Optoelectronic fusion integrated device and method based on optical waveguide silicon-based optical phased array

Abstract

The application relates to the technical field of space laser communication, in particular to an optoelectronic fusion integrated device and method based on an optical waveguide silicon-based optical phased array (OPA), which comprises an FPGA comprehensive processing module, a laser driver, a laser generator, an OPA antenna, an OPA driving circuit, a CCD / CMOS sensor, a CCD / CMOS control circuit, a signal amplifier and a DDR3 storage chip, the above units are integrated on the same PCB board, the FPGA comprehensive processing module is connected with the OPA driving circuit, the DDR3 storage chip, the laser driver, the signal amplifier and the CCD / CMOS control circuit respectively, the laser generator is connected with the laser driver, the OPA antenna is connected with the laser generator and the OPA driving circuit respectively, and the CCD / CMOS sensor is connected with the signal amplifier and the CCD / CMOS control circuit respectively; the device has extremely high integration, has the advantages of miniaturization and light weight, has extremely strong flexibility, and signal processing and image processing software can be customized or reconstructed according to actual requirements.

Description

Technical Field

[0001] This invention relates to the field of space laser communication technology, and in particular to an optoelectronic fusion integrated device and method based on a silicon-based optical phased array with an optical waveguide. Background Technology

[0002] Optical phased array technology features fast response speed, high pointing accuracy, small size, light weight, and high integration. Compared with traditional microwave communication, it has advantages such as high bandwidth, low noise, high security, and resistance to electromagnetic interference. It has broad application prospects in fields such as space laser communication and solid-state lidar.

[0003] Currently, most space laser communication systems adopt optical antennas, PAT coarse and fine composite axis servo turntables, and designs based on ARM chips and ASIC integrated circuits. This approach includes optical components, servo motors, piezoelectric fast reflectors, and other devices, which makes it difficult to achieve high integration, lightweight design, and software reconfigurability, and still has significant limitations.

[0004] Therefore, how to achieve high integration, lightweight design, and reusable software in space laser systems has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an optoelectronic fusion integrated device and method based on silicon-based optical phased arrays with optical waveguides, which solves the problems of existing space laser communication systems being unable to achieve high integration, lightweight design and software reconfigurability.

[0006] To achieve the above objectives, the present invention provides an optoelectronic fusion integrated device based on a silicon-based optical phased array in an optical waveguide, comprising an FPGA integrated processing module, a laser driver, a laser generator, an OPA antenna, an OPA driving circuit, a CCD / CMOS sensor, a CCD / CMOS control circuit, a signal amplifier, and a DDR3 memory chip. All of the above units are integrated on the same PCB board. The FPGA integrated processing module is connected to the OPA driving circuit, the DDR3 memory chip, the laser driver, the signal amplifier, and the CCD / CMOS control circuit, respectively. The laser generator is connected to the laser driver. The OPA antenna is connected to both the laser generator and the OPA driving circuit, respectively. The CCD / CMOS sensor is connected to both the signal amplifier and the CCD / CMOS control circuit, respectively.

[0007] The FPGA integrated processing module is used for signal processing, including signal modulation and demodulation, signal winding and descrambling, signal serial-to-parallel conversion and communication bit error rate monitoring; image processing, including spot image acquisition, spot image buffering, image grayscale processing and spot centroid detection; optical phased array beam pointing control; and customized and reconstructed software according to engineering requirements.

[0008] The OPA driving circuit is used to receive the OPA antenna phase modulation voltage sent by the FPGA integrated processing module and send it to the OPA antenna phase shifter array to control the OPA antenna to deflect the emitted signal beam to a preset position.

[0009] The OPA antenna is used to emit a signal beam and deflect it to a preset position, and the direction control of the signal beam is realized in combination with the OPA driving circuit.

[0010] The laser driver is used to receive the laser modulation signal sent by the FPGA integrated processing module and control the laser generator to generate the corresponding signal beam.

[0011] The laser generator is used to generate a seed laser source, which, in conjunction with the laser driver, generates a modulated signal beam.

[0012] The CCD / CMOS sensor is used to receive the signal beam, acquire the image of the signal beam spot, and convert it into an electrical signal;

[0013] The signal amplifier is used to amplify the electrical signal received from the CCD / CMOS sensor and transmit it to the FPGA integrated processing module.

[0014] The CCD / CMOS control circuit is used to transmit the control signals issued by the FPGA integrated processing module to the CCD / CMOS sensor to control its exposure time, grayscale threshold parameters and working status.

[0015] The DDR3 memory chip is used to cache the CCD / CMOS image signals acquired by the FPGA integrated processing module, cache the real-time data stream, and feed it back to the FPGA integrated processing module in the form of a complete image.

[0016] The optoelectronic fusion integrated device based on optical waveguide silicon-based optical phased array also includes a user interface, which is connected to the FPGA integrated processing module.

[0017] The user interface is used to provide a data exchange interface to transmit user data to the FPGA integrated processing module.

[0018] The optoelectronic fusion integrated device based on optical waveguide silicon-based optical phased array also includes a power interface;

[0019] The power interface is used to process the input voltage and convert it into the rated operating voltage of each device, which is then input to each device through the printed circuit board on the PCB.

[0020] The FPGA integrated processing module includes a signal processing unit and an image processing unit.

[0021] The signal processing unit is used to perform modulation and demodulation, code-wrapping and decoding, inter-frame matching, serial-to-parallel conversion processing on the transmitted and received signals, and to monitor the communication bit error rate in real time during the communication process.

[0022] The image processing unit is used to acquire spot images from the CCD / CMOS sensor, perform image buffering, image grayscale processing, and spot centroid detection on the acquired signal beam spot images, and extract the modulation signal of the received signal beam based on the FPGA timing signal and the corresponding spot image features.

[0023] The FPGA integrated processing module also includes a laser drive control unit and an OPA beam pointing control unit;

[0024] The laser drive control unit is used to send the laser modulation signal to the laser driver, and control the laser generator to generate the corresponding signal beam through the laser driver; the OPA beam pointing control unit is used to send the phase modulation voltage of each channel of the phase shifter array in the OPA antenna to the OPA antenna phase shifter array through the OPA drive circuit, and control the OPA antenna to deflect the emitted signal beam to a preset position.

[0025] The optoelectronic fusion integration method based on silicon-based optical phased arrays with optical waveguides includes the following steps:

[0026] Initialization: Perform phase calibration on each channel of the optical phased array and initialize each module;

[0027] Alignment: The FPGA integrated processing module transmits the preset communication terminal position coordinates to the OPA beam pointing control unit. The OPA beam pointing control unit sends the phase modulation voltage of each channel of the phase shifter array in the OPA antenna to the OPA antenna phase shifter array through the OPA driving circuit, and controls the OPA antenna to deflect the emitted signal beam toward the preset communication terminal position, so that the signal beam enters the preset communication terminal. The preset communication terminal receives the signal beam emitted by its own device, and the signal beam emitted by its own device is also received by the CCD / CMOS sensor of its own device. The optical link is then aligned.

[0028] Signal transmission: The transmitted signal is transmitted to the signal processing unit through the user interface. After encoding, winding, framing and serial-to-parallel conversion operations, a laser modulation signal is generated and sent to the laser driver. The laser driver controls the laser generator to generate the corresponding signal beam. The signal beam is emitted to the preset communication terminal position after passing through the OPA antenna.

[0029] Signal reception: The CCD / CMOS sensor acquires the image of the signal beam spot and transmits it to the image processing unit. The image processing unit performs operations such as image buffering, image grayscale processing, and spot centroid detection on the acquired spot image. The CCD / CMOS control circuit adjusts the relevant parameters of the CCD / CMOS sensor. Based on the FPGA timing signal and the corresponding spot image features, the modulation signal of the received signal beam is extracted. The signal processing unit performs serial-to-parallel conversion, inter-frame matching, decoding and descrambling operations on the extracted modulation signal to restore the received signal and output it through the user interface.

[0030] This invention discloses an optoelectronic fusion integrated device and method based on a silicon-based optical phased array with an optical waveguide. The device comprises an interconnected FPGA integrated processing module, a laser driver, a laser generator, an OPA antenna, an OPA driving circuit, a CCD / CMOS sensor, a CCD / CMOS control circuit, a signal amplifier, a DDR3 memory chip, a user signal interface, and a power supply module. All of these units are integrated on the same PCB board, realizing signal transmission, signal reception, signal beam pointing, signal processing, and image processing functions of a space laser communication system on a single optoelectronic integrated device. It exhibits extremely high integration, enabling integrated transceiver design of space optical signals without the need for additional mechanical turntable structures. Compared with traditional space laser communication equipment, it offers advantages in miniaturization and lightweight design. The FPGA software module implements signal light modulation and demodulation, OPA antenna driving, and camera image processing functions, providing excellent flexibility. The relevant software can be customized or reconfigured according to actual needs. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0032] Figure 1 This is a schematic diagram of the optoelectronic fusion integrated device based on a silicon-based optical phased array of optical waveguides, according to the first embodiment of the present invention.

[0033] Figure 2 This is a communication transceiver flowchart of the optoelectronic fusion integrated device based on optical waveguide silicon-based optical phased array according to the first embodiment of the present invention.

[0034] Figure 3 This is a flowchart of the optoelectronic fusion integration method based on optical waveguide silicon-based optical phased array according to the second embodiment of the present invention.

[0035] In the diagram: 101-FPGA integrated processing module, 102-laser driver, 103-laser generator, 104-OPA antenna, 105-OPA drive circuit, 106-CCD / CMOS sensor, 107-CCD / CMOS control circuit, 108-signal amplifier, 109-DDR3 memory chip, 110-user interface, 111-power interface. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0037] The first embodiment of this application is as follows:

[0038] Please see Figure 1 and Figure 2 ,in, Figure 1 This is a schematic diagram of the optoelectronic fusion integrated device based on a silicon-based optical phased array of optical waveguides, according to the first embodiment of the present invention. Figure 2 This is a communication transceiver flowchart of the optoelectronic fusion integrated device based on optical waveguide silicon-based optical phased array according to the first embodiment of the present invention.

[0039] This invention provides an optoelectronic fusion integrated device based on a silicon-based optical phased array of optical waveguides: including an FPGA integrated processing module 101, a laser driver 102, a laser generator 103, an OPA antenna 104, an OPA driving circuit 105, a CCD / CMOS sensor 106, a CCD / CMOS control circuit 107, a signal amplifier 108, a DDR3 memory chip 109, a user interface 110, and a power interface 111. The FPGA integrated processing module 101 includes a signal processing unit, an image processing unit, a laser driving control unit, and an OPA beam pointing control unit.

[0040] In this specific embodiment, the FPGA integrated processing module 101 is connected to the OPA driving circuit 105, the DDR3 memory chip 109, the laser driver 102, the signal amplifier 108, and the CCD / CMOS control circuit 107, respectively. The laser generator 103 is connected to the laser driver 102. The OPA antenna 104 is connected to the laser generator 103 and the OPA driving circuit 105, respectively. The CCD / CMOS sensor 106 is connected to the signal amplifier 108 and the CCD / CMOS control circuit 107, respectively.

[0041] The FPGA integrated processing module 101 is used for signal modulation and demodulation, descrambling and scrambling, serial-to-parallel conversion, communication bit error rate monitoring, spot image acquisition, spot image buffering, spot centroid detection, image grayscale processing, exposure threshold setting, laser modulation signal output, and pointing control of the signal beam emitted by the OPA antenna 104, and the software is customized and reconstructed according to engineering requirements.

[0042] The OPA driving circuit 105 is used to receive the OPA antenna phase modulation voltage sent by the FPGA integrated processing module 101 and send it to the phase shifter array of the OPA antenna 104 to control the OPA antenna to deflect the emitted signal beam to a preset position.

[0043] The OPA antenna 104 is used to emit a signal beam and deflect it to a preset position, and in combination with the OPA driving circuit, the direction control of the signal beam is realized.

[0044] The laser driver 102 is used to receive the laser modulation signal sent by the FPGA integrated processing module and control the laser generator 103 to generate the corresponding signal beam;

[0045] The laser generator 103 is used to generate a seed laser source, which, in conjunction with a laser driver, can generate a modulated signal beam.

[0046] The CCD / CMOS sensor 106 is used to receive the signal beam, acquire the image of the signal beam spot, and convert it into an electrical signal.

[0047] The signal amplifier 108 is used to amplify the electrical signal received from the CCD / CMOS sensor 106 and transmit it to the FPGA integrated processing module 101.

[0048] The CCD / CMOS control circuit 107 is used to transmit the control signal sent by the FPGA integrated processing module to the CCD / CMOS sensor 106, and control its exposure time, grayscale threshold and other related parameters and working status.

[0049] The DDR3 memory chip 109 is used to cache the CCD / CMOS image signals acquired by the FPGA integrated processing module 101, cache the real-time data stream, and feed it back to the FPGA integrated processing module 101 in the form of a complete image.

[0050] The OPA antenna 104 is equipped with interconnected optical signal couplers, an optical power distribution array, a phase shifter array, and an optical antenna array. The signal light generated by the laser generator 103 enters the optical power distribution array through the optical signal coupler. The optical power distribution array achieves equal power and equal optical path distribution of the input light, ensuring that the optical signals in each channel are in phase. The phase shifter array receives the phase modulation voltage from the OPA driving circuit 105 and modulates the phase of the optical signal in each channel. The light in each channel is emitted into space through the optical antenna array, where it is combined and pointed towards the target point. By changing the phase of the optical signals in each channel, the emission angle of the beam formed after beam combining can be changed, thereby achieving the deflection or scanning of the signal beam in space. The OPA driving circuit 105 receives the OPA antenna phase modulation voltage from the OPA beam pointing control unit in the FPGA integrated processing module 101 and sends it to the phase shifter array in the OPA antenna 104, controlling the OPA antenna to deflect the emitted signal beam towards a preset position. The DDR3 memory chip 109 is responsible for caching the CCD / CMOS image signals acquired by the FPGA integrated processing module 101, caching the real-time data stream and feeding it back to the image processing unit in the FPGA integrated processing module 101 in the form of a complete image, and performing image grayscale processing, spot centroid detection and modulation signal extraction.

[0051] The signal processing unit is used to perform modulation and demodulation, code-wrapping and decoding, inter-frame matching, serial-to-parallel conversion and other processing on the transmitted and received signals, and to monitor the communication error rate in real time during the communication process.

[0052] The image processing unit is used to perform operations such as acquiring spot images from the CCD / CMOS sensor, buffering the acquired signal beam spot images, processing image grayscale, and detecting the centroid of the spot, and extracting the modulation signal of the received signal beam based on the FPGA timing signal and the corresponding spot image features.

[0053] The laser drive control unit is used to send the laser modulation signal to the laser driver 102 and control the laser generator 103 to generate a corresponding signal beam, which is emitted through the OPA antenna 104.

[0054] The OPA beam pointing control unit is used to send the phase modulation voltage of each channel of the phase shifter array in the OPA antenna 104 to the OPA antenna phase shifter array through the OPA driving circuit 105, and control the OPA antenna to deflect the emitted signal beam to a preset position.

[0055] The FPGA integrated processing module 101 includes the signal processing unit, the image processing unit, the laser drive control unit, and the OPA beam pointing control unit. The signal processing unit can perform modulation and demodulation, code-wrapping decoding, inter-frame matching, serial-to-parallel conversion, and other processing on the transmitted and received signals, and monitor the communication error rate in real time during communication. The image processing unit buffers the real-time data stream acquired by the CCD / CMOS sensor to obtain a complete spot image and extracts the modulation signal of the signal beam according to the FPGA timing signal and the corresponding spot image features. It detects the current light signal intensity information and adjusts the camera's exposure time, grayscale threshold, and other parameters according to the current light intensity information. The laser drive control unit sends the laser modulation signal to the laser driver 102, which controls the laser generator 103 to generate the corresponding signal beam, which is emitted through the OPA antenna 104. The OPA pointing control unit receives preset position pointing information and sends the phase modulation voltage of each channel of the phase shifter array in the OPA antenna 104 to the phase shifter array in the OPA antenna 104 through the OPA drive circuit 105, thereby realizing the optical phase control of each channel of the OPA antenna phase shifter array, and thus achieving the purpose of controlling the deflection or scanning of the signal beam.

[0056] Secondly, the user interface 110 is connected to the FPGA integrated processing module 101;

[0057] The user interface 110 is used to provide a data exchange interface to transmit user data to the FPGA integrated processing module 101. The user interface 110 adopts an RS422 data transmission interface and transmits user data to the FPGA integrated processing module 101 in a full-duplex differential transmission mode.

[0058] Meanwhile, the power interface 111 is used for voltage division and overcurrent protection. It converts the input voltage into the rated operating voltage of each device and inputs it to each device through the printed circuit on the PCB board. When a short circuit or other abnormal situation occurs in the circuit, the circuit is disconnected in time to protect each device from being burned out by excessive current.

[0059] An optoelectronic fusion integrated device based on a silicon-based optical phased array using an optical waveguide, as described in this embodiment, includes the interconnected FPGA integrated processing module 101, a 1550nm band laser generator 103, a laser driver 102, an OPA antenna 104 based on a silicon-based optical waveguide with thermo-optical effect, an OPA driving circuit 105, a CMOS sensor 106, a CMOS control circuit 107, a signal amplifier 108, a DDR3 memory chip 109, a user interface 110 supporting the RS422 protocol, and a power interface 111, wherein:

[0060] The FPGA integrated processing module 101 includes a signal processing unit, an image processing unit, a laser drive control unit, and an OPA beam pointing control unit that can exchange data with each other. The signal processing unit can perform modulation and demodulation, code decoding, inter-frame matching, serial-to-parallel conversion, and other processing on the transmitted and received signals, and monitor the communication error rate in real time during communication. The image processing unit caches the data collected by the CMOS sensor, returns a complete spot image from the DDR3 memory chip, extracts the modulation signal of the signal beam according to the FPGA timing signal and the corresponding spot image features, detects the current light signal intensity information, and adjusts the camera's exposure time, grayscale threshold, and other parameters according to the current light intensity information. The laser drive control unit can control the laser driver 102 and the laser generator 103 to convert the input electrical signal into an optical signal, which is emitted through the OPA antenna 104. The OPA beam pointing control unit sends the modulation voltage of each channel of the phase shifter array in the OPA antenna 104 to the phase shifter array in the OPA antenna 104 through the OPA drive circuit 105, thereby controlling the optical phase of each channel of the OPA antenna and thus controlling the deflection or scanning of the signal beam. The silicon-based optical waveguide phased array antenna based on the thermo-optical effect comprises interconnected optical signal couplers, an optical power distribution array, a phase shifter array, and an optical antenna array. The optical signal couplers couple 1550nm band signal light into the chip. The optical power distribution array achieves equal power and equal optical path distribution of the input light, ensuring phase consistency of the optical signal in each channel. The phase shifter array, based on the thermo-optical effect principle, modulates the phase of the signal light in each channel by applying different voltages to the phase shifter array. Finally, the light in each channel is emitted into space through the optical antenna array and combined in space. The signal processing unit of the FPGA integrated processing module 101 is designed with a communication rate of 10Mbps. The laser driver 102 adopts an IM / DD (Intensity Modulation / Direct Probe) communication system and uses an on-off keying (OOK) modulation method to drive and control the 1550nm band laser generator 103.

[0061] The user interface 110 uses an RS422 data transmission interface to transmit user data to the FPGA integrated processing module 101 in a full-duplex differential transmission mode.

[0062] The signal transmission process is as follows: the RS422 protocol user interface 110 receives the user input electrical signal and transmits it to the signal processing unit in the FPGA integrated processing module 101. After signal encoding, winding, framing, serial-to-parallel conversion and other operations, a laser modulation signal is generated and sent to the laser driver 102. The laser driver 102 controls the 1550nm band laser 103 to generate signal light. The signal light passes through the OPA antenna 104 and is emitted to a preset position in space.

[0063] The signal receiving process is as follows: the CMOS sensor 107 receives the incident light beam in the 1550nm band, collects the light spot image data of the signal beam, and transmits it to the image processing unit of the FPGA integrated processing module 101 after passing through the signal amplifier 108. The image processing unit performs operations such as image buffering, image grayscale processing, and light spot centroid detection on the collected light spot image. Based on the FPGA timing signal and the corresponding light spot image features, the modulation signal of the received signal beam is extracted, and the extracted modulation signal is transmitted to the signal processing unit in the FPGA integrated processing module 101. The signal processing unit performs operations such as serial-to-parallel conversion, inter-frame matching, decoding and descrambling on the extracted modulation signal, restores the received signal, and outputs it through the RS422 protocol user interface 110.

[0064] The image processing flow is as follows: the CMOS sensor 107 acquires a light spot image, converts it into an electrical signal, and then transmits it to the image processing unit in the FPGA integrated processing module 101 after passing through the signal amplifier 108. The image processing unit buffers the real-time data stream through the DDR3 memory chip 109 and reads out the complete light spot image. It then performs image grayscale processing, light spot centroid detection, light spot light intensity detection, and modulation signal extraction on the light spot image data to obtain relevant information such as light spot position and light intensity, as well as modulation signals. Based on the light intensity information feedback, it adjusts relevant parameters such as the CMOS sensor exposure time and grayscale threshold.

[0065] This invention realizes the functions of signal transmission, signal reception, signal beam pointing, signal processing, and image processing of a space laser communication system on an optoelectronic integrated device, and has a very high degree of integration.

[0066] This invention enables an integrated design for transmitting and receiving space optical signals without the need for an additional mechanical turntable structure, and has the advantages of miniaturization and lightweight compared with traditional space laser communication equipment.

[0067] This invention uses FPGA software modules to implement functions such as signal light modulation and demodulation, OPA antenna driving, and camera image processing, which has extremely high flexibility. The relevant software can be customized or reconstructed according to actual needs.

[0068] The second embodiment of this application is as follows:

[0069] Based on the first embodiment, please refer to Figure 3 ,in, Figure 3 This is a flowchart of the optoelectronic fusion integration method based on optical waveguide silicon-based optical phased array according to the second embodiment of the present invention.

[0070] The optoelectronic fusion integration method based on silicon-based optical phased arrays using optical waveguides in this embodiment includes the following steps:

[0071] S201: Perform phase calibration on each channel of the optical phased array and initialize each module;

[0072] S202: The FPGA integrated processing module 101 transmits the preset communication terminal position coordinates to the OPA beam pointing control unit. The OPA pointing control unit sends the corresponding phase modulation voltage to the phase shifter array of the OPA antenna 104 through the OPA driving circuit 105, so that the signal beam points to the preset communication terminal position.

[0073] S203: The CCD / CMOS sensor 106 acquires the image of the signal beam spot and transmits it to the image processing unit of the FPGA integrated processing module 101. The image processing unit buffers the real-time image data stream through the DDR3 memory chip 109 and reads out the complete spot image. It performs image grayscale processing, spot centroid detection, and spot light intensity detection on the spot image data to obtain relevant information such as spot position and light intensity. The CCD / CMOS control circuit 107 adjusts relevant parameters such as exposure time and grayscale threshold of the CCD / CMOS sensor 106. The modulation signal of the received signal beam is extracted based on the FPGA timing signal and the corresponding spot image features. S204: The transmitted signal is transmitted to the signal processing unit of the FPGA integrated processing module 101 through the user interface 110. After signal encoding and winding... After operations such as framing and serial-to-parallel conversion, a laser modulation signal is generated and sent to the laser driver 102. The laser driver 102 controls the laser generator 103 to generate a signal beam. The signal beam passes through the OPA antenna 104 and is emitted to the preset communication terminal position. The received signal beam is collected by the CCD / CMOS sensor 106, and after passing through the signal amplifier 108, it is transmitted to the image processing unit of the FPGA integrated processing module 101. The image processing unit performs operations such as image buffering, image grayscale processing, and spot centroid detection on the collected spot image. Based on the FPGA timing signal and the corresponding spot image features, the modulation signal of the received signal beam is extracted and input into the signal processing unit. The signal processing unit performs operations such as signal serial-to-parallel conversion, inter-frame matching, decoding and descrambling to restore the received signal and output it through the user interface 110.

[0074] Specifically, Step 1: Optical Phased Array Phase Calibration and Initialization: Before startup, phase calibration is performed on each channel of the optical phased array to reduce beam pointing errors introduced by the phased array antenna. During startup, each module is initialized, and preset programs and parameters are loaded into the FPGA integrated processing module 101, and initial values ​​are assigned to each register. Step 2: Optical Phased Array Beam Pointing: The FPGA integrated processing module 101 transmits the preset communication terminal position coordinates to the OPA pointing control unit. The OPA pointing control unit sends the corresponding phase modulation voltage to the optical phased array antenna through the OPA driving circuit 105, so that the beam points to the preset communication terminal position. Step 3: Signal Light Reception and Image Processing: The CCD / CMOS sensor 106 receives the signal light spot image and transmits it to the image processing unit in the FPGA integrated processing module 101. The image processing unit reads out the image after buffering three frames through the DDR3 memory chip 109, and adjusts relevant parameters such as CCD / CMOS exposure time and window size through the CCD / CMOS control circuit 107 to prevent overexposure of the light spot from affecting communication quality. Step 4: Communication Link Establishment: The transmitted electrical signal is transmitted through the user interface 110 to the signal processing unit in the FPGA integrated processing module 101. After signal modulation processing, it is sent to the laser driver 102. The laser driver 102 controls the laser to generate signal light. The signal light passes through the OPA antenna 104 and is emitted to the preset communication terminal location. The received signal light is converted into an electrical signal by the CCD / CMOS sensor 106. After passing through the signal amplifier 108 and the analog-to-digital converter, it is transmitted to the signal processing unit in the FPGA integrated processing module 101. The signal processing unit demodulates the signal and outputs it through the user signal interface. Both the transmitting and receiving ends receive the signal from the other end. After signal processing such as code decoding, modulation and demodulation, synchronization is achieved, and the communication link is established.

[0075] This invention realizes the functions of signal transmission, signal reception, signal beam pointing, signal processing, and image processing of a space laser communication system on an optoelectronic integrated device, and has a very high degree of integration.

[0076] This invention enables an integrated design for transmitting and receiving space optical signals without the need for an additional mechanical turntable structure, and has the advantages of miniaturization and lightweight compared with traditional space laser communication equipment.

[0077] This invention uses FPGA software modules to implement functions such as signal light modulation and demodulation, OPA antenna driving, and camera image processing, which has extremely high flexibility. The relevant software can be customized or reconstructed according to actual needs.

[0078] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. An optoelectronic fusion integrated device based on a silicon-based optical phased array with optical waveguides, characterized in that, The device includes an FPGA integrated processing module, a laser driver, a laser generator, an OPA antenna, an OPA driving circuit, a CCD / CMOS sensor, a CCD / CMOS control circuit, a signal amplifier, and a DDR3 memory chip. All of these units are integrated on the same PCB board. The FPGA integrated processing module is connected to the OPA driving circuit, the DDR3 memory chip, the laser driver, the signal amplifier, and the CCD / CMOS control circuit, respectively. The laser generator is connected to the laser driver. The OPA antenna is connected to the laser generator and the OPA driving circuit, respectively. The CCD / CMOS sensor is connected to the signal amplifier and the CCD / CMOS control circuit, respectively. The FPGA integrated processing module is used for signal processing, including signal modulation and demodulation, signal winding and descrambling, signal serial-to-parallel conversion and communication bit error rate monitoring; image processing, including spot image acquisition, spot image buffering, image grayscale processing and spot centroid detection; optical phased array beam pointing control; and customized and reconstructed software according to engineering requirements. The OPA driving circuit is used to receive the OPA antenna phase modulation voltage sent by the FPGA integrated processing module and send it to the OPA antenna phase shifter array to control the OPA antenna to deflect the emitted signal beam to a preset position. The OPA antenna is used to emit a signal beam and deflect it to a preset position, and the direction control of the signal beam is realized in combination with the OPA driving circuit. The laser driver is used to receive the laser modulation signal sent by the FPGA integrated processing module and control the laser generator to generate the corresponding signal beam. The laser generator is used to generate a seed laser source, which, in conjunction with the laser driver, generates a modulated signal beam. The CCD / CMOS sensor is used to receive the signal beam, acquire the image of the signal beam spot, and convert it into an electrical signal; The signal amplifier is used to amplify the electrical signal received from the CCD / CMOS sensor and transmit it to the FPGA integrated processing module. The CCD / CMOS control circuit is used to transmit the control signals issued by the FPGA integrated processing module to the CCD / CMOS sensor to control its exposure time, grayscale threshold parameters and working status. The DDR3 memory chip is used to cache the CCD / CMOS image signals acquired by the FPGA integrated processing module, cache the real-time data stream, and feed it back to the FPGA integrated processing module in the form of a complete image.

2. The optoelectronic fusion integrated device based on silicon-based optical phased array as described in claim 1, characterized in that, The optoelectronic fusion integrated device based on optical waveguide silicon-based optical phased array also includes a user interface, which is connected to the FPGA integrated processing module; The user interface is used to provide a data exchange interface to transmit user data to the FPGA integrated processing module.

3. The optoelectronic fusion integrated device based on silicon-based optical phased array as described in claim 2, characterized in that, The optoelectronic fusion integrated device based on optical waveguide silicon-based optical phased array also includes a power interface; The power interface is used to process the input voltage and convert it into the rated operating voltage of each device, which is then input to each device through the printed circuit board on the PCB.

4. The optoelectronic fusion integrated device based on silicon-based optical phased array as described in claim 1, characterized in that, The FPGA integrated processing module includes a signal processing unit and an image processing unit; The signal processing unit is used to perform modulation and demodulation, code-wrapping and decoding, inter-frame matching, serial-to-parallel conversion processing on the transmitted and received signals, and to monitor the communication bit error rate in real time during the communication process. The image processing unit is used to acquire spot images from the CCD / CMOS sensor, perform image buffering, image grayscale processing, and spot centroid detection on the acquired signal beam spot images, and extract the modulation signal of the received signal beam based on the FPGA timing signal and the corresponding spot image features.

5. The optoelectronic fusion integrated device based on silicon-based optical phased array as described in claim 4, characterized in that, The FPGA integrated processing module also includes a laser drive control unit and an OPA beam pointing control unit; The laser drive control unit is used to send the laser modulation signal to the laser driver, and control the laser generator to generate the corresponding signal beam through the laser driver; the OPA beam pointing control unit is used to send the phase modulation voltage of each channel of the phase shifter array in the OPA antenna to the OPA antenna phase shifter array through the OPA drive circuit, and control the OPA antenna to deflect the emitted signal beam to a preset position.

6. A method for optoelectronic fusion integration based on silicon-based optical waveguide phased arrays, applicable to optoelectronic fusion integration devices based on silicon-based optical waveguide phased arrays as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Initialization: Perform phase calibration on each channel of the optical phased array and initialize each module; Alignment: The FPGA integrated processing module transmits the preset communication terminal position coordinates to the OPA beam pointing control unit. The OPA beam pointing control unit sends the phase modulation voltage of each channel of the phase shifter array in the OPA antenna to the OPA antenna phase shifter array through the OPA driving circuit, and controls the OPA antenna to deflect the emitted signal beam toward the preset communication terminal position, so that the signal beam enters the preset communication terminal. The preset communication terminal receives the signal beam emitted by its own device, and the signal beam emitted by its own device is also received by the CCD / CMOS sensor of its own device. The optical link is then aligned. Signal transmission: The transmitted signal is transmitted to the signal processing unit through the user interface. After encoding, winding, framing and serial-to-parallel conversion operations, a laser modulation signal is generated and sent to the laser driver. The laser driver controls the laser generator to generate the corresponding signal beam. The signal beam is emitted to the preset communication terminal position after passing through the OPA antenna. Signal reception: The CCD / CMOS sensor acquires the image of the signal beam spot and transmits it to the image processing unit. The image processing unit performs image buffering, image grayscale processing, and spot centroid detection on the acquired spot image. The CCD / CMOS control circuit adjusts the relevant parameters of the CCD / CMOS sensor. Based on the FPGA timing signal and the corresponding spot image features, the modulation signal of the received signal beam is extracted. The signal processing unit performs serial-to-parallel conversion, inter-frame matching, decoding, and descrambling operations on the extracted modulation signal to restore the received signal and output it through the user interface.

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