CN112910550A - Multi-node space laser communication method based on dual wavelengths - Google Patents
Multi-node space laser communication method based on dual wavelengths Download PDFInfo
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- CN112910550A CN112910550A CN202110116208.XA CN202110116208A CN112910550A CN 112910550 A CN112910550 A CN 112910550A CN 202110116208 A CN202110116208 A CN 202110116208A CN 112910550 A CN112910550 A CN 112910550A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/506—Multiwavelength transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
Abstract
The invention discloses a multi-node space laser communication method based on dual wavelengths. The invention comprises a main node and a plurality of slave nodes; the main transmitting-receiving integrated antenna module is connected with the light path switching module through the main APT module, collects the space light and inputs the space light to the main APT module, and the main APT module separates the signal light of the slave node in the space light from the beacon light and sends the signal light to the light path switching module; the APT modules of the master node and the slave nodes enable the master receiving-transmitting integrated antenna module and the slave receiving-transmitting integrated antenna module to be dynamically aligned by tracking beacon light emitted by the opposite side, the light path switching module receives and processes signal light, and the processed signal light is directly sent to the appointed slave node through the master receiving-transmitting integrated antenna module. The invention supports free, simultaneous and bidirectional space laser communication from the master node to the slave nodes and among the slave nodes; the device has the characteristics of saving wavelength resources, compact structure and high feasibility.
Description
Technical Field
The patent relates to a multi-node space laser communication method in the field of space laser communication, in particular to a multi-node space laser communication method based on dual wavelengths.
Background
Space laser communication is a communication method in which a laser beam is used as a carrier wave to directly transmit signals in space. In addition, the laser beam has concentrated energy and good directivity, so that the high-precision high-.
Compared with the traditional microwave communication, the space laser communication has extremely large bandwidth and can carry out data transmission at higher speed.
The space laser communication quickly establishes the network, is not influenced by the landform and the landform, and can solve the problem of network laying in the area with severe environment for the last kilometer. Meanwhile, the traditional communication can cause connection interruption due to natural disasters, and the communication network of the affected area can be quickly recovered through space laser communication.
Conventional space laser communication is limited to point-to-point communication, i.e. a communication link is established between two nodes only. This approach has certain limitations, cannot form an effective spatial network connection, and is susceptible to geographical location and link conditions. Solutions based on wavelength division multiplexing WDM and optical add/drop multiplexer OADM have been proposed for point-to-multipoint and multipoint-to-multipoint, but the practical applicability is not high, and no specific implementation is given.
In a free space optical communication system, in order to reduce the volume and reduce the weight of equipment, a transmitting-receiving integrated optical antenna is generally adopted, and meanwhile, received and transmitted signal light is subjected to spectrum isolation, namely the wavelength of the transmitted and received light is inconsistent, but for the connection among multiple points, precious channel resources are wasted due to the abuse of the wavelength, and meanwhile, a complicated wavelength management problem is introduced for solving the wavelength conflict, so that the unification of parameters of each node equipment and the formation of a standardized network are not facilitated.
Disclosure of Invention
The invention provides a multi-node space laser communication method based on dual wavelengths, which can solve the problem of how to perform space laser communication among multiple nodes, so that a more complex network topology structure can be formed among the multiple nodes, a space laser communication network is further formed, and the heaven-earth integrated network construction is promoted.
The invention aims to solve the problem of multi-node space laser communication by using a main node based on a dual-wavelength scheme.
The invention adopts a dual-wavelength scheme, namely all slave nodes communicate to the master node by adopting signals with the wavelength of lambda 1, and the master node sends signals to each slave node with the wavelength of lambda 2.
The technical scheme of the invention is as follows:
the invention comprises a main node and a plurality of slave nodes; the master node comprises a master receiving and transmitting integrated antenna module, a master acquisition alignment tracking module and a light path switching module, and the slave node is mainly formed by connecting a slave receiving and transmitting integrated antenna module and a slave acquisition alignment tracking module;
the main receiving and transmitting integrated antenna module is connected with the light path switching module through a main capturing alignment tracking module, collects space light and inputs the space light to the main capturing alignment tracking module, the main capturing alignment tracking module separates signal light and beacon light of a slave node in the space light and sends the signal light to the light path switching module, and the slave capturing alignment tracking module separates the signal light and the beacon light of a master node in the space light;
the main acquisition alignment tracking module and the auxiliary acquisition alignment tracking module enable the main receiving and transmitting integrated antenna module and the auxiliary receiving and transmitting integrated antenna module to be dynamically aligned by tracking beacon light emitted by the opposite side, the light path switching module receives signal light and processes the signal light, and the processed signal light is directly sent to a designated auxiliary node through the main receiving and transmitting integrated antenna module.
The optical path switching module comprises a plurality of slave node transmission modules, a wavelength conversion system, an electronic system and an optical switch matrix, wherein each slave node transmission module is connected with the wavelength conversion system, the electronic system and the optical switch matrix;
a slave node transmission module comprises a circulator, a low-noise pre-erbium-doped fiber amplifier, an optical band-pass filter, a coupler and a post-high-power erbium-doped fiber amplifier;
the wavelength conversion system is provided with a plurality of input ports and output ports, the optical switch matrix is provided with a control port, a plurality of input ports and a plurality of output ports, and the electronic system is provided with a plurality of input ports and two output ports;
in each slave node transmission module, signal light of a slave node is input into a first port of a circulator, and a second port of the circulator is connected with an input port of a coupler after sequentially passing through a low-noise pre-erbium-doped fiber amplifier and an optical band-pass filter;
the first output port of the coupler of each slave node transmission module is connected to each input port of an electronic system, the second output port of the coupler is connected to one input port of a wavelength conversion system, the first output port of the electronic system is connected to the control port of the optical switch matrix, the second output port of the electronic system is connected to one input port of the optical switch matrix, each output port of the wavelength conversion system is connected to one input port corresponding to the optical switch matrix, each output port of the optical switch matrix is connected to the input port of the post-high-power erbium-doped fiber amplifier of each slave node transmission module, and the output port of the post-high-power erbium-doped fiber amplifier in each slave node transmission module is connected to the third port of the circulator.
The receiving and transmitting integrated antenna module in the main node comprises a plurality of receiving and transmitting integrated antennas, the plurality of receiving and transmitting integrated antennas work independently, the number of the slave node transmission modules is the same as that of the receiving and transmitting integrated antennas, each receiving and transmitting integrated antenna is connected with one slave node transmission module, each receiving and transmitting integrated antenna corresponds to each slave node one by one, signal light of each slave node is received and transmitted to the corresponding slave node transmission module through one receiving and transmitting integrated antenna, and signals output by the slave node transmission module are directly transmitted to the slave node through the corresponding receiving and transmitting integrated antenna.
The number of input ports and output ports of the wavelength conversion system, the number of input ports of the electronic system and the number of output ports of the optical switch matrix are the same as the number of slave node transmission modules.
The wavelength conversion system comprises a data conversion module and a plurality of optical modules, wherein each optical module is provided with an input end, a data conversion end and an output end, the data conversion ends of the optical modules are connected with the data conversion module after the optical modules are arranged in parallel, the output of one optical module is used as an input port of the wavelength conversion system, and the output of one optical module is used as an output port of the wavelength conversion system.
The beam splitting parameters of the coupler are designed according to actual conditions.
The electronic system is provided with an optical module, the output of the optical module is used as a second output port of the electronic system, the electronic system generates main node signal light, and the main node signal light is transmitted to the optical switch matrix through the second output port of the electronic system after being subjected to signal conversion by the optical module.
The electronic system demodulates the transmitted signal light of a plurality of slave nodes and the special control field in the signal light of a master node and then converts the demodulated signal light into a control sub-instruction of the optical switch, the control instruction consisting of the control sub-instructions is sent to a control port of the optical switch matrix from a first output port, and the control instruction configures an optical path in the optical switch matrix.
The number of input ports of the optical switch matrix is one more than that of output ports of the optical switch matrix; the number of input ports of the optical switch matrix in actual operation does not exceed the number of output ports of the optical switch matrix; a signal input from an input port of the optical switch matrix must be output from an output port of the optical switch matrix.
The invention has the beneficial effects that:
the invention provides a method for realizing a main node in a multi-node space laser communication system based on a dual-wavelength scheme, and designs a main node structure, thereby supporting free, simultaneous and bidirectional space laser communication from the main node to a slave node and among all slave nodes. The invention can solve the communication problem among multiple nodes in the integrated space network, and solve the problems of disordered wavelength distribution and channel resource waste among the nodes in the space laser communication star network topology; the method has the characteristics of saving wavelength resources, compact structure and high feasibility, and is favorable for forming more complex network topology and even local area network in space laser communication.
Drawings
FIG. 1 is a schematic diagram of master-slave node connections;
FIG. 2 is a schematic diagram of an internal structure of an optical circuit switching module;
FIG. 3 is a schematic diagram of a link operating state;
FIG. 4 is a schematic diagram of example scenario 1;
in the figure: the device comprises a circulator 1, a low-noise pre-erbium-doped fiber amplifier 2, an optical band-pass filter 3, a coupler 4, an electronic system 5, a data conversion module 6, an optical module 7, an optical switch matrix 8 and a post-high-power erbium-doped fiber amplifier 9.
The number of slave nodes in the figure is 4, and the number of ports can be increased or decreased according to actual needs.
Detailed Description
The following describes the embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the present invention includes a master node and a plurality of slave nodes; the master node comprises a master receiving and transmitting integrated antenna module, a master acquisition alignment tracking module APT and a light path switching module, and the slave node is mainly formed by connecting a slave receiving and transmitting integrated antenna module and a slave acquisition alignment tracking module APT;
the main receiving and transmitting integrated antenna module is connected with the light path switching module through a main capturing alignment tracking module APT, the main receiving and transmitting integrated antenna module collects space light and inputs the space light to the main capturing alignment tracking module APT, the main capturing alignment tracking module APT separates signal light and beacon light of a slave node in the space light and sends the signal light to the light path switching module, and the slave capturing alignment tracking module APT separates the signal light and the beacon light of a master node in the space light;
the main capture alignment tracking module (APT) and the auxiliary capture alignment tracking module (APT) enable the main transmit-receive integrated antenna module and the auxiliary transmit-receive integrated antenna module to be dynamically aligned through tracking beacon light emitted by the opposite side, reliability of a space laser communication link is achieved, the light path switching module receives signal light and carries out wavelength conversion processing on the signal light, the processed signal light is directly sent to a designated auxiliary node through the main transmit-receive integrated antenna module and can only receive signals of a main node and send signals to the main node, the main node can not only receive signals of the auxiliary node and send signals generated by the main node to the auxiliary node, but also can forward signals between the auxiliary nodes, and the main node realizes free signal exchange between the auxiliary nodes and between the main node and the auxiliary node.
The main receiving and transmitting integrated antenna module and the auxiliary receiving and transmitting integrated antenna module have the same functions, and the main acquisition alignment tracking module APT and the auxiliary acquisition alignment tracking module APT have similar functions.
The receiving and transmitting integrated antenna module is composed of a large-caliber optical antenna and realizes two functions; transmitting beacon light and space light, capturing the beacon light and the space light;
the capture alignment tracking module APT mainly comprises a CCD camera, a fine tracking galvanometer, a coarse aiming galvanometer, a beacon light laser, a servo motor and a master control system.
The main capturing alignment tracking module APT adjusts the direction of the main receiving and transmitting integrated antenna module in real time, so that the beacon light of the slave node is always positioned at the imaging position of the CCD camera of the main capturing alignment tracking module APT, the dynamic alignment of the receiving and transmitting integrated antenna of the master node and the slave node is realized, and the reliability of a link is ensured.
The receiving and transmitting integrated antenna module and the capture alignment tracking module APT in the scheme have the same module structure and use as those in conventional point-to-point space laser communication.
As shown in fig. 2, the optical path switching module includes a plurality of slave node transmission modules, a wavelength conversion system, an electronic system 5 and an optical switch matrix 8, each slave node transmission module is connected to the wavelength conversion system, the electronic system 5 and the optical switch matrix 8, the wavelength conversion system is connected to the optical switch matrix 8, and the optical switch matrix 8 is further connected to the electronic system 5;
a slave node transmission module comprises a circulator 1, a low-noise pre-erbium-doped fiber amplifier 2, an optical band-pass filter 3, a coupler 4 and a post-high-power erbium-doped fiber amplifier 9;
the wavelength conversion system is provided with a plurality of input ports and output ports, the optical switch matrix 8 is provided with a control port, a plurality of input ports and a plurality of output ports, and the electronic system 5 is provided with a plurality of input ports and two output ports;
in each slave node transmission module, signal light of a slave node is input into a first port a of a circulator, and a second port b of the circulator is connected with an input port of a coupler 4 after sequentially passing through a low-noise pre-erbium-doped fiber amplifier 2 and an optical band-pass filter 3; the low-noise preposed erbium-doped fiber amplifier 2 amplifies the power of the signal light of the slave node, the amplified power range is specifically the range of the working power of a detector in an optical module, and the optical band-pass filter 3 filters out stray light signals, so that the interference of the stray light signals is prevented, and the signal-to-noise ratio of the signal light of the slave node is improved.
A first output port of the coupler 4 of each slave node transmission module is connected to a respective input port of the electronic system 5, a second output port of the coupler 4 is connected to an input port of the wavelength conversion system, a first output port of the electronic system 5 is connected to a control port of the optical switch matrix 8, a second output port of the electronic system 5 is connected to an input port of the optical switch matrix 8, each output port of the wavelength conversion system is connected to a corresponding input port of the optical switch matrix 8, a respective output port of the optical switch matrix 8 is connected to an input port of the post-positioned high-power erbium-doped fiber amplifier 9 of each slave node transmission module, an output port of the post-positioned high-power erbium-doped fiber amplifier 9 of each slave node transmission module is connected to a third port c of the circulator, the post-positioned high-power erbium-doped fiber amplifier 9 amplifies the power of the signal light transmitted by the optical switch matrix 8 to a larger, the output power is on the order of watts. The circulator controls the transmission of the optical path, and ensures the realization of the one-way transmission and the duplex mode of the optical path.
The receiving and transmitting integrated antenna module in the main node comprises a plurality of receiving and transmitting integrated antennas, and in the specific implementation, the receiving and transmitting integrated antennas are in a Cassegrain type in consideration of the limitation of volume and weight, the optical antenna comprises a plurality of integrated receiving and transmitting antennas, wherein the plurality of integrated receiving and transmitting antennas work independently, the installation position of the integrated receiving and transmitting antennas is designed to cover a wide-angle space view field according to needs so as to more conveniently capture beacon light of a slave node, the number of the integrated receiving and transmitting antennas is the same as that of the slave node transmission module, each integrated receiving and transmitting antenna is connected with one slave node transmission module, each integrated receiving and transmitting antenna is in one-to-one correspondence with each slave node, signal light of each slave node is received and transmitted to the corresponding slave node transmission module through one integrated receiving and transmitting antenna, signals output by the slave node transmission module are directly transmitted to the slave node through the corresponding integrated receiving and transmitting antenna, and in specific implementation, the number of the integrated receiving and transmitting antennas of the master node is not less than the.
The number of input ports and output ports of the wavelength conversion system, the number of input ports of the electronic system 5 and the number of output ports of the optical switch matrix 8 are the same as the number of slave node transmission modules.
The wavelength conversion system comprises a data conversion module 6 and a plurality of optical modules 7, each optical module 7 is provided with an input end, a data conversion end and an output end, the data conversion ends of the optical modules 7 are connected with the data conversion module 6 after the optical modules 7 are arranged in parallel, the output of one optical module 7 is used as an input port of the wavelength conversion system, and the output of one optical module 7 is used as an output port of the wavelength conversion system. In the wavelength conversion system, the multi-path signals are not exchanged, and in a specific implementation, the data conversion module 6 is an optical fiber transceiver, a switching host, or another device having a function of converting signals into data that can be processed by the optical module 7, and the optical module 7 converts the wavelength λ 1 of the signal light of the slave node into the wavelength λ 2.
The beam splitting parameters of the coupler 4 are designed according to actual conditions. In specific implementation, beam splitting parameters are adopted as 1: 9, 10% of the signal light enters the electronic system 5, and the remaining 90% of the signal light enters the wavelength conversion system.
The electronic system 5 is provided with an optical module 7, the output of the optical module 7 is used as a second output port of the electronic system 5, the electronic system 5 generates master node signal light, the master node signal light is subjected to signal conversion by the optical module 7 and then is sent to the optical switch matrix 8 through the second output port of the electronic system 5, and signal exchange between the master node and the slave node is achieved.
The electronic system 5 demodulates the special control fields in the signal lights of the plurality of slave nodes and converts the demodulated special control fields into control sub-instructions of the optical switch, the control instructions composed of the plurality of control sub-instructions are sent to the control ports of the optical switch matrix 8 from the first output port, and the control instructions configure the optical paths in the optical switch matrix 8 as required, as shown in fig. 3.
The number of input ports of the optical switch matrix 8 is one more than that of output ports of the optical switch matrix 8; the number of input ports of the optical switch matrix 8 in actual operation does not exceed the number of output ports of the optical switch matrix 8; a signal input from an input port of the optical switch matrix 8 must be output from an output port of the optical switch matrix 8.
In a specific implementation, as shown in fig. 1, the wavelength of the signal light transmitted from the slave node to the master node is λ 1, the wavelength of the signal light transmitted from the master node to the slave node is λ 2, and duplex communication is performed between the master node and the slave node. The number of slave nodes is four in the diagram.
The number of the optical antennas of the master node and the number of the input and output ports of the optical path switching module can be determined according to the number of the slave nodes, and the number of the slave nodes can be increased or decreased according to the number of the input and output ports of the optical path switching module. But the number of the simultaneously connected slave nodes cannot be larger than the number of the input and output ports of the pre-designed optical path switching module.
The number of optical antennas of the master node in fig. 2 and the number of ports of some components in the optical path switching module are also four, and it should be noted that the positions of the 4 optical antennas in fig. 2 do not represent actual positions thereof, and actually, the optical antennas may be installed and distributed spatially differently according to needs, so as to achieve capture of a larger range of slave nodes.
The electronic system 5 is composed of an UltraVirtex 7 series FPGA board card produced by Xilinx corporation, and has a function of processing high-speed signals, the UltraVirtex 7 series FPGA board card provides an optical module interface, the optical module 7 is connected with the optical module interface, so that the optical module 7 converts electric signals generated by the UltraVirtex 7 series FPGA board card into main node signal light with a wavelength of lambda 2, the output of the optical module 7 is used as a second output port of the electronic system 5, the electronic system 5 can capture and demodulate special control fields in each path of signals with the wavelength of lambda 1 and convert the special control fields into corresponding control sub-instructions, and the electronic system 5 also has an RS232 control port to be connected with the optical switch matrix 8.
It should be noted that the wavelength conversion system can have various schemes, including an optical-electrical hybrid scheme based on the optical module 7 and the switching host, and an all-optical wavelength conversion type based on a nonlinear effect. The combination of the optical module 7 and the switching host 6 with high commercialization degree is used in the present invention to realize the function of the wavelength conversion system.
The optical module 7 is generally an SFP + interface optical module using commercial DWDM, and the rate is generally 10G, 25G, 40G, and can reach 400G at most. If a 40G optical module is adopted, the theoretical maximum throughput of the main node can reach 160Gbps to the maximum, and the traffic requirement of the small network node can be met.
The exchange host provides data channels for each optical module, realizes the shaping, amplification and regeneration of signal light, and avoids the deterioration of the signal light in the next transmission stage.
The function of the optical switch matrix 8 is to construct optical paths at different input and output ports according to control commands. The present aspect employs a MEMS type optical switch matrix. At present, the mainstream commercial optical switches are based on a mechanical galvanometer type, an MEMS type and an SOA type, the speed is different from ns level to ms level, and different types of optical switch matrixes can be selected according to the requirement actually.
The electronic system 5 configures the optical switch matrix path, and then the four paths of data loads have different flow directions according to the optical switch matrix path, so that the optical switch matrix can be dynamically configured to change the end point of the data load, and the link working state diagram of fig. 3 shows the connection state during actual working.
The devices in the design scheme of the invention are mature commercial products, and have high feasibility and simple structure. In the scheme, each node can be connected with any other node through the main node, the main node can reshape, amplify and regenerate each signal to realize longer-distance space laser communication, and meanwhile, the scheme can also solve the problem that a space laser communication link is interrupted due to severe local conditions between the two nodes or due to the pitch angle limit of an APT system, so the scheme has certain application value.
As shown in fig. 4, the flying platform is used as a relay node, and the ground station, the offshore ship and the air node can communicate with each other by using space laser communication, so that a miniaturized local area network is formed.
The invention can also carry out communication between satellites, so that the communication between a low-orbit satellite and a high-orbit satellite or between a high-orbit satellite and a high-orbit satellite is carried out, and the satellite networking based on the space laser communication is realized.
If only used between land-based non-mobile nodes, the system structure of the invention can be further simplified, and the complex APT system can be replaced by a mechanical adjusting device.
In addition, the invention can realize data relay and rapid erection of local area network for the areas with difficult laying of optical fiber links, such as mountainous areas or field camp.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can make slight changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (9)
1. A multi-node space laser communication method based on dual wavelengths is characterized in that: the system comprises a master node and a plurality of slave nodes; the master node comprises a master receiving and transmitting integrated antenna module, a master acquisition alignment tracking module (APT) and a light path switching module, and the slave node is mainly formed by connecting a slave receiving and transmitting integrated antenna module and a slave acquisition alignment tracking module (APT);
the main receiving and transmitting integrated antenna module is connected with the light path switching module through a main capturing alignment tracking module (APT), the main receiving and transmitting integrated antenna module collects space light and inputs the space light to the main capturing alignment tracking module (APT), the main capturing alignment tracking module (APT) separates signal light and beacon light of a slave node in the space light and sends the signal light to the light path switching module, and the slave capturing alignment tracking module (APT) separates the signal light and the beacon light of a master node in the space light;
the main acquisition alignment tracking module (APT) and the auxiliary acquisition alignment tracking module (APT) enable the main receiving and transmitting integrated antenna module and the auxiliary receiving and transmitting integrated antenna module to be dynamically aligned by tracking beacon light emitted by the opposite side, the light path switching module receives signal light and processes the signal light, and the processed signal light is directly sent to a designated slave node through the main receiving and transmitting integrated antenna module.
2. A dual wavelength based multi-node space laser communication method according to claim 1, wherein: the optical path switching module comprises a plurality of slave node transmission modules, a wavelength conversion system, an electronic system (5) and an optical switch matrix (8), each slave node transmission module is connected with the wavelength conversion system, the electronic system (5) and the optical switch matrix (8), the wavelength conversion system is connected with the optical switch matrix (8), and the optical switch matrix (8) is also connected with the electronic system (5);
the slave node transmission module comprises a circulator (1), a low-noise pre-erbium-doped fiber amplifier (2), an optical band-pass filter (3), a coupler (4) and a post-high-power erbium-doped fiber amplifier (9);
the wavelength conversion system is provided with a plurality of input ports and output ports, the optical switch matrix (8) is provided with a control port, a plurality of input ports and a plurality of output ports, and the electronic system (5) is provided with a plurality of input ports and two output ports;
in each slave node transmission module, signal light of a slave node is input into a first port (a) of a circulator, and a second port (b) of the circulator is connected with an input port of a coupler (4) after sequentially passing through a low-noise pre-erbium-doped fiber amplifier (2) and an optical band-pass filter (3);
the first output port of the coupler (4) of each slave node transmission module is connected to each input port of an electronic system (5), the second output port of the coupler (4) is connected to one input port of a wavelength conversion system, the first output port of the electronic system (5) is connected to a control port of an optical switch matrix (8), the second output port of the electronic system (5) is connected to one input port of the optical switch matrix (8), each output port of the wavelength conversion system is connected to one input port corresponding to the optical switch matrix (8), each output port of the optical switch matrix (8) is connected to an input port of a post-positioned high-power erbium-doped fiber amplifier (9) of each slave node transmission module, and the output port of the post-positioned high-power erbium-doped fiber amplifier (9) in each slave node transmission module is connected to the third port (c) of the circulator.
3. A dual wavelength based multi-node space laser communication method according to claim 2, wherein: the receiving and transmitting integrated antenna module in the main node comprises a plurality of receiving and transmitting integrated antennas, the plurality of receiving and transmitting integrated antennas work independently, the number of the slave node transmission modules is the same as that of the receiving and transmitting integrated antennas, each receiving and transmitting integrated antenna is connected with one slave node transmission module, each receiving and transmitting integrated antenna corresponds to each slave node one by one, signal light of each slave node is received and transmitted to the corresponding slave node transmission module through one receiving and transmitting integrated antenna, and signals output by the slave node transmission module are directly transmitted to the slave node through the corresponding receiving and transmitting integrated antenna.
4. A dual wavelength based multi-node space laser communication method according to claim 2, wherein: the number of input ports and output ports of the wavelength conversion system, the number of input ports of the electronic system (5) and the number of output ports of the optical switch matrix (8) are the same as the number of slave node transmission modules.
5. A dual wavelength based multi-node space laser communication method according to claim 2, wherein: the wavelength conversion system comprises a data conversion module (6) and a plurality of optical modules (7), wherein each optical module (7) is provided with an input end, a data conversion end and an output end, the data conversion ends of the optical modules (7) are connected with the data conversion module (6) after the optical modules (7) are arranged in parallel, the output of one optical module (7) is used as an input port of the wavelength conversion system, and the output of one optical module (7) is used as an output port of the wavelength conversion system.
6. A dual wavelength based multi-node space laser communication method according to claim 2, wherein: the beam splitting parameters of the coupler (4) are designed according to actual conditions.
7. A dual wavelength based multi-node space laser communication method according to claim 2, wherein: an optical module (7) is arranged in the electronic system (5), the output of the optical module (7) is used as a second output port of the electronic system (5), the electronic system (5) generates master node signal light, and the master node signal light is transmitted to the optical switch matrix (8) through the second output port of the electronic system (5) after being subjected to signal conversion by the optical module (7).
8. A dual wavelength based multi-node space laser communication method according to claim 3, wherein: the electronic system (5) demodulates the transmitted signal light of a plurality of slave nodes and the special control field in the signal light of a master node and converts the demodulated signal light into a control sub-instruction of the optical switch, the control instruction consisting of the control sub-instructions is sent to a control port of the optical switch matrix (8) from a first output port, and the control instruction configures an optical path in the optical switch matrix (8).
9. A dual wavelength based multi-node space laser communication method according to claim 2, wherein: the number of input ports of the optical switch matrix (8) is one more than that of output ports of the optical switch matrix (8); the number of input ports of the optical switch matrix (8) in actual work does not exceed the number of output ports of the optical switch matrix (8); signals input from input ports of the optical switch matrix (8) must be output from one output port of the optical switch matrix (8).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115333626A (en) * | 2022-10-12 | 2022-11-11 | 鹏城实验室 | Laser beam identification method, terminal and storage medium for space optical communication |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020114036A1 (en) * | 2001-02-22 | 2002-08-22 | Nasir Ghani | Optical switching in dense wavelength division multiplexing (DWDM) fiber access nodes |
| US6570685B1 (en) * | 1998-03-03 | 2003-05-27 | Nec Corporation | Node for optical communication and wavelength-division multiplexing transmission apparatus having a ring structure composed of the same nodes |
| CN105490727A (en) * | 2015-11-26 | 2016-04-13 | 中国科学院半导体研究所 | Space laser communication forwarding system based on passive optical switch |
| WO2017157138A1 (en) * | 2016-03-18 | 2017-09-21 | 中兴通讯股份有限公司 | Method and apparatus for rf-signal exchange between antenna ports |
| CN108306684A (en) * | 2018-01-26 | 2018-07-20 | 浙江大学 | The two-way free space laser communication network system that a wide range of multinode receives simultaneously |
| CN111162903A (en) * | 2020-01-22 | 2020-05-15 | 华南师范大学 | Free space quantum key distribution system and method for aircraft |
-
2021
- 2021-01-28 CN CN202110116208.XA patent/CN112910550B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6570685B1 (en) * | 1998-03-03 | 2003-05-27 | Nec Corporation | Node for optical communication and wavelength-division multiplexing transmission apparatus having a ring structure composed of the same nodes |
| US20020114036A1 (en) * | 2001-02-22 | 2002-08-22 | Nasir Ghani | Optical switching in dense wavelength division multiplexing (DWDM) fiber access nodes |
| CN105490727A (en) * | 2015-11-26 | 2016-04-13 | 中国科学院半导体研究所 | Space laser communication forwarding system based on passive optical switch |
| WO2017157138A1 (en) * | 2016-03-18 | 2017-09-21 | 中兴通讯股份有限公司 | Method and apparatus for rf-signal exchange between antenna ports |
| CN108306684A (en) * | 2018-01-26 | 2018-07-20 | 浙江大学 | The two-way free space laser communication network system that a wide range of multinode receives simultaneously |
| CN111162903A (en) * | 2020-01-22 | 2020-05-15 | 华南师范大学 | Free space quantum key distribution system and method for aircraft |
Non-Patent Citations (6)
| Title |
|---|
| 吴钟乐等: "TMS320DM642在移动平台ATP技术中的应用", 《电子设计工程》 * |
| 姜会林等: "一点对多点同时空间激光通信光学跟瞄技术研究", 《中国激光》 * |
| 李睿等: "空间激光通信及其关键技术", 《应用光学》 * |
| 邹延聪等: "基于自由空间光通信技术的研究", 《通信技术》 * |
| 陈娅冰等: "自由空间中卫星激光通信", 《系统工程与电子技术》 * |
| 鹿鸣: "自由空间激光通信系统信号光捕获策略简析", 《科技信息》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115333626A (en) * | 2022-10-12 | 2022-11-11 | 鹏城实验室 | Laser beam identification method, terminal and storage medium for space optical communication |
| CN115333626B (en) * | 2022-10-12 | 2022-12-13 | 鹏城实验室 | Laser beam identification method, terminal and storage medium for space optical communication |
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