CN107911162A - The non-interfering full duplex space high speed communication apparatus of dicode type based on modulator - Google Patents
The non-interfering full duplex space high speed communication apparatus of dicode type based on modulator Download PDFInfo
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- CN107911162A CN107911162A CN201711045308.8A CN201711045308A CN107911162A CN 107911162 A CN107911162 A CN 107911162A CN 201711045308 A CN201711045308 A CN 201711045308A CN 107911162 A CN107911162 A CN 107911162A
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- electrooptic modulator
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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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
-
- 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
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
- H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
- H04B10/5561—Digital phase modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
Abstract
The invention discloses a kind of non-interfering full duplex space high speed communication apparatus of the dicode type based on modulator.The upper signal of the first electrooptic modulators of combination of multi-path laser Shu Houjing modulation in base station, flashlight receives end module the first of terminal by space propagation rear portion and receives detection, that is downlink transfer, another part flashlight incides the second electrooptic modulator and carries out re-modulation, the second receiving terminal through former road retrodirective reflection to base station carries out the reception detection of re-modulation signal, i.e. uplink.The present invention utilizes the High Speed Modulation of modulator, greatly improve the transmission rate of uplink signal, realize the space communication of single channel downlink and the full duplex of up-high speed rate, it can meet the demand of transmission and processing of the space communication to two-way communication and high-speed high capacity data, have important practical significance to the two-way technology of Free-space Laser Communication of high-speed high capacity long range of future generation.
Description
Technical field
It is especially a kind of based on the inverse of modulator the present invention relates to a kind of device of full duplex free space high-speed communication
To the reflection non-interfering full duplex space high speed communication apparatus of dicode type.
Background technology
Free space laser communication system refers to using laser light wave as carrier, air as medium transmission voice, data,
The optical communication system of the information such as image.Compared with traditional spatial microwave communication, free space laser communication combines optical fiber and leads to
The advantages of letter and microwave communication, not only used a laser as carrier wave and ensured big message capacity, high rate data transmission, but also using the logical of space
Letter mode, freedom and flexibility, between mobile target, between fixed target, between mobile target and fixed target and some not
The region of optical fiber is preferably laid with, as between satellite and satellite, satellite and ground, satellite and aircraft, island, extra large land and rivers two sides
Communication etc. etc. have great application potential；At civilian aspect, the bottleneck of in the market mass data transfers is also badly in need of solving
Certainly.Free space laser communication is because its conveyor is roomy, good concealment is not easy to be trapped, direction type is good, strong antijamming capability, body
The advantages that product is small, light-weight, is the most competitive technological approaches of Space-based information transmission.
Base station and terminal are required for loading Laser emission/reception and automatic track aiming in traditional radio optical communication system
Acquisition equipment, adds the volume and weight of equipment and the complexity of technology to a certain extent.Using single light source conduct
Carrier wave, light source is placed on base station, then can remove the laser emitter and automatic track aiming acquisition equipment of terminal from, mitigates terminal
Volume, weight and the power consumption of equipment, effectively reduce the application limitation of laser space communication system.Although existing certain methods can
Realize the transmission of two-way signaling under single light source, but universal transmission rate is relatively low, and highest only up to 1.25 gigabit/secs, can not break through
The speed of transmitted in both directions all reaches the bottleneck of 10 gigabit/secs.
The content of the invention
In order to solve the problems, such as present in background technology, object of the present invention is to provide a kind of double based on modulator
The non-interfering full duplex space high speed communication apparatus of pattern, downlink and uplink are all using electrooptic modulator as modulator
Part, the ingenious combination using optical circulator and modulator realize two-way speed up to the full duplex of modulator highest modulation rate
Space communication, and can be as needed in base station wavelength-division multiplex room for promotion amount of communication data.The present invention is reducing terminal device
While technical sophistication degree and power consumption, the space transmitted in both directions of high-speed is realized, meets laser space communication skill at this stage
The needs of art development.
The technical solution adopted by the present invention is to include base station and terminal：
Continuously swash including the first continuous wave laser, the second continuous wave laser, the 3rd continuous wave laser, n-th base station
Light device, the first Polarization Controller, the second Polarization Controller, the 3rd Polarization Controller, m Polarization Controllers, combiner device, first
Signal source, the first electrooptic modulator, the first optical circulator, the first space-fiber coupling device, the first optical antenna, the 3rd light
Wave filter, the second optical attenuator and second receive end module；First continuous wave laser, the second continuous wave laser, the 3rd continuously swash
Light device ..., the laser that sends of the n-th continuous wave laser is respectively through respective first Polarization Controller, the second Polarization Controller, the 3rd
Polarization Controller ..., be input to by combiner device in the first electrooptic modulator after m Polarization Controllers, the first Electro-optical Modulation
By cable connection, the output terminal of the first electrooptic modulator is connected to the first end of the first optical circulator for device and the first signal source
Mouthful, the second port of the first optical circulator is connected to the first space-fiber coupling device and is connected by optical fiber, the first space-light
Fine coupling device and the first optical antenna are connected by space optical coupling, and the 3rd port of the first optical circulator passes through the 3rd successively
It is connected after optical filter, the second optical attenuator with the second reception end module.
The terminal includes the second optical antenna, second space-fiber coupling device, the second optical circulator, light amplification
Device, the first optical filter, photo-coupler, the second optical filter, the first optical attenuator, first receive end module, the 4th polarization control
Device, secondary signal source and the second electrooptic modulator processed；The output terminal and second space-fiber coupling device of second optical antenna lead to
Space optical coupling connection is crossed, second space-fiber coupling device is connected to the second port of the second optical circulator, the second ring of light shape
3rd port of device is connected to the input terminal of photo-coupler after image intensifer, the first optical filter successively, photo-coupler
One output terminal is connected to the first reception end module after the second optical filter, the first optical attenuator successively, photo-coupler it is another
One output terminal is input in the second electrooptic modulator after the 4th Polarization Controller, the second electrooptic modulator and secondary signal source
By cable connection, the output terminal of the second electrooptic modulator is connected to the first port of the second optical circulator.
Present invention is particularly suitable for being transmitted in space channel, full duplex space height can be completed well in space channel
Rate communication.Space channel specific implementation refers to atmospheric medium.
The base station and terminal is respectively placed in the both sides of space channel, from the signal that base station is sent by the first space-
Fiber coupling device is coupled into free space optical, is then emitted to space channel from the first optical antenna, and pass through space channel
The second optical antenna for arriving terminal after defeated again is received；Pass through second space-fiber coupling device coupling from the signal that terminal is sent
Free space optical is synthesized, is then emitted to space channel from the second optical antenna, and base station is arrived again after space channel transmits
First optical antenna is received.
In the first optical circulator and the second optical circulator of the present invention, first port input can be coupling-connected to second port
Output, second port input can be coupling-connected to the output of the 3rd port, and it is defeated that the input of the 3rd port is not coupling-connected to first port
Go out.
The light that the continuous wave laser of the base station is sent is input to after Polarization Controller and combiner device wavelength-division multiplex
In first electrooptic modulator, the first electrooptic modulator forms flashlight by a kind of upper pattern signal of the first signal source loading, makees
For downlink signal, then it is transferred to through the first optical circulator after the first space-fiber coupling device is coupled into free space optical, by
First optical antenna forward direction injects to space channel；Second optical antenna of the terminal is received from by space channel
After the optical signal of one optical antenna, incided through second space-fiber coupling device coupling in the second optical circulator, successively through light
The amplification of amplifier, the first optical filter enters photo-coupler after filtering, and spread out of a part of flashlight from photo-coupler passes through successively
Cross after the algorithm processing of the second optical filter, the first optical attenuator and receive end module reception detection by first, obtain downlink
Signal data；Another part flashlight, which is spread out of, from photo-coupler reloads another pattern letter through the modulation of the second electrooptic modulator
The second optical circulator is output to after number, as uplink signal, re-modulated signals light is transferred to second through the second optical circulator
Space-fiber coupling device is coupled back into free light space, finally by the reverse retroeflection of the second optical antenna into space channel, retroeflection
Flashlight received successively by the first optical antenna of base station and be coupled back into the first space-fiber coupling device, then by first
End module is received by second to receive, obtain uplink signal data after optical circulator, the 3rd optical filter, the second optical attenuator.
The present invention is modulated with a kind of signal of pattern after multi-path laser carrier wave is closed beam, and space is built with two optical circulators
The transmitted in both directions of communication, a light part for one of output terminal output of optical circulator are used for demodulating, and another part is used and this
The non-interfering pattern of kind pattern carries out re-modulation, inversely transfers back to base station, carries out the demodulation of this kind of pattern signal.
The signal of first electrooptic modulator and the second electrooptic modulator difference load-modulate difference pattern so that uplink signal
It is not interfere with each other with descending type number type, realizes effective transmission of signal.In specific implementation, two electrooptic modulator load-modulate codes
Intensity-coded signals or phase-coded signal can be respectively adopted in the signal of type, both are interchangeable.
The transformat of the downlink signal is modulated with transmission rate by the modulation type and highest of the first electrooptic modulator
Speed determines that wherein transformat can be phase-coded signal or intensity-coded signals, transmission rate at least up to 10 gigabits/
Second；The transformat of the uplink signal is determined with transmission rate by the modulation type and highest modulation rate of the second electrooptic modulator
Fixed, wherein transformat can for intensity-coded signals different with downlink pattern signal or phase-coded signal, transmission rate
Up to gigabit/sec.The uplink signal light of second electrooptic modulator re-modulation can will again by the loop configuration of the second circulator
Modulation is reflected back space-fiber coupling device with the different flashlight of downlink pattern signal.
The first reception end module is determined by the first electrooptic modulator modulation type：If the first electrooptic modulator is modulated
Type is phase-coded signal, then first receives end module and include the 5th Polarization Controller, phase-coded signal demodulator and the
One photodetector, the output terminal of photo-coupler successively through the second optical filter, the first optical attenuator, the 5th Polarization Controller,
The first photodetector is input to after phase-coded signal demodulator and receives detection；If the first electrooptic modulator modulation type is strong
Encoded signal is spent, then the first receiving module uses the second photodetector.
The second reception end module is determined by the second electrooptic modulator modulation type：If the second electrooptic modulator is modulated
Type is intensity-coded signals, then the second reception end module uses the second photodetector；If the second electrooptic modulator modulates class
Type is phase-coded signal, then the second reception end module includes the 5th Polarization Controller, phase-coded signal demodulator and first
Photodetector, the output terminal of photo-coupler is successively through the second optical filter, the first optical attenuator, the 5th Polarization Controller, phase
The first photodetector, which is input to, after the encoded signal demodulator of position receives detection.
The present invention is to modulate a kind of upper signal of pattern after multi-path laser carrier wave is closed beam, is held signal by wavelength-division multiplex
Amount increase.And the transmitted in both directions of space communication is built with two optical circulators and electrooptic modulator, wherein the one of optical circulator
A light part for a output terminal output is used for demodulating, and another part carries out re-modulation with the non-interfering pattern of this pattern,
Base station inversely is transferred back to, carries out the demodulation of this kind of pattern signal.Carried out with optical circulator and electrooptic modulator collocation mode this
Processing substantially reduces volume compared to the optical signal transmission of existing prism, reduces power consumption.
The uplink signal light of second electrooptic modulator re-modulation of the invention can be reflected back the second sky by the second circulator
M- fiber coupling device, since downlink from the encoded signal of uplink is different types, so the letter for re-modulation
Number, it can completely demodulate and after uplink, realize the non-interfering full duplex free space laser of dicode type
Communication.
The beneficial effects of the invention are as follows：
The full duplex free space laser communication of two-way at least 10 gigabit/secs of the achievable single channel of the present invention, transmission rate
Height, can be greatly enhanced the transmission rate of two-way free space laser communication system, and transmission rate is not only restricted to system, can reach
To the flank speed of modulator.
The present invention is made multichannel light carrier using wavelength-division multiplex on the basis of single channel while carries signal, through space channel
The demodulation of signal is carried out after transmission in terminal, another non-interfering pattern signal in the light modulation that retrodirective reflection is gone back,
Base station is demodulated.
Terminal device of the present invention is small, low in energy consumption, complexity is low, both so that the signal volume of space propagation increases, into
And realize the full duplex laser space communication of high-speed, can be that the full-duplex communication of laser space communication and the requirement of high-speed carry
For reference, the demand of transmission and processing of the space communication to two-way communication and high-speed high capacity data can be met, for full duplex
High-speed laser space communication significance.
Brief description of the drawings
Fig. 1 is the attachment structure schematic diagram of apparatus of the present invention.
Fig. 2 is the structure diagram of the reception end module of apparatus of the present invention.
Fig. 3 is the structure diagram of the reception end module of apparatus of the present invention.
Fig. 4 is the eye pattern that signal downlink signal measures after space channel transmits in the embodiment of the present invention.
Fig. 5 is the eye pattern that uplink signal measures after the transmission of free space laser in the embodiment of the present invention.
In figure：1 is the first continuous wave laser, 2 be the second continuous wave laser, 3 be the 3rd continuous wave laser, N be n-th continuous
Laser, 4 be the first Polarization Controller, 5 be the second Polarization Controller, 6 be the 3rd Polarization Controller, M be m Polarization Controls
Device, 7 be combiner device, 8 be the first signal source, 9 be the first electrooptic modulator, 10 be the first optical circulator, 11 be the first space-
Fiber coupling device, 12 be the first optical antenna, 13 be space channel, 14 be the second optical antenna, 15 be second space-optical fiber
Coupling device, 16 be the second optical circulator, 17 be image intensifer, 18 be the first optical filter, 19 be photo-coupler, 20 be second
Optical filter, 21 be the first optical attenuator, 22 be the first reception end module, 23 be the 4th Polarization Controller, 24 be secondary signal
Source, 25 be the second electrooptic modulator, 26 be the 3rd optical filter, 27 be the second optical attenuator, 28 be the second reception end module, 29
It is phase-coded signal demodulator for the 5th Polarization Controller, 30,31 be the first photodetector, 32 is the second photodetection
Device.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, full duplex system specific implementation of the present invention includes base station and terminal.
As shown in Figure 1, base station includes the first continuous wave laser 1, the second continuous wave laser 2, the 3rd continuous wave laser 3, n-th
Continuous wave laser N, the first Polarization Controller 4, the second Polarization Controller 5, the 3rd Polarization Controller 6, m Polarization Controllers M, light
Bundling device 7, the first signal source 8, the first electrooptic modulator 9, the first optical circulator 10, the first space-fiber coupling device 11,
One optical antenna 12, the 3rd optical filter 26, the second optical attenuator 27 and the second receiving terminal 28；First continuous wave laser 1, second
Continuous wave laser 2, the 3rd continuous wave laser 3 ..., the laser that sends of the n-th continuous wave laser N controls through the respective first polarization respectively
Device 4 processed, the second Polarization Controller 5, the 3rd Polarization Controller 6 ..., be input to by combiner device 7 after m Polarization Controllers M
In first electrooptic modulator 9, the first electrooptic modulator 9 and the first signal source 8 are defeated by cable connection, the first electrooptic modulator 9
Outlet is connected to the first port of the first optical circulator 10, and the second port of the first optical circulator 10 is connected to the first space-light
Fine coupling device 11, the first space-fiber coupling device 11 is connected with the first optical antenna 12 by space optical coupling, through first
Optical antenna 12 is emitted；3rd port of the first optical circulator 10 is successively by the 3rd optical filter 26, the second optical attenuator 27
It is connected afterwards with the second reception end module 28.
As shown in Figure 1, terminal includes the second optical antenna 14, second space-fiber coupling device 15, the second optical circulator
16th, image intensifer 17, the first optical filter 18, photo-coupler 19, the second optical filter 20, the first optical attenuator 21, first connect
Receiving end 22, the 4th Polarization Controller 23,24 and second electrooptic modulator 25 of secondary signal source；Second optical antenna 14 and second is empty
M- fiber coupling device 15 is connected by space optical coupling, and second space-fiber coupling device 15 is connected to the second optical circulator
16 second port, the 3rd port of the second optical circulator 16 connect after image intensifer 17, the first optical filter 18 successively
To the input terminal of photo-coupler 19, an output terminal of photo-coupler 19 is successively through the second optical filter 20, the first optical attenuator
It is connected after 21 with the first reception end module 22, another output terminal of photo-coupler 19 is input to after the 4th Polarization Controller 23
In second electrooptic modulator 25, the second electrooptic modulator 25 passes through cable connection, the second electrooptic modulator with secondary signal source 24
25 output terminal is connected to the first port of the second optical circulator 16.
As shown in Fig. 2, when the modulation format of the first electrooptic modulator 9 or the second electrooptic modulator 25 is believed for phase code
Number when, corresponding first receives end module 22 or including the 5th Polarization Controller 29, phase-coded signal demodulator 30 and the
One photodetector 31；The output terminal of photo-coupler 19 is polarized through the second optical filter 20, the first optical attenuator the 21, the 5th successively
It is connected after controller 29, phase-coded signal demodulator 30 with the first photodetector 31.
As shown in figure 3, when the modulation format of the first electrooptic modulator 9 or the second electrooptic modulator 25 is believed for intensity coding
Number when, it is corresponding first receive end module 22 or second receive end module 28 use the second photodetector 32, second ring of light
Shape device 10 is connected through the 3rd wave filter 26 and the second optical attenuator 27 with the second photodetector 32.
In the present invention, the various lasers of communication band may be selected in laser, and existing various skies can be selected in optical antenna
Between light collimation device and system, such as lens, optical telescope, electrooptic modulator, Polarization Controller, combiner device, the ring of light
Row device, space-fiber coupling device, optical filter, photo-coupler, tunable optical power attenuator, phase-coded signal demodulation
Various business components can be selected in device, photodetector.
Principle of device schematic diagram proposed by the present invention is as shown in Figure 1.The flashlight of apparatus of the present invention is by the first continuous laser
Device 1, the second continuous wave laser 2, the 3rd continuous wave laser 3 and the n-th continuous wave laser N are provided, and beam, letter are closed by combiner device 7
Number loaded through the first electrooptic modulator 9 by the first signal source 8.The light that continuous wave laser is sent is through Polarization Controller and combiner device
After 7 wavelength-division multiplex, flashlight then is formed in the first electrooptic modulator 9 loading upper switch keying signal, as downlink signal, so
The first space-fiber coupling device 11 is transferred to by the first optical circulator 10 and is coupled into free space optical, incides the first light
Space channel 13 is emitted to after learning antenna 12, then is received after the transmission of space channel 13 by the second optical antenna 14；Second optics
The flashlight that antenna 14 receives is transferred to second space-fiber coupling device 15 and is coupled in the second optical circulator 16, and according to
It is secondary to enter photo-coupler 19 after the amplification filtering of image intensifer 17, the first optical filter 18, spread out of one from photo-coupler 19
Sub-signal light successively the second optical filter 20, the first optical attenuator 21 algorithm processing after by first reception end module 22 connect
Receive, carry out the demodulation of downlink signal.Another part flashlight is spread out of from photo-coupler 19 through the second electrooptic modulator 25 again to add
The second optical circulator 16 is output to after carrying differential phase keying (DPSK) signal, as uplink signal, is then passed through the second optical circulator 16
It is defeated to be coupled back into free light space to second space-fiber coupling device 15, finally by 14 reverse retroeflection of the second optical antenna to sky
Between in channel 13, the flashlight of retroeflection is received by the first optical antenna 12 of base station and incides the first space-optical fiber coupling successively
Attach together and put 11, then end module is received by second after the first optical circulator 10, the 3rd optical filter 26, the second optical attenuator 27
28 receive, and carry out the demodulation of uplink signal.
The signal of downlink is transmitted to terminal by space channel, and the received signal of end-on is demodulated, separates at the same time
Part light carries out re-modulation, and the uplink signal of modulation is demodulated uplink signal in base station after space channel.For sky
Between for channel so that uplink signal and downlink model can be separated as two different types of signals and transmitted, from other side
Interference so that can be simultaneously accurately demodulated in base station and terminal to two kinds of signal.
In the present invention, the first space-fiber coupling device 11 and second space-fiber coupling device 15 are used for free space
The coupling of light between optical fiber, the first optical antenna 12 and the second optical antenna 14 are used for the transmitting and reception of free space optical.
For receiving end module, in Fig. 2, receive end module and demodulated by the 5th Polarization Controller 29, phase-coded signal
30 and first photodetector 31 of device is formed, and the reception for phase-coded signal detects；In Fig. 3, receive end module and only have
One photodetector 32, the reception for intensity-coded signals detect.Which kind of reception end module is selected to depend on the first electric light
The modulation format of 9 and second electrooptic modulator 25 of modulator.
The present invention is with the downstream differential phase shift keyed signal (DPSK) of 10 gigabit/sec of modulation transmissions and 10 gigabit/secs
Upstream switch keying signal (OOK) two-way wavelength-division multiplex (WDM) exemplified by carry out experimental verification.
The line width for the first and second continuous wave lasers that the present invention chooses all is 100 kHz, and the wavelength of flashlight is distinguished
For 1550.1 and 1550.9 nanometers.Using Mach, once moral phase-modulator, the first signal source are sent first electrooptic modulator
To simulate the modulated signal in practical application, pseudo noise code length is the pseudo-random binary sequence of 10 gigabit/secs all the way
215- 1, it is loaded into by the first electrooptic modulator on light wave, produces the differential phase keying (DPSK) signal of downlink.Downlink carries difference
The flashlight of phase shift keyed signals is coupled to free space by the first space-fiber coupling device, by the first optical antenna
Forward direction transmission is carried out after being received by the second optical antenna after space propagation, then filled by second space-fiber coupling to space channel
Put coupled back into optical fibers into image intensifer and wave filter amplification filtering after, be transferred to 2:Two parts are splitted the light into 8 coupler,
The small light all the way of ratio is used for demodulating, and the direct detection in the first receiving terminal using differential phase keying (DPSK) signal, passes through phase
Position encoded signal demodulator demodulates phase information to come, and passes through the first photodetector of luminous power of deamplification light
Receive changed power and carry out signal detection accordingly, the letter of the downstream differential phase-shift keying (PSK) after free space transmission of detection
Number eye pattern it is as shown in Figure 4.After two-way wavelength-division multiplex, signal data amount doubles to become 20 gigabit/secs.
The coupling of optical fiber and space channel passes through the first space-fiber coupling device and second space-fiber coupling device
Complete, the transmitting and reception of free space optical are completed by the first optical antenna and the second optical antenna, and space channel is a length of
3.5m。
The light of another way large percentage is used for carrying out the reverse modulation of uplink signal, and the modulation of uplink signal uses on ＆ off switch
Signal is controlled, once DS intensity modulators, secondary signal source send 10 gigabit/sec all the way to the second electrooptic modulator using Mach
Pseudo-random binary sequence, pseudo noise code length be 215- 1, it is loaded into by the second electrooptic modulator on light wave, the code of generation
Type is on-off keying signal.By being coupled to free space channel into second space-fiber coupling device after circulator, by
After two optical antenna forward direction transmissions, space propagation, the first optical antenna receive, it is coupled back into by the first space-fiber coupling device
Optical fiber is simultaneously detected with photodetector, upstream switch keying signal eye pattern such as Fig. 5 institutes after free space transmission of detection
Show.Due to equally there is two wavelength, obtained data volume also doubles into 20 gigabit/secs.
Second receiving terminal passes through the luminous power of deamplification light using the direct detection for keying signal of opening the light
The reception changed power of one photodetector simultaneously carries out signal detection accordingly.In this way, the differential phase keying (DPSK) signal of downlink and
The on-off keying signal of uplink is completed to transmit at the same time in space, and the speed transmitted all is 10 gigabit/sec of single channel, passes through two-way
After wavelength-division multiplex, growth all at double becomes 20 gigabit/secs.
The Mach of the embodiment of the present invention once the modulation rate of DS phase-modulators and intensity modulator only support 10 gigabits/
Second, therefore the attainable downlink and uplink peak transfer rate of the present embodiment is also 10 gigabit/secs.But in specific practical operation
The electrooptic modulator of higher rate, therefore the peak transfer rate not limited to this in structure of the present invention application can be used.
For other any signal patterns, as long as meeting that modulation and demodulation between the two are independent of each other, using identical
Device, as long as somewhat changing end module is received, can all meet the transmission of the spacing wave of the wavelength-division multiplex full duplex of high-speed.
By above-mentioned implementation as it can be seen that the technology of the present invention significant effect, available for two-way laser space communication, single channel it is two-way
Transmission rate is high, and transmission rate is multiplied after wavelength-division multiplex, realizes the space communication of high speed full duplex truly.
Claims (5)
1. a kind of non-interfering full duplex space high speed communication apparatus of dicode type based on modulator, including base station and terminal,
It is characterized in that：The base station includes the first continuous wave laser (1), the second continuous wave laser (2), the 3rd continuous wave laser
(3), the n-th continuous wave laser (N), the first Polarization Controller (4), the second Polarization Controller (5), the 3rd Polarization Controller (6),
M Polarization Controllers (M), combiner device (7), the first signal source (8), the first electrooptic modulator (9), the first optical circulator (10),
First space-fiber coupling device (11), the first optical antenna (12), the 3rd optical filter (26), the second optical attenuator (27)
End module (28) is received with second；First continuous wave laser (1), the second continuous wave laser (2), the 3rd continuous wave laser
(3) ..., the laser that the n-th continuous wave laser (N) is sent is respectively through respective first Polarization Controller (4), the second Polarization Controller
(5), the 3rd Polarization Controller (6) ..., the first Electro-optical Modulation is input to by combiner device (7) after m Polarization Controllers (M)
In device (9), the first electrooptic modulator (9) passes through cable connection, the first electrooptic modulator (9) output terminal with the first signal source (8)
The first port of the first optical circulator (10) is connected to, the second port of the first optical circulator (10) is connected to the first space-light
The input terminal of fine coupling device (11), the first space-fiber coupling device (11) and the first optical antenna (12) passes through spatial light
It is of coupled connections, the 3rd port of the first optical circulator (10) is successively by the 3rd optical filter (26), the second optical attenuator (27)
It is connected afterwards with the second reception end module (28)；
The terminal includes the second optical antenna (14), second space-fiber coupling device (15), the second optical circulator
(16), image intensifer (17), the first optical filter (18), photo-coupler (19), the second optical filter (20), the first optical attenuator
(21), first end module (22), the 4th Polarization Controller (23), secondary signal source (24) and the second electrooptic modulator are received
(25)；The output terminal of second optical antenna (14) is connected with second space-fiber coupling device (15) by space optical coupling, the
Two spaces-fiber coupling device (15) are connected to the second port of the second optical circulator (16), and the of the second optical circulator (14)
Three ports are connected to the input terminal of photo-coupler (19), optocoupler after image intensifer (17), the first optical filter (18) successively
One output terminal of clutch (19) is connected to the first receiving terminal through the second optical filter (20), the first optical attenuator after (21) successively
Module (22), another output terminal of photo-coupler (19) are input to the second electrooptic modulator after the 4th Polarization Controller (23)
(25) in, the second electrooptic modulator (25) and secondary signal source (24) by cable connection, the second electrooptic modulator (25) it is defeated
Outlet is connected to the first port of the second optical circulator (16).
A kind of 2. non-interfering full duplex space high-speed communication dress of dicode type based on modulator according to claim 1
Put, it is characterised in that：The base station and terminal is respectively placed in the both sides of space channel (13), and the signal sent from base station passes through
First space-fiber coupling device (11) is coupled into free space optical, is then emitted to space letter from the first optical antenna (12)
Road (13), and arrive the second optical antenna (14) of terminal again after space channel (13) transmission and be received；The letter sent from terminal
Number free space optical is coupled into by second space-fiber coupling device (15), is then emitted to from the second optical antenna (14)
Space channel (13), and arrive the first optical antenna (12) of base station again after space channel (13) transmission and be received.
A kind of 3. non-interfering full duplex space high-speed communication dress of dicode type based on modulator according to claim 1
Put, it is characterised in that：The light that the continuous wave laser of the base station is sent is through Polarization Controller and combiner device (7) wavelength-division multiplex
After be input in the first electrooptic modulator (9), the first electrooptic modulator (9) passes through a kind of pattern in the first signal source (8) loading
Signal forms flashlight, as downlink signal, is then transferred to the first space-fiber coupling device through the first optical circulator (10)
(11) after being coupled into free space optical, space channel (13) is injected to by the first optical antenna (12) forward direction；The of the terminal
It is empty through second after two optical antennas (14) receive the optical signal from the first optical antenna (12) by space channel (13)
M- fiber coupling device (15) coupling is incided in the second optical circulator (16), is filtered successively through image intensifer (17), the first light
Enter photo-coupler (19) after the amplification filtering of device (18), spread out of a part of flashlight from photo-coupler (19) passes through second successively
The algorithm of optical filter (20), the first optical attenuator (21) receives end module (22) by first after handling and receives detection, obtains
Obtain downlink signal data；Spread out of another part flashlight from photo-coupler (19) and modulated through the second electrooptic modulator (25) and add again
The second optical circulator (16) is output to after carrying another pattern signal, as uplink signal, re-modulated signals light is through the second light
Circulator (16) is transferred to second space-fiber coupling device (15) and is coupled back into free light space, finally by the second optical antenna
(14) into space channel (13), the flashlight of retroeflection is received by the first optical antenna (12) of base station successively to be incorporated to for reverse retroeflection
The first space-fiber coupling device (11) is mapped to, then by the first optical circulator (10), the 3rd optical filter (26), the second light
End module (28) is received by second to receive, obtain uplink signal data after attenuator (27).
4. the non-interfering full duplex space of a kind of dicode type based on modulator according to claim 1 or 2 is logical at a high speed
T unit, it is characterised in that：The first reception end module (22) is determined by the first electrooptic modulator (9) modulation type：
If the first electrooptic modulator (9) modulated signal type is phase-coded signal, first, which receives end module (22), includes the
Five Polarization Controllers (29), phase-coded signal demodulator (30) and the first photodetector (31)；Photo-coupler (19) it is defeated
Outlet is successively through the second optical filter (20), the first optical attenuator (21), the 5th Polarization Controller (29), phase-coded signal solution
Device (30) is adjusted to be connected afterwards with the first photodetector (31)；
If the first electrooptic modulator (9) modulated signal type is intensity-coded signals, the first receiving module (22) uses second
Photodetector (32).
5. the non-interfering full duplex space of a kind of dicode type based on modulator according to claim 1 or 2 is logical at a high speed
T unit, it is characterised in that：The second reception end module (28) is determined by the second electrooptic modulator (25) modulation type：
If the second electrooptic modulator (25) modulation type is intensity-coded signals, the second reception end module (28) uses the second light
Electric explorer (32)；
If the second electrooptic modulator (25) modulation type is phase-coded signal, it is inclined that the second reception end module (22) includes the 5th
Shake controller (29), phase-coded signal demodulator (30) and the first photodetector (31)；The output terminal of photo-coupler (19)
Successively through the second optical filter (20), the first optical attenuator (21), the 5th Polarization Controller (29), phase-coded signal demodulator
(30) it is connected afterwards with the first photodetector (31).
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