CN103873151B - The spaceborne integrated communication system of a kind of compatible with microwave, laser and quantum communications - Google Patents
The spaceborne integrated communication system of a kind of compatible with microwave, laser and quantum communications Download PDFInfo
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- CN103873151B CN103873151B CN201410086301.0A CN201410086301A CN103873151B CN 103873151 B CN103873151 B CN 103873151B CN 201410086301 A CN201410086301 A CN 201410086301A CN 103873151 B CN103873151 B CN 103873151B
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Abstract
A kind of compatible with microwave, the spaceborne integrated communication system of laser and quantum communications, comprise optical antenna (1), dichronic mirror (2), quantum communications filter (3), quantum communications collimation coupled lens (4), quantum communications module (5), polarizing beam splitter (6), laser communication collimation lens (7), light amplification module (8), Electro-optical Modulation module (9), the polarizer (10), laser instrument (11), laser communication filter (12), laser communication coupled lens (13), laser pick-off module (14), microwave modulation /demodulation module (15), microwave antenna (16), electricity amplification module (17) and multiplexer (18). this integrated communication system is as satellite load, can realize between star simultaneously and star ground between microwave communication, laser communication and quantum communications, significantly improve integrated level, the effectively complexity of reduction system, there is simple in structure, the advantage such as volume is little, lightweight, low in energy consumption and three kinds of communication system compatibilities, can be widely used in all kinds of spaceborne communications fields such as dual-use.
Description
Technical field
The invention belongs to the communications field, relate to a kind of satellite integrated communication system.
Background technology
Satellite communication is one of major way of modern communications, in civilian, military and space are scientific and technological, has heavilyThe effect of wanting. Traditional On Satellite-earth Microwave Communication resource of frequency range is very nervous, and to satellite communication speedBut require constantly improving, and volume, weight and power consumptions etc. to communication system propose stricterRestriction, in the urgent need to developing the more satellite laser communications technology of high band. Meanwhile, because satellite quantum is logicalLetter has the safe feature that is kept absolutely secret, and becomes the focus of current international research. At present, multiple states in the worldFamily has started to develop satellite laser communications system and satellite quantum communication system, and carries out related satellite communicationExperimental study.
Compared with On Satellite-earth Microwave Communication, satellite laser communications traffic rate, system bulk, weight, power consumption,The aspects such as communication distance have all shown very large advantage, but in star ground communication link, are subject to air motionAnd the impact of weather condition, the availability of star ground laser communication and stability are not as good as microwave communication, therefore commonBe On Satellite-earth Microwave Communication and satellite laser communications use, and both are designed to independently on Seeds of First Post-flight platformSatellite load. Meanwhile, although the essence of satellite quantum communications is laser communications, itself and classical laser are logicalLetter has difference, i.e. the carrier wave of quantum communications is the single photon signals through coding and modulation, and laser communicationCarrier wave be the laser signal through coding and modulation, both are on modulation and the implementation method such as reception and deviceAll different. Therefore, existing satellite laser communication and quantum communication system are also designed to independently satelliteLoad.
Along with the development of communication technology of satellite, adopt satellite laser communications to build space-based broadband communication networkBecome the main development of communication technology of satellite with adopting satellite quantum communications structure space-based wide-area communication networkTrend is taken into account the advantage of On Satellite-earth Microwave Communication simultaneously, and On Satellite-earth Microwave Communication is still star communicates by letter and can not replace completelyThe communication mode in generation. Therefore, to satellite communication system proposed can compatible with microwave communication, laser communication andThe demand of three kinds of communication modes of quantum communications, and how to realize microwave communication, laser communication and quantum communications systemThe integrated unification of the function of unifying becomes the key issue of needing solution badly.
It is logical that publication number is that the Chinese patent of CN102195717A discloses a kind of quantum of compatible with laser communicationCommunication system can carry out star ground laser communication and quantum communications simultaneously; But it is integrated micro communication system not,Now still independent design of microwave telecommunication system and quantum communication system, the integrated level of system is not high, volume,Weight and power consumption are larger. Publication number be the Chinese patent of CN103117803A disclose a kind of satellite-borne microwave withThe integrated system of laser communication link and application process, but in function, fail to realize quantum communications, do not separateCertainly inheritance and the integration of onboard system to quantum communications function; Meanwhile, in its summary of the invention, laser is logicalLetter adopts internal modulation mode, makes the modulation rate of optical signalling and the modulation accuracy of signal seriously limited, noBe beneficial to the high-speed transfer of information; In laser communication link, adopt transmitting-receiving to distribute optical maser wavelength, the complexity of systemSpend high. Therefore, although there are two kinds although above two kinds of technical schemes have all realized a spaceborne communication terminalThe system integration of function, but satellite-borne microwave communication, laser communication and quantum communications three thoroughly do not solvedPlant the defect of communication function and system integration.
Be subject to space to carry the restriction of condition, the integrated and multi-operation mode of Space-borne to communication equipmentDemand constantly increases, and effectively to reduce the requirement to volume, weight and power consumption, and improves the cost performance of systemAnd compatibility, the inheritance of guarantee systemic-function. Therefore, spaceborne communication system is logical to microwave communication, laserThe demand of letter and three kinds of communication functions of quantum communications and system integration is very urgent.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of simple in structure,Volume is little, lightweight, low in energy consumption, and a communication terminal can be realized the spaceborne of three kinds of communication functions simultaneouslyCommunication integrate system, thus satellite-borne microwave communication, three kinds of merits of communicating by letter of laser communication and quantum communications thoroughly solvedThe problem of energy and system integration.
Technical solution of the present invention is: the spaceborne integrated of a kind of compatible with microwave, laser and quantum communications leads toCommunication system, comprise optical antenna, dichronic mirror, quantum communications filter, quantum communications collimation coupled lens,Quantum communications module, polarizing beam splitter, laser communication collimation lens, light amplification module, Electro-optical Modulation module,The polarizer, laser instrument, laser communication filter, laser communication coupled lens, laser pick-off module, microwaveModulation /demodulation module, microwave antenna, electric amplification module and multiplexer, wherein:
When quantum communications: the quantum signal in space enters dichronic mirror after optical antenna receives, and dichronic mirror will be measuredThe light of sub-signal of communication wave band of living in reflexes to quantum communications filter, spuious through the filtering of quantum communications filterAfter light, be coupled into quantum communications module by quantum communications collimation coupled lens, completed amount by quantum communications moduleThe demodulating and decoding of sub-signal of communication; In the time of traffic volume subsignal, send single photon signal by quantum communications module,Single photon signal is incident to dichronic mirror through quantum communications collimation coupled lens, and is reflexed to optics by dichronic mirrorThe backward space radiation of antenna;
When microwave communication: the microwave signal in space receives through microwave antenna, after amplifying via electric amplification module, arriveReach multiplexer and be dispensed to microwave modulation /demodulation module and realize the reception of microwave signal by multiplexer; Micro-when sendingWhen ripple signal, by microwave modulation /demodulation module output microwave signal, be dispensed to electric amplification module via multiplexerAfter amplification, by microwave antenna to space radiation;
When digital laser communication: the digital laser signal in space enters dichronic mirror after optical antenna receives, pointThe light of digital laser signal wave band of living in is transmitted through polarizing beam splitter by look mirror, and reflect via polarizing beam splitterEnter laser communication filter filtering veiling glare, the emergent light of laser communication filter through laser communication coupling thoroughlyMirror is coupled to laser pick-off module and carries out opto-electronic conversion, then delivers to microwave modulation /demodulation module and completes digital sharpThe demodulation of optical signal; In the time sending digital laser signal, laser instrument sends continuous laser carrier wave, and the polarizer willThe polarization state of laser carrier light beam becomes to be delivered to Electro-optical Modulation module after horizontal polarization or vertical polarization and adjustsSystem, the outgoing signal of Electro-optical Modulation module carries out power amplification, laser communication collimation through light amplification module successivelyCollimated and polarizing beam splitter and dichronic mirror transmission laggard enter optical antenna, and by optical antenna to skyBetween radiation;
When RoF laser communication:
1. in the time receiving RoF laser signal, when the demodulation of RoF laser signal is communicated by letter with digital laser pairThe demodulation mode of digital laser signal is identical;
2. in the time of the local RoF laser signal of transmitting, export microwave mode analog signal by microwave modulation /demodulation module,Be dispensed to the driving signal of Electro-optical Modulation module as Electro-optical Modulation module via multiplexer, the polarizer is by laserThe polarization state of carrier wave light beam is incident to Electro-optical Modulation module after becoming horizontal polarization or vertical polarization, in simulationUnder the driving of signal, after electric light intensity modulated, form local RoF laser signal and successively through light amplification module,Laser communication collimation lens, polarizing beam splitter, dichronic mirror, optical antenna are to space radiation;
3. in the time receiving and forward RoF laser signal, the RoF laser signal in space receives through optical antennaAfter enter dichronic mirror, the light of RoF laser signal wave band of living in is transmitted through polarizing beam splitter by dichronic mirror, and warpEnter laser communication filter filtering veiling glare, the emergent light of laser communication filter by polarizing beam splitter reflectionBe coupled to laser pick-off module through laser communication coupled lens and carry out opto-electronic conversion generation analog electrical signal, thenBe dispensed to the driving signal of Electro-optical Modulation module as Electro-optical Modulation module via multiplexer, the polarizer is by laserThe polarization state of carrier wave light beam is incident to Electro-optical Modulation module after becoming horizontal polarization or vertical polarization, in simulationUnder the driving of the signal of telecommunication, after electric light intensity modulated, form and receive also warp successively of identical RoF laser signalLight amplification module, laser communication collimation lens, polarizing beam splitter, dichronic mirror, optical antenna are to space radiation;
4. in the time receiving microwave signal and utilize RoF laser to realize forwarding, the microwave signal in space is through microwave skyLine receives, and after amplifying via electric amplification module, arrive multiplexer and be dispensed to Electro-optical Modulation module by multiplexer,The microwave mode analog signal that utilization receives is as the driving signal of Electro-optical Modulation module, and the polarizer is by laser carrierThe polarization state of light beam is incident to Electro-optical Modulation module after becoming horizontal polarization or vertical polarization, in analog telecommunicationsNumber driving under after electric light intensity modulated, form local RoF laser signal and successively through light amplification module, swashOptic communication collimation lens, polarizing beam splitter, dichronic mirror, optical antenna are to space radiation.
Described Electro-optical Modulation module is lithium niobate mach zhender intensity modulator and driver module. Described is inclined to one sideThe optical splitter that shakes is polarizing cube optical splitter. Described light amplification module is low noise erbium-doped fiber amplifier.The described polarizer is linear polariser, and it plays folk prescription to being horizontal direction or vertical direction. Described laserDevice is distributed feedback type semiconductor laser or optical fiber laser. Described laser pick-off module is PIN photoelectricityDetecting module. Described optical antenna is autocollimator. Described microwave antenna is parabola formula antenna.
The present invention's advantage is compared with prior art:
(1) laser communication and quantum communications are adopted light path shared design, two kinds of communication links by system of the present inventionShare same set of optical transmitting and receiving antenna, have simple in structure, volume is little, lightweight feature;
(2) digital laser communication and RoF laser communication are all adopted external modulation mode by system of the present invention, carriesThe high modulation rate of laser signal and the modulation accuracy of signal, eliminated the Zhou being caused by laser instrument internal modulationThe effect of singing;
(3) digital laser communication and RoF laser communication are shared same set of laser instrument, line by system of the present inventionThe property polarizer, Electro-optical Modulation module, light amplification module, optical emitting and receiving system and microwave modulatedemodulateMode transfer piece, the quantity of fully having reduced system device parts, effectively reduces volume, weight and the complexity of systemDegree;
(4) system of the present invention adopts the same optical maser wavelength of transmit-receive sharing in laser communication link, utilizes linearThe polarization that the polarizer and polarizing beam splitter are realized transmitting-receiving light beam distributes, without laser communication link is carried out to wavelengthDistribute, effectively reduce the complexity of system;
(5) system of the present invention has realized three kinds of communication modes in a terminal, can or carry out separately simultaneouslyMicrowave communication, laser communication and quantum communications, and compatible RoF laser communication mode. This system is not only fineInherited traditional microwave communication technology, and compatible with laser communication and quantum communications new technique, realizeMicrowave communication, laser communication and quantum communication system unitized and integrated, can save huge satelliteResource, reduces satellite cost, and its useful benefit is fairly obvious, can be widely used in dual-use all kinds of starCarry the communications field.
Brief description of the drawings
Fig. 1 is the theory of constitution block diagram of integrated communication system of the present invention.
Detailed description of the invention
As shown in Figure 1, the spaceborne integrated communication system of the present invention mainly comprise optical antenna 1, dichronic mirror 2,Quantum communications filter 3, quantum communications collimation coupled lens 4, quantum communications module 5, polarizing beam splitter 6,Laser communication collimation lens 7, light amplification module 8, Electro-optical Modulation module 9, the polarizer 10, laser instrument 11,Laser communication filter 12, laser communication coupled lens 13, laser pick-off module 14, microwave modulation /demodulationModule 15, microwave antenna 16, electric amplification module 17 and multiplexer 18.
Dichronic mirror 2, quantum communications filter 3, quantum communications collimation coupled lens 4, quantum communications module 5,Polarizing beam splitter 6, laser communication collimation lens 7, light amplification module 8, Electro-optical Modulation module 9, the polarizer10, laser instrument 11, laser communication filter 12, laser communication coupled lens 13, laser pick-off module 14Be positioned in the light path after optical antenna 1. Microwave modulation /demodulation module 15, electric amplification module 17 and multiplexerOn 18 circuit that are positioned at after microwave antenna 16.
Laser instrument 11 is connected with the polarizer 10 by laser signal light path, the polarizer 10, electric light in light pathModulation module 9, light amplification module 8, laser communication collimation lens 7 are arranged successively. Laser communication collimation thoroughlyIn the rear light path of mirror 7, place polarizing beam splitter 6. On the one hand, polarizing beam splitter 6 is by laser signal light pathLight is sent into laser communication filter 12, laser communication coupled lens 13 and laser pick-off module 14 successively. SeparatelyOn the one hand, polarizing beam splitter 6 is sent the light of laser signal light path into dichronic mirror 2 and optical antenna 1 successively.Meanwhile, dichronic mirror 2 is also delivered to quantum communications filter 3, quantum successively by the light of quantum signal light pathCommunication collimation coupled lens 4 and quantum communications module 5. Laser pick-off module 14 by microwave signal simultaneously withMicrowave modulation /demodulation module 15 is connected with multiplexer 18, and the output of microwave modulation /demodulation module 15 is also delivered toMultiplexer 18. Multiplexer 18 by microwave signal respectively with electric amplification module 17 and Electro-optical Modulation module 9Be connected. Microwave antenna 16 is delivered in the output of electricity amplification module 17.
Quantum communications module 5 is for carrying out the module of quantum communications single photon emission and receiving demodulation decoding, whereinSingle-photon laser wavelength is 800nm wave band. Specifically can adopt the quantum random number of idQuantique companyThe realization such as generator and single-photon detector.
Polarizing beam splitter 6 can be selected polarizing cube optical splitter. It to the light transmittance of horizontal polarization light is90%, be 90% to the reflectivity of orthogonal polarized light. Specifically can adopt the PBS-15 of SIGMAKOKI companyThe polarisation cube beamsplitter of type.
Dichronic mirror 2 can be selected the laser of 1550nm wave band is carried out to transmission, simultaneously to 800nm wave bandQuantum communications single photon reflect. Specifically can adopt SIGMAKOKI company DPB-30 type etc.Limit dispersing prism.
Light amplification module 8, can as the shared light amplification module of digital laser communication and RoF laser communicationSelect low noise erbium-doped fiber amplifier (EDFA), as the low noise image intensifer of alnair company, its noiseCoefficient < 5dB, gains as 25dB.
Electro-optical Modulation module 9 is as the shared Electro-optical Modulation module of digital laser communication and RoF laser communication,Can select lithium niobate mach zhender (MZM) intensity modulator and driver module, realize digital laser logicalThe intensity modulated that the intensity modulated of letter is communicated by letter with simulated laser. Specifically can select the 40Gb/s electricity of EOspaceThe 40Gb/s drive amplification module of optical modulator and Centellax company realizes.
The polarizer 10 is linear polariser, and it plays folk prescription to being horizontal direction or vertical direction. Require oneIn cover satellite communication system, the orthogonal thereto placement of linear polariser in two emission systems. As transmitting terminal adoptsHorizontal direction polarization is placed, the polarizer of the other side's receiving terminal polarization placement in vertical direction; Vice versa.
Laser instrument 11 is the DFB(distributed feedback of 1550nm wave band) semiconductor laser or optical-fiber laserDevice, as the common light source of digital laser communication and RoF laser communication. Specifically can select Teraxion company1550nm wave band Distributed Feedback Laser.
Laser pick-off module 14 is PIN photodetection module. Specifically can select the height of Discovery companySensitivity PIN detector.
Modulation and demodulation module that microwave modulation /demodulation module 15 is microwave signal.
Optical antenna 1 can be selected autocollimator, is generally Cassegrain telescope.
Microwave antenna 16 is designed to parabola formula antenna.
In this integrated system, microwave communication mode of operation is as follows: in the time that system receives microwave signal, by whole at a distanceThe microwave signal that end sends, after microwave antenna 16 receives, is amplified via electric amplification module 17, then arrivesMultiplexer 18 is also dispensed to microwave modulation /demodulation module 15 by multiplexer 18, realizes the reception of microwave signal.In the time that system sends microwave signal, export microwave signal by microwave modulation /demodulation module 15, this signal is firstReach multiplexer 18, be dispensed to transmitting channel by multiplexer 18, after electric amplification module 17 amplifies, byMicrowave antenna 16 is launched.
In this integrated system, quantum communications mode of operation is as follows: in the time of system quantities received subsignal, by whole at a distanceThe quantum signal that end sends is after optical antenna 1 receives, and the rear end light path that enters optical antenna 1, in rear endIn light path, first enter dichronic mirror 2, dichronic mirror 2 reflects quantum communications signal wave band of living in, entersQuantum communications filter 3, after quantum communications filter 3 filtering veiling glares, by the coupling of quantum communications collimationLens 4 are coupled into quantum communications module 5, complete the demodulation to quantum communications signal by quantum communications module 5Decode procedure. In the time of system emission measure subsignal, send single photon signal by quantum communications module 5, processQuantum communications collimation coupled lens 4 is incident to dichronic mirror 2, is reflexed to optical antenna 1 by dichronic mirror 2, byOptical antenna 1 is launched, and is received by receiving terminal at a distance.
In this integrated system, laser communication mode of operation is as follows: in the time that system receives digital laser signal, by farLocate the digital laser signal of terminal transmission after optical antenna 1 receives, the rear end light path that enters optical antenna 1,In the light path of rear end, first enter dichronic mirror 2, dichronic mirror 2 carries out transmission to laser communication signal wave band of living inRear arrival polarizing beam splitter 6, then, after polarizing beam splitter 6 reflections, enters laser communication filter 12Filtering veiling glare, and after be coupled to laser pick-off module 14 through laser communication coupled lens 13, connect through laserReceive after module 14 opto-electronic conversion, enter microwave modulation /demodulation module 15, complete the demodulation of laser communication signalProcess. In the time of system transmitting digital laser signal, send continuous laser carrier wave by laser instrument 11, pass through partiallyThe polarization state of the rear laser carrier light beam of device 10 becomes horizontal polarization (or vertical polarization), enters to inject Electro-optical ModulationModule 9, is completed entering light amplification module 8 after the modulation of laser signal and carry out power by Electro-optical Modulation module 9Amplify, enter polarizing beam splitter 6 after being then incident to laser communication collimation lens 7 collimation, after this warp successivelyPolarizing beam splitter 6, dichronic mirror 2 transmissions laggard enter optical antenna 1, and launched by optical antenna 1.
This integrated system is in the time of laser communication mode of operation, and transmitting-receiving light path shares process and is: when transmitting terminalThe polarizer 10 is the horizontal direction polarizer, and the polarizer 10 of receiving terminal should be selected the vertical direction polarizer, withThe polarization state that ensures transmitting-receiving two-end optical signal is orthogonal; Vice versa.
Above three kinds of mode of operations are that this integrated communication system carries out microwave communication, quantum communications individually or simultaneouslyThe course of work with laser communication. In addition, this integrated system also can be realized RoF(light-carried wireless electricity) laserThis locality transmitting, forwarding and the receiving function of signal of communication.
In this integrated system, RoF laser communication mode of operation is as follows:
1. in the time that system receives RoF laser signal, the RoF laser signal sending is at a distance by optical antenna 1After reception, enter dichronic mirror 2, dichronic mirror 2 carries out transmission to laser communication signal wave band of living in, enters partiallyThe optical splitter 6 that shakes, through polarizing beam splitter, 6 reflections enter laser communication filter 12 filtering veiling glares, thenBe coupled into laser pick-off module 14 through laser communication coupled lens 13 and carry out opto-electronic conversion, obtain the signal of telecommunication and enterEnter microwave modulation /demodulation module 15 and carry out the demodulation of signal.
2. in the time that system is launched local RoF laser signal, send microwave mode by microwave modulation /demodulation module 15Analog signal, enters multiplexer 18, is dispensed to Electro-optical Modulation module 9 through multiplexer 18, and this analog signal is doneFor the driving signal of Electro-optical Modulation module 9; Meanwhile, send laser carrier by laser instrument 11, through the polarizerAfter 10, be incident to Electro-optical Modulation module 9, after electric light intensity modulated, be incident to light amplification module 8 and carry out meritRate is amplified, and enters polarizing beam splitter 6 after being then incident to laser communication collimation lens 7, after this successively through partiallyShake optical splitter 6, dichronic mirror 2 transmissions laggard enter optical antenna 1, and launched by optical antenna 1.
3. in the time that system receives and forward RoF laser signal, the RoF laser signal sending is at a distance by opticsAfter antenna 1 receives, enter dichronic mirror 2, dichronic mirror 2 carries out transmission to laser communication signal wave band of living in,Be incident to polarizing beam splitter 6, enter 12 filterings of laser communication filter via polarizing beam splitter 6 reflection spuiousLight, and after be coupled into laser pick-off module 14 through laser communication coupled lens 13, the mould after opto-electronic conversionIntend the signal of telecommunication and enter multiplexer 18, be dispensed to Electro-optical Modulation module 9 by multiplexer 18, this analog electrical signalAs the driving signal of Electro-optical Modulation module 9; Meanwhile, send laser carrier by laser instrument 11, through the polarizerAfter 10, be incident to Electro-optical Modulation module 9, under the driving of analog electrical signal, after electric light intensity modulated, be incident toLight amplification module 8 is carried out power amplification, enters polarization spectro after being then incident to laser communication collimation lens 7Device 6, after this successively through polarizing beam splitter 6, dichronic mirror 2 transmissions laggard enter optical antenna 1, and by optics skyLine 1 is launched.
4. in the time that system receives microwave signal and utilize RoF laser to realize forwarding, what sent by distant place terminal is micro-Ripple signal, after microwave antenna 16 receives, amplifies via electric amplification module 17, then arrives multiplexer 18,Be dispensed to Electro-optical Modulation module 9 by multiplexer 18, microwave signal is as the driving signal of Electro-optical Modulation module 9;Meanwhile, send laser carrier by laser instrument 11, after the polarizer 10, be incident to Electro-optical Modulation module 9,Under the driving of microwave signal, after electric light intensity modulated, be incident to light amplification module 8 and carry out power amplification, thenAfter being incident to laser communication collimation lens 7, enter polarizing beam splitter 6, after this successively through polarizing beam splitter 6,Dichronic mirror 2 transmissions laggard enter optical antenna 1, and launched by optical antenna 1, complete microwave signalThe forwarding of reception and RoF laser signal.
The content not being described in detail in description of the present invention belongs to those skilled in the art's known technology.
Claims (9)
1. a spaceborne integrated communication system for compatible with microwave, laser and quantum communications, is characterized in that: bagDraw together optical antenna (1), dichronic mirror (2), quantum communications filter (3), quantum communications collimation coupled lens(4), quantum communications module (5), polarizing beam splitter (6), laser communication collimation lens (7), light amplificationModule (8), Electro-optical Modulation module (9), the polarizer (10), laser instrument (11), laser communication filter(12), laser communication coupled lens (13), laser pick-off module (14), microwave modulation /demodulation module (15),Microwave antenna (16), electric amplification module (17) and multiplexer (18), wherein:
When quantum communications: the quantum signal in space enters dichronic mirror (2) after optical antenna (1) receives,The light of quantum communications signal wave band of living in is reflexed to quantum communications filter (3) by dichronic mirror (2), through amountAfter son communication filter (3) filtering veiling glare, be coupled into quantum by quantum communications collimation coupled lens (4) logicalLetter module (5), completes the demodulating and decoding to quantum communications signal by quantum communications module (5); Work as transmissionWhen quantum signal, send single photon signal by quantum communications module (5), single photon signal is through quantum communicationsCollimation coupled lens (4) is incident to dichronic mirror (2), and is reflexed to optical antenna (1) by dichronic mirror (2)Backward space radiation;
When microwave communication: the microwave signal in space receives through microwave antenna (16), via electric amplification module (17)After amplifying, arrive multiplexer (18) and be dispensed to microwave modulation /demodulation module (15) by multiplexer (18) realThe reception of existing microwave signal; In the time sending microwave signal, by microwave modulation /demodulation module (15) output microwaveSignal, is dispensed to after electric amplification module (17) amplification, by microwave antenna (16) via multiplexer (18)To space radiation;
When digital laser communication: the digital laser signal in space enters dichronic mirror after optical antenna (1) receives(2), the light of digital laser signal wave band of living in is transmitted through polarizing beam splitter (6) by dichronic mirror (2), andEnter laser communication filter (12) filtering veiling glare, laser communication via polarizing beam splitter (6) reflectionThe emergent light of filter (12) is coupled to laser pick-off module (14) through laser communication coupled lens (13)Carry out opto-electronic conversion, then deliver to microwave modulation /demodulation module (15) and complete the demodulation of digital laser signal;In the time sending digital laser signal, laser instrument (11) sends continuous laser carrier wave, and the polarizer (10) will swashThe polarization state of light carrier light beam becomes to be delivered to Electro-optical Modulation module (9) after horizontal polarization or vertical polarization and carries outModulation, the outgoing signal of Electro-optical Modulation module (9) successively through light amplification module (8) carry out power amplification,Laser communication collimation lens (7) collimation and polarizing beam splitter (6) and dichronic mirror (2) transmission are laggardEnter optical antenna (1), and by optical antenna (1) to space radiation;
When RoF laser communication:
1. in the time receiving RoF laser signal, when the demodulation of RoF laser signal is communicated by letter with digital laser pairThe demodulation mode of digital laser signal is identical;
2. in the time of the local RoF laser signal of transmitting, by the simulation of microwave modulation /demodulation module (15) output microwaveSignal, is dispensed to Electro-optical Modulation module (9) as Electro-optical Modulation module (9) via multiplexer (18)Drive signal, the polarization state of laser carrier light beam is become horizontal polarization or vertical polarization by the polarizer (10)After be incident to Electro-optical Modulation module (9), under the driving of analog signal, after electric light intensity modulated, form localRoF laser signal is also successively through light amplification module (8), laser communication collimation lens (7), polarizing beam splitter(6), dichronic mirror (2), optical antenna (1) are to space radiation;
3. in the time receiving and forward RoF laser signal, the RoF laser signal in space is through optical antenna (1)After reception, enter dichronic mirror (2), dichronic mirror (2) is transmitted through the light of RoF laser signal wave band of living in partiallyThe optical splitter (6) that shakes, and enter laser communication filter (12) filtering via polarizing beam splitter (6) reflectionVeiling glare, the emergent light of laser communication filter (12) is coupled to sharp through laser communication coupled lens (13)Optical Receivers (14) carries out opto-electronic conversion and generates analog electrical signal, then distributes via multiplexer (18)To the driving signal of Electro-optical Modulation module (9) as Electro-optical Modulation module (9), the polarizer (10) will swashThe polarization state of light carrier light beam is incident to Electro-optical Modulation module (9) after becoming horizontal polarization or vertical polarization,Under the driving of analog electrical signal, after electric light intensity modulated, form and receive identical RoF laser signal alsoSuccessively through light amplification module (8), laser communication collimation lens (7), polarizing beam splitter (6), dichronic mirror (2),Optical antenna (1) is to space radiation;
4. in the time receiving microwave signal and utilize RoF laser to realize forwarding, the microwave signal in space is through microwave skyLine (16) receives, via arrival multiplexer (18) after electric amplification module (17) amplification and by multiplexer (18)Be dispensed to Electro-optical Modulation module (9), utilize the microwave signal that receives as Electro-optical Modulation module (9)Drive signal, the polarization state of laser carrier light beam is become horizontal polarization or vertical polarization by the polarizer (10)After be incident to Electro-optical Modulation module (9), under the driving of microwave signal, after electric light intensity modulated, form localRoF laser signal is also successively through light amplification module (8), laser communication collimation lens (7), polarizing beam splitter(6), dichronic mirror (2), optical antenna (1) are to space radiation.
2. a kind of compatible with microwave according to claim 1, laser and quantum communications is spaceborne integrated logicalCommunication system, is characterized in that: described Electro-optical Modulation module (9) is lithium niobate mach zhender intensity modulatedDevice and driver module.
3. a kind of compatible with microwave according to claim 1, laser and quantum communications is spaceborne integrated logicalCommunication system, is characterized in that: described polarizing beam splitter (6) is polarizing cube optical splitter.
4. a kind of compatible with microwave according to claim 1, laser and quantum communications is spaceborne integrated logicalCommunication system, is characterized in that: described light amplification module (8) is low noise erbium-doped fiber amplifier.
5. a kind of compatible with microwave according to claim 1, laser and quantum communications is spaceborne integrated logicalCommunication system, is characterized in that: the described polarizer (10) is linear polariser, and it plays folk prescription to being levelDirection or vertical direction.
6. a kind of compatible with microwave according to claim 1, laser and quantum communications is spaceborne integrated logicalCommunication system, is characterized in that: described laser instrument (11) is distributed feedback type semiconductor laser or optical fiberLaser instrument.
7. a kind of compatible with microwave according to claim 1, laser and quantum communications is spaceborne integrated logicalCommunication system, is characterized in that: described laser pick-off module (14) is PIN photodetection module.
8. a kind of compatible with microwave according to claim 1, laser and quantum communications is spaceborne integrated logicalCommunication system, is characterized in that: described optical antenna (1) is autocollimator.
9. a kind of compatible with microwave according to claim 1, laser and quantum communications is spaceborne integrated logicalCommunication system, is characterized in that: described microwave antenna (16) is parabola formula antenna.
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