CN107809300A - A kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique - Google Patents
A kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique Download PDFInfo
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- CN107809300A CN107809300A CN201711047304.3A CN201711047304A CN107809300A CN 107809300 A CN107809300 A CN 107809300A CN 201711047304 A CN201711047304 A CN 201711047304A CN 107809300 A CN107809300 A CN 107809300A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0278—WDM optical network architectures
- H04J14/0282—WDM tree architectures
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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
-
- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
Abstract
The invention discloses a kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique.The multi-wavelength carrier signal of transmitting terminal, free space is incided through space fiber coupling device, projected afterwards by the first optical antenna is positive, the optical antenna of optical signals second focuses on different wave length optical signal through space wave decomposition multiplex device after receiving respectively, in different optical fiber in coupled into fiber array, then by the positive injection of the 3rd optical antenna group, the 4th optical antenna is sent to by atmospheric channel, reception is separately detected by the receiving module group of specific wavelength, realizes multipath signal propagation.The present invention makes the coverage of laser space communication system significantly expand, and solves the problems, such as the point-to-multipoint simultaneous transmission information of laser space communication list, significant to the networking technology of modern space laser communication.
Description
Technical field
The present invention relates to technology of Free-space Laser Communication, more particularly, to a kind of point based on wavelength-division de-multiplexing technique
To multiple spot laser space communication system.
Background technology
Free space laser communication refers to using laser as carrier, the optic communication of transfer data information in air or vacuum
Technology.As a kind of emerging communication technology, the advantages of free space laser communication combines fiber optic communication and microwave communication, tool
Have high speed, convenient, safety, networking flexibility, the unique advantage such as do not limited by traditional fiber shortcoming, be solve it is key in fiber optic communication
Net while also has to the effective way of user " last one kilometer " transmission bottleneck in the laser communication between Near Earth Orbit Satellites
Important application.
At this stage, the research comparative maturity on point-to-point free space laser communication system, still, for reality
Free space laser communication now more convenient, function is more powerful, the development of networking technology are imperative.Due to laser carrier
Frequency it is higher, directionality is very strong, while with advantages such as high speed, high securities, is also brought necessarily to networking technology
Difficulty.As the basis of networking technology, information transfer while first having to realize single point-to-multipoint.At present, carried both at home and abroad
Gone out some point-to-multipoint free space laser communication system schemes, such as Scott W.Sparrold seminars in 2005 propose with
Different angle launches optical signal and the networking that optical signal is sent to different receiving terminals by launch angle is increased in reflection cambered surface
Scheme, 2016 Nian Jianghui woodss seminars propose to build the same space-time of point to multi--point with the optical antenna of Novel rotary paraboloid surface type
Between laser communication system scheme etc., these network-building method efficiencies of light energy utilization are relatively low, increase to a certain extent to transmission
The requirement of power, while the DESIGN OF OPTICAL ANTENNA that these network-building methods need is complicated, adds technologic difficulty and cost.Cause
This, the present invention is proposed based on the point-to-multipoint information transfer of space wave decomposition multiplex device structure laser space communication list, for group
Net lays the foundation, and the program has that coverage is big, networking flexibility, and all nodes are that space may move node, can be met
The needs of the various occasions of laser space communication.
The content of the invention
It is an object of the invention to provide a kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique,
Free space laser transmission while can realizing single point-to-multipoint.
The technical solution adopted by the present invention is as follows：
The present invention includes transmitting terminal and receiving terminal, and transmitting terminal includes laser and the first optical antenna, laser and first
Optical antenna is connected by space optical coupling；Installation space wavelength-division demultiplexer systems, space wave between transmitting terminal and receiving terminal
Decomposition multiplex system includes the second optical antenna, the combination of space wave decomposition multiplex and the 3rd optical antenna group, the second optical antenna
Input receives the space optical signal launched from the first optical antenna, and the first optical antenna output end is through space wave decomposition multiplex
Combination connects with the 3rd optical antenna group, and the 3rd optical antenna group includes multiple antennas, launches through space wave decomposition multiplex group
Space optical signal after conjunction processing is to receiving terminal.
Described receiving terminal includes the 4th optical antenna group and receiving module group, the 4th optical antenna group and receiving module group
Connected by optical fiber, the 4th optical antenna group receives the space optical signal from the 3rd optical antenna group.4th optical antenna group
Including multiple antennas, receiving module group includes multiple receiving modules.
After 4th optical antenna group of the receiving terminal receives the optical signal from the 3rd optical antenna group, through space-
Fiber coupling device coupling is incided the detection of receiving module group and received respectively, obtains signal data.
In described space wave decomposition multiplex system, the combination of described space wave decomposition multiplex includes second space-optical fiber
Coupling device, Wave decomposing multiplexer part and fiber array, the second optical antenna pass through space through second space-fiber coupling device
Optical coupling is connected to the input of Wave decomposing multiplexer part, and Wave decomposing multiplexer part output end is connected to each input of fiber array
End, each output end of fiber array are connected with the 3rd optical antenna group by space optical coupling；The Wave decomposing multiplexer part will
The different wave length optical signal received carries out Wavelength branching, focuses on be coupled in the different optical fiber of fiber array respectively, optical signal
It is coupled into after free space optical and is projected respectively by the 3rd optical antenna group is positive.
The transmitting terminal includes laser, the first optical antenna, Polarization Controller, signal source, electrooptic modulator and first
Space-fiber coupling device, the output end of laser is successively through Polarization Controller, electrooptic modulator and the first space-optical fiber coupling
Attach together to put and be coupling-connected to the first optical antenna, signal source is connected to electrooptic modulator；What the laser of the transmitting terminal was sent
Optical signal is input in electrooptic modulator after Polarization Controller polarization regulation, and electrooptic modulator adds the data signal of signal source
Load is modulated on optical signal, is then communicated to the first space-fiber coupling device, and first couples through space-fiber coupling device
Projected after into free space optical by the first optical antenna is positive.
The fiber array includes 2 and above difference optical fiber, and each optical fiber focuses on the optical signal for receiving different wave length.
In number of fibers in the fiber array, the antenna amount in the 3rd optical antenna group, the 4th optical antenna group
Antenna amount, the receiving device quantity all same in receiving module group.
The receiving module group is can to receive and demodulate the receiver terminal of specific wavelength signal.
Described receiving module group is determined by electrooptic modulator modulation type to select structure type.
The present invention is used based on core devices of the space wave decomposition multiplex device as free space laser communication networking, can
Realize a point-to-multipoint free space laser transmission.The present invention realizes simultaneously while networking technology complexity is reduced
Over long distances, low-power consumption and light-weighted single point-to-multipoint free space laser transmission, make the coverage of space communication system big
Width expands, and is transmitted while realizing multiple spot multi signal, while the launch point of the present invention, and intermediate transit point and each receiving point are all spaces
Node, free space transmission truly is realized, this is significant to modern space laser light constructing communication network.
The beneficial effects of the invention are as follows：
Free space laser transmission while single point-to-multipoint can be achieved in the present invention, and the efficiency of light energy utilization is high, increases freedom
The coverage of space optical communication system, the coverage of laser space communication system is set significantly to expand.
The space wave decomposition multiplex device that the present invention uses makes whole system simple in construction, and small volume, in light weight, coupling
Efficiency high, solve the problems, such as the point-to-multipoint simultaneous transmission information of laser space communication list, provided for laser space communication networking
Core devices are supported, significant.
Brief description of the drawings
Fig. 1 is the attachment structure schematic diagram in present system.
Fig. 2 is the structural representation of the transmitting end module in present system.
Fig. 3 is the structural representation of the space wave decomposition multiplex system in present system.
In figure：1 is laser, and 2 be the first optical antenna, and 3 be the second optical antenna, and 4 be that space wave decomposition multiplex combines,
5 be the 3rd optical antenna group, and 6 be the 4th optical antenna group, and 7 be receiving module group, and 8 be Polarization Controller, and 9 be signal source, 10
It is the first space-fiber coupling device for electrooptic modulator, 11,12 be second space-fiber coupling device, and 13 demultiplex for wavelength-division
It is fiber array with device, 14.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, present invention specific implementation includes transmitting terminal and receiving terminal, set between transmitting terminal and receiving terminal empty
Between wavelength-division demultiplexer systems.
Adjusted as shown in Fig. 2 transmitting terminal includes laser 1, the first optical antenna 2, Polarization Controller 8, signal source 9, electric light
Device 10 and the first space-fiber coupling device 11 processed, the output end of laser 1 is successively through Polarization Controller 8, electrooptic modulator 10
The first optical antenna 2 is coupling-connected to the first space-fiber coupling device 11, signal source 9 is connected to electrooptic modulator 10；Institute
State the optical signal that the laser 1 of transmitting terminal is sent to be input in electrooptic modulator 10 after the polarization regulation of Polarization Controller 8, electric light
Modulator 10 is then communicated to the first space-fiber coupling device by the data signal load-modulate of signal source 9 to optical signal
11, first is projected after space-fiber coupling device 11 is coupled into free space optical by the first optical antenna 2 is positive.
As shown in figure 1, receiving terminal includes the 4th optical antenna group 6 and receiving module group 7, the 4th optical antenna group 6 and connect
Receive module group 7 to connect by optical fiber, the 4th optical antenna group 6 receives the space optical signal from the 3rd optical antenna group 5.4th
Optical antenna group 6 includes multiple antennas, and receiving module group 7 includes multiple receiving modules.4th optical antenna group 6 of receiving terminal connects
After receiving the optical signal from the 3rd optical antenna group 5, receiving module group is incided respectively through space-fiber coupling device coupling
7 detections receive, and obtain signal data.
As shown in figure 3, space wave decomposition multiplex system includes the second optical antenna 3, space wave decomposition multiplex combination 4 and the
Three optical antenna groups 5, the input of the second optical antenna 3 receive the space optical signal launched from the first optical antenna 2, the first light
Learn the output end of antenna 2 to connect through the combination 4 of space wave decomposition multiplex and the 3rd optical antenna group 5, the bag of space wave decomposition multiplex combination 4
Second space-fiber coupling device 12, Wave decomposing multiplexer part 13 and fiber array 14 are included, the second optical antenna 3 is empty through second
M- fiber coupling device 12 is connected to the input of Wave decomposing multiplexer part 13, Wave decomposing multiplexer part by space optical coupling
13 output ends are connected to each input of fiber array 14, and each output end and the 3rd optical antenna group 5 of fiber array 14 pass through
Space optical coupling connects；The different wave length optical signal received is carried out Wavelength branching by the Wave decomposing multiplexer part 13, respectively
Focusing is coupled in the different optical fiber of fiber array 14, and optical signal is coupled into after free space optical respectively by the 3rd optical antenna group
5 positive injections.
In the specific implementation of the present invention, the multiple-wavelength laser of communication band is may be selected in laser, and space Wave Decomposition is answered
Existing all kinds of wavelength de-multiplexer or multiplexer devices can be selected with device, such as optical-fiber type wavelength-division optical multiplexer or demultiplexer
(CWDM/DWDM) film-type Wave decomposing multiplexer, based on super structure surface etc., it is accurate that existing various spatial lights can be selected in optical antenna
Straight device and system, such as lens, optical telescope, signal source, electrooptic modulator, Polarization Controller, space-fiber coupling
Various business components can be selected in device, demodulator, photodetector.
The multi-wavelength light carrier wave of apparatus of the present invention is provided by laser 1, loads signal by electrooptic modulator 10, first is empty
The coupling of m- fiber coupling device 11 and second space-fiber coupling device 12 for light between free space and optical fiber, first
Optical antenna 2, the second optical antenna 3, the 3rd optical antenna group 5 and the 4th optical antenna group 6 are used for the transmitting of free space optical
And reception.
Embodiments of the invention are as follows：
Laser sends the optical signal warp that four road wavelength are respectively 1548.5nm, 1549.3nm, 1550.1nm, 1550.9nm
Be input to after Polarization Controller in electrooptic modulator, electrooptic modulator is connected with signal source, signal source produce 10_Gb/s it is pseudo- with
Machine binary sequence is loaded on electrooptic modulator to simulate the modulated signal in practical application and produces QPSK
Signal (QPSK), QPSK signal are coupled to free space by space-fiber coupling device, by the first optical antenna
Forward direction transmission, space propagation.
After second optical antenna of wavelength-division demultiplexer systems receives the optical signal projected from the first optical antenna, by light
Fine type dense wavelength division demultiplexer (DWDM) carries out wavelength separated, and four road different wave length optical signals are respectively coupled into fiber array
Different optical fiber in.4 road optical signals are after space-fiber coupling device is coupled into free space optical respectively respectively by the 3rd optics
Antenna sets are positive to be projected.After 4th optical antenna group of receiving terminal receives the optical signal from the 3rd optical antenna group, through sky
M- fiber coupling device coupling is incided receiving module group and received by demodulator and photodetector demodulation detection respectively, obtains
Signal data.
Embodiment in foregoing description can further change wavelength, different wave length carrier number and transmission rate etc., and
Embodiment is only that the preferred embodiment of patent of the present invention is described, and not the spirit and scope of patent of the present invention are entered
Row limits, and on the premise of Patent design thought of the present invention is not departed from, professional and technical personnel in the art are to patent of the present invention
The various changes and modifications that technical scheme is made, belong to protection scope of the present invention.
Claims (5)
1. a kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique, including transmitting terminal and receiving terminal, hair
Penetrating end includes laser (1) and the first optical antenna (2), and laser (1) and the first optical antenna (2) are connected by space optical coupling
Connect；It is characterized in that：The installation space wavelength-division demultiplexer systems between transmitting terminal and receiving terminal, space wave decomposition multiplex system bag
It is defeated to include the second optical antenna (3), space wave decomposition multiplex combination (4) and the 3rd optical antenna group (5), the second optical antenna (3)
Enter end and receive the space optical signal launched from the first optical antenna (2), the first optical antenna (2) output end is through space Wave Decomposition
Multiplexed combinations (4) and the connection of the 3rd optical antenna group (5), the 3rd optical antenna group (5) are launched through space wave decomposition multiplex group
The space optical signal after (4) processing is closed to receiving terminal.
2. a kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique according to claim 1, its
It is characterised by：In described space wave decomposition multiplex system, described space wave decomposition multiplex combination (4) include second space-
Fiber coupling device (12), Wave decomposing multiplexer part (13) and fiber array (14), the second optical antenna (3) through second space-
Fiber coupling device (12) is connected to the input of Wave decomposing multiplexer part (13), Wave decomposing multiplexer part by space optical coupling
(13) output end is connected to each input of fiber array (14), each output end and the 3rd optical antenna group of fiber array (14)
(5) connected by space optical coupling；The different wave length optical signal received is carried out wavelength by the Wave decomposing multiplexer part (13)
Branch, focus on be coupled in the different optical fiber of fiber array (14) respectively, optical signal is coupled into after free space optical respectively by the
Three optical antenna groups (5) are positive to be projected.
3. a kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique according to claim 1, its
It is characterised by：Described receiving terminal includes the 4th optical antenna group (6) and receiving module group (7), the 4th optical antenna group (6) and
Receiving module group (7) is connected by optical fiber, and the 4th optical antenna group (6) receives the spatial light from the 3rd optical antenna group (5)
Signal.
4. a kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique according to claim 1, its
It is characterised by：The transmitting terminal includes laser (1), the first optical antenna (2), Polarization Controller (8), signal source (9), electric light
Modulator (10) and the first space-fiber coupling device (11), the output end of laser (1) is successively through Polarization Controller (8), electricity
Optical modulator (10) and the first space-fiber coupling device (11) are coupling-connected to the first optical antenna (2), and signal source (9) is even
It is connected to electrooptic modulator (10)；The optical signal that the laser (1) of the transmitting terminal is sent is after Polarization Controller (8) polarization regulation
Be input in electrooptic modulator (10), electrooptic modulator (10) by the data signal load-modulate of signal source (9) to optical signal,
The first space-fiber coupling device (11) is then communicated to, first is coupled into free space through space-fiber coupling device (11)
Projected after light by the first optical antenna (2) is positive.
5. a kind of point-to-multipoint laser space communication system based on wavelength-division de-multiplexing technique according to claim 1, its
It is characterised by：The fiber array (14) includes two and above difference optical fiber, and each optical fiber, which focuses on, receives different wave length
Optical signal.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108365893A (en) * | 2018-04-17 | 2018-08-03 | 武汉六博光电技术有限责任公司 | A kind of remote-wireless laser WIFI communication systems and method |
| CN111610626A (en) * | 2020-05-29 | 2020-09-01 | 中国科学院长春光学精密机械与物理研究所 | Antenna structure capable of realizing simultaneous and continuous multi-path laser communication |
| CN112543059A (en) * | 2020-12-09 | 2021-03-23 | 长春理工大学 | Common receiving optical path wireless laser communication networking antenna |
| WO2021147279A1 (en) * | 2020-01-23 | 2021-07-29 | 维沃移动通信有限公司 | Radio frequency front-end circuit and electronic device |
| CN114499665A (en) * | 2022-03-10 | 2022-05-13 | 鹏城实验室 | Many-to-many laser communication networking device and method |
| CN117560079A (en) * | 2024-01-12 | 2024-02-13 | 鹏城实验室 | Transmit-receive isolation system and laser communication system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365893A (en) * | 2018-04-17 | 2018-08-03 | 武汉六博光电技术有限责任公司 | A kind of remote-wireless laser WIFI communication systems and method |
| CN108365893B (en) * | 2018-04-17 | 2024-04-16 | 武汉六博光电技术有限责任公司 | Remote wireless laser WIFI communication system and method |
| WO2021147279A1 (en) * | 2020-01-23 | 2021-07-29 | 维沃移动通信有限公司 | Radio frequency front-end circuit and electronic device |
| CN111610626A (en) * | 2020-05-29 | 2020-09-01 | 中国科学院长春光学精密机械与物理研究所 | Antenna structure capable of realizing simultaneous and continuous multi-path laser communication |
| CN112543059A (en) * | 2020-12-09 | 2021-03-23 | 长春理工大学 | Common receiving optical path wireless laser communication networking antenna |
| CN112543059B (en) * | 2020-12-09 | 2022-03-29 | 长春理工大学 | Common receiving optical path wireless laser communication networking antenna |
| CN114499665A (en) * | 2022-03-10 | 2022-05-13 | 鹏城实验室 | Many-to-many laser communication networking device and method |
| WO2023168952A1 (en) * | 2022-03-10 | 2023-09-14 | 鹏城实验室 | Many-to-many laser communication deployment apparatus and method |
| US11967990B2 (en) | 2022-03-10 | 2024-04-23 | Peng Cheng Laboratory | Many-to-many laser communication networking device and method |
| CN117560079A (en) * | 2024-01-12 | 2024-02-13 | 鹏城实验室 | Transmit-receive isolation system and laser communication system |
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