Near-earth optical communication turbulence suppression system and method based on emission source gain regulation

Abstract

The application provides a near-earth optical communication turbulence suppression system and method based on emission source gain regulation, which comprises a host computer and a slave computer, and each comprises a space-fiber coupler, a PSD position detector, a PSD demodulation and control assembly, a communication transmitter-receiver, an electrically-controlled optical attenuator, a stepping actuator and a beacon light emitter; the space-fiber coupler aligns and matches the emitted light with the receiving field of view and couples the space light to the optical fiber; the beacon light emitter emits service beacon light; the PSD position detector performs real-time position detection on the light spot of the service beacon light; the PSD demodulation and control assembly calculates the off-target amount of the light spot position of the service beacon light and its control amount output to the stepping actuator, demodulates the service beacon text data and transmits it to the communication transmitter-receiver; the electrically-controlled optical attenuator regulates the emitted light power of the communication transmitter-receiver; and the communication transmitter-receiver controls the voltage value of the electrically-controlled optical attenuator based on the service beacon text data to realize closed-loop gain control and turbulence suppression from the receiving end to the transmitting end.

Description

Technical Field

[0001] This invention relates to the field of space laser communication technology, and specifically to a near-ground optical communication turbulence suppression system and method based on emitter gain modulation. Background Technology

[0002] Compared to fiber optic communication, space laser communication is easier to deploy and less geographically restricted. Compared to microwave communication, it offers higher transmission rates and is not limited by spectrum resources. Using space laser communication near the ground to transmit 5G backbone network data is an ideal communication solution. It can be deployed between buildings to solve core communication service problems such as the "last mile." It can also be deployed across riverbanks to address temporary communication needs in emergency situations.

[0003] The most severe challenge facing near-ground space laser communication is the turbulence disturbance in the near-ground atmospheric channel. Atmospheric turbulence causes power fluctuations in the communication signal, degrading the bit error rate. Current methods for suppressing atmospheric turbulence include spatiotemporal diversity, large-aperture smoothing, and adaptive optics. However, these methods are not designed specifically for the needs of space laser communication and suffer from high costs, low efficiency, and high expenses, making it difficult to meet the requirement of achieving maximum communication transmission efficiency in the simplest possible way in space laser communication.

[0004] The above issues urgently need to be addressed. Summary of the Invention

[0005] This invention overcomes at least one of the aforementioned drawbacks of the prior art by providing a near-ground optical communication turbulence suppression system based on transmitter gain control. The system includes a master unit and a slave unit, each comprising: a space-fiber coupler, a PSD position detector, a PSD demodulation and control assembly, a communication transceiver, an electrically controlled optical attenuator, a stepper actuator, and a beacon light transmitter. The space-fiber coupler is used to align and match the transmitted light with the receiving field of view and couple the space light to the optical fiber. The beacon light transmitter is used to transmit service beacon light. The PSD position detector is used to control the turbulence of the service beacon light. The light spot is detected in real time; the PSD demodulation and control component is used to calculate the spot position miss distance and control quantity of the service beacon light and output it to the stepper actuator, and demodulate the service beacon message data to the communication transceiver; the electronically controlled optical attenuator is used to regulate the transmitted optical power of the transmission optical path of the communication transceiver; the communication transceiver is used to control the output voltage value of the electronically controlled optical attenuator based on the service beacon message data; the master unit sends communication optical power jitter information to the slave unit through the beacon optical path; the slave unit adjusts the transmission power of the communication optical light in reverse through the communication optical path based on the communication optical power jitter information.

[0006] Furthermore, the host and slave devices also include fiber optic circulators for isolating the transmitted and received communication optical signals.

[0007] Furthermore, the space-fiber coupler is also used for receiving communication light. The space-fiber coupler is connected to one end of a fiber optic circulator via an optical fiber, and the other end of the fiber optic circulator is connected to the communication transceiver via a transmitting fiber and a receiving fiber, thereby isolating the communication light transmission and reception.

[0008] Furthermore, one end of the fiber optic circulator reaches the communication receiving detector via a receiving fiber, enabling the communication transceiver to monitor communication signal fluctuations.

[0009] Furthermore, the transmitting light source of the communication transceiver is input into the transmitting optical fiber via an electronically controlled optical attenuator, which is used to adjust the transmission power of the communication optical fiber based on the voltage value received from the communication transceiver.

[0010] Furthermore, the communication transceiver is also used to modulate communication light, demodulate communication light, modulate beacon light, and monitor communication signal fluctuations.

[0011] Furthermore, the process of the host sending communication optical power jitter information to the slave via the beacon optical path includes: signal fluctuations caused by atmospheric turbulence disturbances in the communication optical path from the slave to the host; the host injecting the received and measured communication signal fluctuation jitter information into the beacon optical path; and the host sending the communication optical power jitter information to the slave via the beacon optical path.

[0012] Furthermore, the beacon optical path includes a service beacon light transmitted by a beacon light transmitter, a PSD position detector, and a PSD demodulation and control component. The beacon optical path is used for spatial capture and tracking and service information transmission.

[0013] Furthermore, the communication optical path includes a communication transceiver, an electrically controlled optical attenuator, an optical fiber circulator, and a space-to-optical fiber coupler, and the communication optical path is used for high-speed data transmission.

[0014] Secondly, the present invention provides a near-ground optical communication turbulence suppression method based on transmitter gain control. The method includes: establishing a communication link with the cooperation of a host and a slave, the communication link including a beacon optical path from the host to the slave and a communication optical path from the slave to the host; the host acquiring jitter information during the transmission of communication signals from the slave to the host; injecting the jitter information of the communication signals received and measured by the host into the beacon optical path and sending it to the slave; and the slave adjusting the transmission power of the transmitter optical path in reverse via the communication optical path based on the jitter information of the communication signals.

[0015] In another aspect, the present invention provides a computer-readable storage medium storing one or more instructions for causing a computer to execute the above-described near-ground optical communication turbulence suppression method based on emitter gain modulation.

[0016] In another aspect, the present invention provides an electronic device, comprising: a memory and a processor; the memory storing at least one program instruction; the processor loading and executing the at least one program instruction to implement the above-described near-ground optical communication turbulence suppression method based on emitter gain modulation.

[0017] The beneficial effects of this invention are as follows: This invention provides a near-ground optical communication turbulence suppression system based on transmitter gain control. The system includes a master unit and a slave unit, which respectively include: a space-fiber coupler, a PSD position detector, a PSD demodulation and control component, a communication transceiver, an electrically controlled optical attenuator, a stepper actuator, an optical fiber circulator, and a beacon light transmitter. The space-fiber coupler is used to align and match the transmitted light with the received field of view and couple the space light to the optical fiber. The beacon light transmitter is used to transmit service beacon light. The PSD position detector is used to detect the light of the service beacon light. The system performs real-time position detection of the beacon beam. The PSD demodulation and control component calculates the spot position miss distance and its control value, outputs it to the stepper actuator, and demodulates the beacon message data to the communication transceiver. The electrically controlled optical attenuator regulates the transmitted optical power of the transceiver's transmit optical path. The transceiver controls the output voltage value of the electrically controlled optical attenuator based on the beacon message data. The master unit sends communication optical power jitter information to the slave unit through the beacon optical path. The slave unit adjusts the transmitted communication optical power in reverse through the communication optical path based on the communication optical power jitter information. By connecting the electrically controlled optical attenuator in series at the transmitting end of the communication link and feeding back the measured optical power and jitter information through the beacon optical path service channel to adjust the variable attenuator, closed-loop gain control and turbulence suppression from the receiving end to the transmitting end are achieved, improving communication quality. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the host or slave structure in a near-ground optical communication turbulence suppression system based on transmitter gain control, provided in an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of a near-ground optical communication turbulence suppression system based on emitter gain modulation provided in an embodiment of the present invention.

[0021] Figure 3This is a flowchart of a near-ground optical communication turbulence suppression method based on emitter gain modulation provided in an embodiment of the present invention.

[0022] Figure 4 This is a partial block diagram of the electronic device provided in the embodiments of the present invention. Detailed Implementation

[0023] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the figures. The process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0024] It should be understood that although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are used merely to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Example 1

[0026] refer to Figure 1-2 The diagram shows a schematic diagram of a host or slave structure of a near-ground optical communication turbulence suppression system based on transmitter gain control and a schematic diagram of the near-ground optical communication turbulence suppression system based on transmitter gain control.

[0027] For ease of understanding, the overall inventive concept of this invention is explained here:

[0028] The atmospheric channel near-ground laser communication link is established through the cooperation of the master and slave units. While bidirectional links are symmetrical, for ease of explanation, a unidirectional link is used as an example. A unidirectional link includes: a high-speed communication link from slave to master, which is subject to signal fluctuations caused by atmospheric turbulence; and a beacon optical path from master to slave. This beacon optical path serves two purposes: providing a reference for PSD beam tracking and alignment, and modulating low-speed service data to inject communication signal fluctuation jitter information received and measured by the master into the beacon optical path, feeding it back to the slave optical terminal. The slave optical terminal then adjusts the transmission power of its transmitting optical path based on the feedback information, dynamically tracking the communication optical path fluctuations in real time, and performing tracking, suppression, and compensation. This achieves a closed-loop suppression mechanism for detecting communication signal fluctuations from slave to master, feeding back beacon message fluctuation information from master to slave, and tracking and adjusting the transmission power from slave to master, laying the foundation for improving and expanding the dynamic range and communication quality.

[0029] As an example, the system includes a master unit and a slave unit, which respectively include: a space-fiber coupler 1, a PSD position detector 2, a PSD demodulation and control assembly 3, a communication transceiver 4, an electrically controlled optical attenuator 5, a stepper actuator 6, and a beacon light transmitter 7; the space-fiber coupler 1 is used to align and match the transmitted light with the received field of view and couple the space light to the optical fiber; the beacon light transmitter 7 is used to transmit service beacon light; the PSD position detector 2 is used to perform real-time position detection of the service beacon light spot; the PSD demodulation and control assembly 6... The control component 3 is used to calculate the spot position and miss distance of the service beacon light and output its control value to the stepper actuator 6, and demodulate the service beacon message data to the communication transceiver 4; the electrically controlled optical attenuator 5 is used to regulate the transmitted optical power of the transmitted optical path of the communication transceiver 4; the communication transceiver 4 is used to control the output voltage value of the electrically controlled optical attenuator 5 based on the service beacon message data; the master unit sends communication optical power jitter information to the slave unit through the beacon optical path; the slave unit adjusts the transmitted communication optical power in reverse through the communication optical path based on the communication optical power jitter information. That is, the master unit and the slave unit have the same structure, and the master unit can act as a slave unit, and the slave unit can act as a master unit. The beacon light is a service beacon light with low-speed modulated message.

[0030] Preferably, the host and slave devices further include fiber optic circulators 8 for isolating the communication optical transmission signal from the communication optical reception signal.

[0031] Preferably, the space-fiber coupler 1 is also used for receiving communication light. The space-fiber coupler 1 is connected to one end of the fiber optic circulator 8 via an optical fiber, and the other end of the fiber optic circulator 8 is connected to the communication transceiver 4 via a transmitting optical fiber and a receiving optical fiber, thereby isolating the communication light transmission and reception.

[0032] Preferably, one end of the fiber optic circulator 8 reaches the communication receiving detector via a receiving fiber, enabling the communication transceiver 4 to monitor communication signal fluctuations.

[0033] Preferably, the light source of the communication transceiver 4 is input into the transmitting optical fiber via an electrically controlled optical attenuator 5, and the electrically controlled optical attenuator 5 is used to adjust the transmission power of the communication optical fiber based on the voltage value received from the communication transceiver 4.

[0034] Preferably, the communication transceiver 4 is also used for modulating communication light, demodulating communication light, modulating beacon light, and monitoring communication signal fluctuations.

[0035] Preferably, the host sending communication optical power jitter information to the slave via the beacon optical path includes: signal fluctuations caused by atmospheric turbulence disturbance in the communication optical path from the slave to the host; the host injecting the received and measured communication signal fluctuation jitter information into the beacon optical path; and the host sending the communication optical power jitter information to the slave via the beacon optical path.

[0036] Preferably, the beacon optical path includes a service beacon light transmitted by a beacon light transmitter 7, a PSD position detector 2, and a PSD demodulation and control component 3. The beacon optical path is used for space capture and tracking and service information transmission.

[0037] Preferably, the communication optical path includes a communication transceiver, an electrically controlled optical attenuator, an optical fiber circulator, and a space-to-fiber coupler, and the communication optical path is used for high-speed data transmission.

[0038] In the above embodiments, by injecting the communication signal fluctuation jitter information received and measured by the host into the beacon optical path and feeding it back to the slave optical terminal, the slave optical terminal adjusts the transmission power of the transmitting optical path according to the feedback information, dynamically tracks the fluctuations of the communication optical path in real time, and then performs tracking, suppression and compensation. This achieves a closed-loop suppression of communication signal fluctuation detection from slave to host, beacon message fluctuation information feedback from host to slave, and communication transmission power tracking and adjustment from slave to host, laying the foundation for improving and expanding the dynamic range and communication quality.

[0039] Example 2

[0040] like Figure 3 The diagram shows a flowchart of a near-ground optical communication turbulence suppression method based on transmitter gain modulation.

[0041] As an example, the method includes:

[0042] S310: A communication link is established with the cooperation of the host and the slave, the communication link including a beacon optical path from the host to the slave and a communication optical path from the slave to the host.

[0043] S320: The host acquires information about fluctuations and jitters during the transmission of communication signals from the slave to the host.

[0044] S330: Injects the communication signal fluctuation and jitter information received and measured by the host into the beacon optical path and sends it to the slave.

[0045] S340: The slave device adjusts the transmission power of the transmission optical path in reverse via the communication optical path based on the communication signal fluctuation jitter information.

[0046] It is not difficult to see that this embodiment is a system implementation corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and will not be repeated here to reduce repetition. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment.

[0047] Example 3

[0048] This invention also proposes a storage medium storing a near-ground optical communication turbulence suppression method based on transmitter gain modulation. When the near-ground optical communication turbulence suppression program based on transmitter gain modulation is executed by a processor, it implements the steps of the near-ground optical communication turbulence suppression method based on transmitter gain modulation as described above. Since this storage medium adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0049] Example 4

[0050] Please see Figure 4 The present invention also provides an electronic device, including: a memory and a processor; the memory stores at least one program instruction; the processor loads and executes the at least one program instruction to implement the near-ground optical communication turbulence suppression method based on emitter gain control provided in Embodiment 2.

[0051] The memory 502 and processor 501 are connected via a bus, which may include any number of interconnecting buses and bridges. The bus connects various circuits of one or more processors 501 and memory 502 together. The bus may also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by processor 501 is transmitted over a wireless medium via an antenna, which further receives data and transmits it to processor 501.

[0052] Processor 501 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory 502 can be used to store data used by processor 501 during operation.

[0053] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

[0054] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A near-ground optical communication turbulence suppression system based on transmitter gain modulation, the system comprising a master unit and a slave unit, characterized in that, The host and slave devices respectively include: Space-fiber coupler, PSD position detector, PSD demodulation and control assembly, communication transceiver, electrically controlled optical attenuator, stepper actuator and beacon optical transmitter; The space-fiber coupler is used to align and match the transmitted light with the received field of view, and to couple the space light to the optical fiber; The beacon light transmitter is used to transmit service beacon light; The PSD position detector is used to detect the real-time position of the spot of the service beacon light; The PSD demodulation and control component is used to calculate the spot position miss distance of the service beacon light and its control quantity, output it to the stepper actuator, and demodulate the service beacon message data transmission to the communication transceiver. The electronically controlled optical attenuator is used to regulate the transmitted optical power of the transmitting optical path of the communication transceiver; The communication transceiver is used to control and output the voltage value of the electronically controlled optical attenuator based on the service beacon message data. The host sends communication optical power jitter information to the slave through the beacon optical path; The slave device adjusts the communication optical transmission power in reverse through the communication optical path based on the communication optical power jitter information.

2. The near-ground optical communication turbulence suppression system based on emitter gain control according to claim 1, characterized in that, The host and slave devices also include fiber optic circulators for isolating the transmitted and received optical communication signals.

3. The near-ground optical communication turbulence suppression system based on emitter gain control according to claim 2, characterized in that, The space-fiber coupler is also used for receiving communication light. The space-fiber coupler is connected to one end of a fiber optic circulator via an optical fiber, and the other end of the fiber optic circulator is connected to the communication transceiver via a transmitting fiber and a receiving fiber, thereby isolating the communication light transmission and reception.

4. The near-ground optical communication turbulence suppression system based on emitter gain control according to claim 3, characterized in that, One end of the fiber optic circulator reaches the communication receiving detector via a receiving fiber, enabling the communication transceiver to monitor communication signal fluctuations.

5. The near-ground optical communication turbulence suppression system based on emitter gain control according to claim 1, characterized in that, The transmitting light source of the communication transceiver is input into the transmitting optical fiber via an electronically controlled optical attenuator. The electronically controlled optical attenuator is used to adjust the transmission power of the communication optical fiber based on the voltage value received from the communication transceiver.

6. The near-ground optical communication turbulence suppression system based on emitter gain control according to claim 1, characterized in that, The communication transceiver is also used to modulate communication light, demodulate communication light, modulate beacon light, and monitor communication signal fluctuations.

7. The near-ground optical communication turbulence suppression system based on emitter gain control according to claim 1, characterized in that, The host sends communication optical power jitter information to the slave via the beacon optical path, including: The communication optical path from the slave to the host is affected by atmospheric turbulence, causing signal fluctuations. The host computer will inject the received and measured communication signal fluctuation jitter information into the beacon optical path; The host sends communication optical power jitter information to the slave through the beacon optical path.

8. The near-ground optical communication turbulence suppression system based on emitter gain control according to claim 7, characterized in that, The beacon optical path includes a service beacon light transmitted by a beacon light transmitter, a PSD position detector, and a PSD demodulation and control component. The beacon optical path is used for space capture and tracking and service information transmission.

9. The near-ground optical communication turbulence suppression system based on emitter gain control according to claim 1, characterized in that, The communication optical path includes an FSO main antenna, a communication transceiver, an electrically controlled optical attenuator, an optical fiber circulator, and a space-to-optical fiber coupler. The communication optical path is used for high-speed data transmission.

10. A method for suppressing turbulence in near-ground optical communication based on transmitter gain modulation, characterized in that, The method includes: A communication link is established with the cooperation of the master and slave. The communication link includes a beacon optical path from the master to the slave and a communication optical path from the slave to the master. The communication link between the master and the slave is a bidirectional symmetrical link. The host acquires information about fluctuations and jitters during the transmission of communication signals from the slave to the host. The communication signal fluctuation and jitter information received and measured by the host is injected into the beacon optical path and sent to the slave device; The slave device adjusts the transmission power of the transmission optical path in reverse via the communication optical path based on the communication signal fluctuation jitter information.

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