the processed electrical signal into received data through a specified encoding; when the free-space optical communication system serves as a transmitting end, the first processing subunit is configured to compress, package, and encode the transmitted data to obtain a digital pulse signal; The second processing sub-unit is used to calculate the offset of the electrical signals of the four quadrants, obtain the center of mass offset, and transmit it to the MEMS galvanometer.

[0008] Optionally, the signal processing unit includes a transimpedance amplifier, a noise reduction unit and a digital-to-analog conversion unit; when the free-space optical communication system is a receiving end, the signal processing unit is used to amplify, reduce noise and perform digital-to-analog conversion on the first electrical signal to obtain an analog-to-electrical signal; when the free-space optical communication system is a transmitting end, the signal processing unit is used to amplify, reduce noise and perform digital-to-analog conversion on the digital pulse signal to obtain an analog-to-electrical transmitting signal.

[0009] Optionally, the optical modulator, optical amplifier and coupler in the optical signal output module, and the optical signal input module are integrated on the same silicon-based substrate through silicon-based optoelectronic integration technology and heterogeneous heterogeneous integration technology to obtain a photonic integrated chip.

[0010] Optionally, the micro control unit, signal processing unit and driving unit in the signal processing and transmission module are integrated based on SiP packaging technology to obtain an electronic micro system chip.

[0011] Optionally, the electronic microsystem chip further integrates a plurality of IO ports for transmitting and receiving signals of the signal processing transmission module.

[0012] Optionally, the optical amplifier is an erbium-doped waveguide optical amplifier.

[0013] Optionally, the free-space optical communication system further includes an optical lens group, which is arranged on one side of the MEMS galvanometer mirror and is used to geometrically amplify the outgoing light reflected by the MEMS galvanometer mirror to increase the scanning angle range of the MEMS galvanometer mirror.

[0014] Optionally, the free-space optical communication system further includes an optical system component, which includes a lens, a beam splitter and a reflector, and is used to focus, shape, distribute energy and control the direction of incident light and outgoing light.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a miniaturized, integrated transceiver free-space optical communication system, which includes an optical signal output module, a signal processing and transmission module, an optical signal input module, and a MEMS galvanometer. Compared to the APT system provided in existing free-space optical communication systems, the MEMS galvanometer in the present invention cooperates with the optical signal output module, the signal processing and transmission module, and the optical signal input module. While achieving integrated communication transceiver, the system can be smaller, lighter, and less expensive, meeting the requirements of miniature unmanned platforms for miniaturization, lightness, and low cost. When the free-space optical communication system acts as the transmitter, the signal processing and transmission module processes the transmitted data to obtain an analog-to-electrical transmission signal, and transmits it to the optical modulator of the optical signal output module for electro-optical conversion. In conjunction with other components of the optical signal output module, the module transmits outgoing light and combines with the MEMS galvanometer for reflection, and then sends the optical signal to another receiving end. When the free-space optical communication system serves as the receiving end, the incident light is reflected by the MEMS galvanometer and input into the four-quadrant detector of the optical signal input module and the photoelectric conversion unit. On the one hand, the four-quadrant detector outputs four quadrants of electrical signals to the signal processing and transmission module for processing, thereby adjusting the angle of the MEMS galvanometer so that the incident light and the signal input module are aligned; on the other hand, the photoelectric conversion unit outputs a first electrical signal to the signal processing and transmission module for processing to obtain the received data.

[0016] The present invention provides a miniaturized, all-in-one free-space optical communication system with both transceiver and transmitter. The optical modulator, optical amplifier, and coupler in the optical signal output module, as well as the four-quadrant detector and photoelectric conversion unit in the optical signal input module, are integrated on the same silicon-based substrate using silicon-based optoelectronic integration technology and heterogeneous heterogeneous integration technology to form a photonic integrated chip. This significantly reduces the volume, weight, and cost of the free-space optical communication system, achieving a miniaturized and lightweight design.

[0017] The present invention provides a miniaturized free-space optical communication system with integrated transceiver functionality, in which a microcontroller unit, a signal processing unit, and a driver unit in a signal processing and transmission module are integrated based on SiP packaging technology to form an electronic microsystem chip, further reducing the volume, weight, and cost of the free-space optical communication system of the present invention.

[0018] The present invention provides a miniaturized free-space optical communication system with integrated transceiver functionality, in which a microcontroller unit, a signal processing unit, and a driver unit in a signal processing and transmission module are integrated based on SiP packaging technology to form an electronic microsystem chip, further reducing the volume, weight, and cost of the free-space optical communication system of the present invention.

[0019] The present invention provides a miniaturized, integrated transceiver free-space optical communication system. In this system, the optical amplifier in the optical signal output module uses an erbium-doped waveguide amplifier (EDWA), eliminating the need for an external discrete erbium-doped fiber amplifier (EDFA), thereby reducing system size. Furthermore, the optical amplification efficiency of the EDWA is approximately twice that of the EDFA, thereby reducing system power consumption.

[0020] The present invention provides a miniaturized all-in-one free-space optical communication system that transmits and receives light. The system also includes an optical lens group and an optical system component. The optical lens group can geometrically amplify the outgoing light reflected by the MEMS galvanometer mirror, thereby increasing the scanning angle range of the MEMS galvanometer mirror. The optical system component includes a lens, a beam splitter, and a reflector, and can focus, shape, distribute energy, and control the direction of the incident and outgoing light, thereby facilitating light transmission in the free-space optical communication system. The position of the optical system component is determined by those skilled in the art based on the position of the modules in the free-space optical communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG2 is a schematic structural diagram of a miniaturized transceiver-integrated free-space optical communication system in Example 1 of the present invention; Figure 2 FIG2 is a schematic structural diagram of a signal processing and transmission module in an embodiment of the present invention; Figure 3 FIG2 is a schematic structural diagram of a miniaturized transceiver-integrated free-space optical communication system in Example 2 of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1 As shown, the embodiment of the present invention introduces a miniaturized transceiver-integrated free-space optical communication system, including: Optical signal output module, signal processing and transmission module, optical signal input module and MEMS galvanometer; The optical signal output module includes a laser, an optical modulator, an optical amplifier and a coupler connected in sequence, and is used to transmit the output light; The optical signal input module includes a four-quadrant detector and a photoelectric conversion unit; the four-quadrant detector is used to receive incident light reflected from the MEMS galvanometer and detect it to obtain electrical signals in four quadrants; the photoelectric conversion unit includes an optical amplifier and an APD detector connected in sequence, which is used to receive the incident light reflected from the MEMS galvanometer, amplify it, and perform photoelectric conversion to output a first electrical signal; The signal processing and transmission module is connected to the optical signal input module and is used to process the electrical signals of the four quadrants and the first electrical signal when the free space optical communication system is a receiving end, and output the center of mass offset of the MEMS galvanometer and the received data; The signal processing and transmission module is connected to the optical signal output module and is used to process the transmitted data to obtain an analog electrical transmission signal when the free space optical communication system is the transmitting end, and transmit it to the optical modulator for electrical-optical conversion; The MEMS galvanometer is used to adjust its deflection angle according to the center of mass offset so that the incident light and the signal input module are aligned, and is also used for the transmission of incident light and outgoing light.

[0028] Specifically, the miniaturized transceiver-in-one free-space optical communication system mentioned in this embodiment further includes an optical lens group and an optical system component; the optical lens group is an optical system composed of two or more lenses combined in a specific manner, and in this embodiment is configured to be a combination of two lenses; the optical lens group is arranged on one side of the MEMS galvanometer, and is used to geometrically amplify the outgoing light reflected by the MEMS galvanometer, thereby increasing the scanning angle range of the MEMS galvanometer; the optical system component includes a lens, a beam splitter and a reflector, and is used to focus, shape, distribute energy and control the direction of the incident light and the outgoing light; in this embodiment, Figure 1As shown, three lenses are respectively arranged on the output side of the optical signal output module, the input side of the four-quadrant detector and the input side of the photoelectric conversion unit; a reflector is arranged at a specific position between the MEMS galvanometer and the optical signal output module, and is used to reflect the light passing through the lens on the output side of the optical signal output module to the MEMS galvanometer; two beam splitters are arranged on the optical path from the MEMS galvanometer to the reflector, and are used to transmit the incident light transmitted through the MEMS galvanometer to the lens on the input side of the four-quadrant detector and the lens on the input side of the photoelectric conversion unit, respectively.

[0029] In this embodiment, the input end of the optical modulator in the optical signal output module utilizes end-face coupling technology, interconnected with the laser via a lens or direct coupling, and transmits the optical signal output by the laser to the optical modulator. The laser utilizes a DFB laser light source with a wavelength of 1550 nm. The optical modulator is controlled by the signal processing and transmission module, and intensity modulates the optical signal output by the laser by receiving the analog electrical transmission signal from the signal processing and transmission module. The optical amplifier is used to amplify the output light, amplifying the weak optical signal output by the optical modulator to the power required for spatial light propagation. The optical amplifier utilizes an erbium-doped waveguide optical amplifier. The coupler achieves low-loss coupling with the external optical system (lens) (using end-face lens coupling).

[0030] In this embodiment, if Figure 2 As shown, the signal processing and transmission module includes a microcontroller unit, a signal processing unit connected to the microcontroller unit, and a driving unit for powering the free-space optical communication system. The green line in the figure represents the signal processing and transmission module's processing flow for the first electrical signal output by the photoelectric conversion unit when the free-space optical communication system serves as the receiving end. The blue line represents the signal processing and transmission module's processing flow for the electrical signals of the four quadrants output by the four-quadrant detector when the free-space optical communication system serves as the receiving end. In the figure, V2 represents the electrical signals of the four quadrants, and V1 represents the first electrical signal. Specifically, the micro control unit includes a first processing subunit and a second processing subunit; When the free space optical communication system is used as the receiving end, you can refer to Figure 2 The green line in the figure is the first processing sub-unit, which is used to digitally process the analog electrical signal V4 to obtain a processed electrical signal, and convert the processed electrical signal into received data V5 through a specified encoding. When the free space optical communication system is used as the transmitting end, reference can be made to Figure 2 The red line in the figure is the first processing sub-unit, which is used to compress, package and encode the transmitted data V6 to obtain a digital pulse signal V7; When the free space optical communication system is used as the receiving end, you can refer to Figure 2The blue line in the figure is the second processing sub-unit, which is used to calculate the offset of the electrical signal V2 of the four quadrants, obtain the center of mass offset V3, and transmit it to the MEMS galvanometer.

[0031] Among them, the signal processing unit includes a transimpedance amplifier, a noise reduction unit and a digital-to-analog conversion unit; when the free-space optical communication system is the receiving end, the signal processing unit is used to amplify, reduce noise and perform digital-to-analog conversion on the first electrical signal V1 to obtain an analog-to-electrical signal V4; when the free-space optical communication system is the transmitting end, the signal processing unit is used to amplify, reduce noise and perform digital-to-analog conversion on the digital pulse signal V7 to obtain an analog-to-electrical transmitting signal V8.

[0032] Specifically, the first processing sub-unit may be a digital signal processor (DSP) or a field programmable gate array (FPGA); Specifically, the functions of the microcontroller unit in the system of the present invention mainly include two parts: (1) data processing and algorithm implementation in the alignment system (MEMS galvanometer combined with four-quadrant detector), which is implemented by the second processing unit in this embodiment; (2) signal encoding and signal decoding processing during transmission and reception, which is implemented by the first processing unit in this embodiment; wherein, when the system of the present invention is used as a receiving end, the energy distribution of the target light spot falling on the photosensitive surface of the QD (four-quadrant detector) is approximately a circular Gaussian distribution, and a direct addition and subtraction algorithm is used to detect and solve the center of mass position of the light spot. The basic principle of the addition and subtraction algorithm is to use the current signal generated by the quadrants of the four-quadrant detector located on the left and right of the y-axis to solve the offset of the target light spot along the x-axis. σ x , using the current signals generated by the quadrants above and below the x-axis to calculate the offset of the y-axis σ y , the offset formula is as follows: ; ; in, They respectively represent the current electrical signals of the four quadrants output by the four-quadrant detector; the A, B, C, and D quadrants of the four-quadrant detector are distributed symmetrically with the center, and the quadrant arrangement is consistent with the mathematical coordinate system.

[0033] In this embodiment, the MEMS galvanometer, the four-quadrant detector in the optical signal input module, and the microcontroller cooperate to align the incident light with the QD and the photoelectric conversion unit. The microcontroller adjusts the MEMS galvanometer's attitude angle based on the four-quadrant electrical signals output by the QD, so that the midpoint of the incident light falls on the center of the QD and the APD detector in the photoelectric conversion unit. This improves the system's signal-to-noise ratio and reduces the communication bit error rate, thereby improving the accuracy of transmission and reception. Furthermore, the system replaces the traditional APT system with separate coarse and fine alignment structures in existing space optical communication systems, making it smaller and lighter, and capable of being carried on current micro-unmanned platforms. Among them, the traditional APT system uses discrete components, which requires each component to have packaging, housing, heat dissipation and other parts. The integrated chips are all made together, which is costly. This embodiment can meet the usage requirements with one packaging, one housing, and one heat dissipation set, which is lower in cost.

[0034] In this embodiment, the optical modulator may be an electro-absorption intensity modulator or a silicon-based Mach-Zehnder optical modulator, and the light source and the modulator are coupled using an end-face bonding process.

[0035] In this embodiment, the APD detector (Avalanche Photodiod) meets the requirements of high-speed communication and small signal amplification.

[0036] In this embodiment, the MEMS galvanometer uses a dual-axis quasi-static MEMS galvanometer, which can realize a dual-axis quasi-static working mode and simultaneously meet the functions of fast large-scale scanning and capture, small-scale precise alignment and static communication.

[0037] Example 2

[0038] Based on the miniaturized transceiver integrated free-space optical communication system introduced in Example 1, the transceiver integrated free-space optical communication system is further integrated to obtain the miniaturized transceiver integrated free-space optical communication system of this embodiment, such as Figure 3 As shown; Figure 3 In the figure, MCU stands for microprocessor unit; SOA stands for optical amplifier; QD and APD stand for quadrant detector and APD detector respectively; Specifically, in this embodiment, the optical modulator, optical amplifier and coupler in the optical signal output module, and the optical signal input module are integrated using silicon-based optoelectronic integration technology and heterogeneous heterogeneous integration technology to obtain a photonic integrated chip; the microcontroller unit, signal processing unit and driving unit in the signal processing and transmission module and several IO ports are integrated using SiP packaging technology to obtain an electronic microsystem chip.

[0039] Specifically, the photonic integrated chip is interconnected with the laser die via end-face coupling. The laser light source has an output center wavelength of 1550nm and an output power of 100mW. This wavelength is within the atmospheric absorption window, resulting in extremely low atmospheric absorption attenuation during link transmission, which reduces the sensitivity requirements of the photodetector at the receiving end. Furthermore, this wavelength is far from the visible light band, offering advantages such as high eye safety and good concealment.

[0040] In summary, the miniaturized all-in-one free-space optical communication system of this embodiment replaces discrete optical modulators, optical amplifiers, and optical detectors in traditional FSO communication systems with photonic integrated chips. It uses SiP packaging technology to form an electronic microsystem chip to reduce circuit size. It uses a MEMS galvanometer to replace the traditional APT (Acquisition Pointing and Tracking) system with separate coarse and fine alignment structures. By combining silicon-based optoelectronics, SiP packaging, and silicon MOEMS technology, it greatly reduces the size, weight, and cost of traditional laser communication systems, meeting the miniaturization, lightweight, and low-cost requirements of micro-unmanned platforms.

[0041] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all protected by the present invention.

Claims

1. A miniaturized transceiver-integrated free-space optical communication system, characterized in that: include: Optical signal output module, signal processing and transmission module, optical signal input module and MEMS galvanometer; The optical signal output module includes a laser, an optical modulator, an optical amplifier and a coupler connected in sequence, and is used to transmit output light; The optical signal input module includes a four-quadrant detector and a photoelectric conversion unit; the four-quadrant detector is used to receive the incident light reflected from the MEMS galvanometer and detect it to obtain electrical signals in four quadrants; The photoelectric conversion unit includes an optical amplifier and an APD detector connected in sequence, and is used to receive incident light reflected from the MEMS galvanometer, amplify and photoelectrically convert it, and output a first electrical signal; The signal processing and transmission module is connected to the optical signal input module and is used to process the electrical signals of the four quadrants and the first electrical signal when the free space optical communication system is a receiving end, and output the centroid offset of the MEMS galvanometer and the received data; The signal processing and transmission module is connected to the optical signal output module and is used to process the transmitted data to obtain an analog electrical transmission signal when the free space optical communication system is a transmitting end, and transmit it to the optical modulator for electrical-optical conversion; The MEMS galvanometer is used to adjust its deflection angle according to the center of mass offset so that the incident light and the signal input module are aligned, and is also used for the transmission of the incident light and the outgoing light.

2. The miniaturized transceiver-integrated free-space optical communication system according to claim 1, wherein: The signal processing and transmission module includes a micro control unit, a signal processing unit connected to the micro control unit, and a driving unit for supplying power to the free space optical communication system.

3. The miniaturized integrated transceiver free-space optical communication system according to claim 2, characterized in that: The micro control unit includes a first processing subunit and a second processing subunit; When the free-space optical communication system serves as a receiving end, the first processing subunit is configured to digitally process the analog electrical signal to obtain a processed electrical signal, and convert the processed electrical signal into received data through a specified encoding; when the free-space optical communication system serves as a transmitting end, the first processing subunit is configured to compress, package, and encode the transmitted data to obtain a digital pulse signal; The second processing sub-unit is used to calculate the offset of the electrical signals of the four quadrants, obtain the center of mass offset, and transmit it to the MEMS galvanometer.

4. The miniaturized transceiver-integrated free-space optical communication system according to claim 3, wherein: The signal processing unit includes a transimpedance amplifier, a noise reduction unit, and a digital-to-analog conversion unit. When the free-space optical communication system is a receiving end, the signal processing unit is used to amplify, reduce noise, and perform digital-to-analog conversion on the first electrical signal to obtain an analog-to-electrical signal. When the free-space optical communication system is a transmitting end, the signal processing unit is used to amplify, reduce noise, and perform digital-to-analog conversion on the digital pulse signal to obtain an analog-to-electrical transmitting signal.

5. The miniaturized transceiver-integrated free-space optical communication system according to claim 1, wherein: The optical modulator, optical amplifier and coupler in the optical signal output module and the optical signal input module are integrated on the same silicon-based substrate through silicon-based optoelectronic integration technology and heterogeneous heterogeneous integration technology to obtain a photonic integrated chip.

6. The miniaturized integrated transceiver free-space optical communication system according to claim 2, characterized in that: The micro control unit, signal processing unit and driving unit in the signal processing and transmission module are integrated based on SiP packaging technology to obtain an electronic micro system chip.

7. The miniaturized integrated transceiver free-space optical communication system according to claim 6, characterized in that: The electronic microsystem chip also integrates several IO ports for sending and receiving signals of the signal processing transmission module.

8. The miniaturized integrated transceiver free-space optical communication system according to claim 1, characterized in that: The optical amplifier is an erbium-doped waveguide optical amplifier.

9. The miniaturized integrated transceiver free-space optical communication system according to claim 1, characterized in that: The free space optical communication system further comprises an optical lens group, which is arranged on one side of the MEMS galvanometer mirror and is used to geometrically amplify the outgoing light reflected by the MEMS galvanometer mirror to increase the scanning angle range of the MEMS galvanometer mirror.

10. The miniaturized transceiver-integrated free-space optical communication system according to claim 1, characterized in that: The free-space optical communication system further comprises an optical system component, which comprises a lens, a beam splitter and a reflector, and is used to perform focusing shaping, energy distribution and direction control on the incident light and the outgoing light.

Images