CN103234515B - A kind of analogy method of space laser interference system low light level phaselock technique and device - Google Patents
A kind of analogy method of space laser interference system low light level phaselock technique and device Download PDFInfo
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Abstract
The invention provides a kind of analogy method and device of space laser interference system low light level phaselock technique, method comprises the steps: that (a) produces the controlled polarized incident laser of collimation, monochrome, polarization state, intensity and phase place and polarization this locality laser; B (), by echo signal analog control system, modulates the phase place of described incident laser, be used for simulated target signal; C (), by differential interferometry system, decaying to the intensity of incident laser and described incident laser and described local laser being converged forms two-pass DINSAR and interferes laser signal; D (), by phase-locked control system, modulates the phase place of described local laser, make the phase place of phase place to incident laser of described local laser follow the tracks of and lock.This analogy method and device accurately can carry out the ground simulating of laser interference range finding low light level phaselock technique between star.
Description
Technical field
The present invention relates to a kind of analogy method and device of space laser interference system low light level phaselock technique, particularly relate to a kind of analogy method and the device that can be used for space double star laser heterodyne interference range measurement system low light level phaselock technique, in order to carry out ground simulating.
Background technology
The a series of space exploration project of the positive program launched of current China and European and American areas, such as lunar gravimetry field explorer satellite of future generation plan, the earth advanced Gravity Satellite plan and the survey plan of spatial attraction ripple etc.The accurate measurement of space double star spacing is extremely important to space exploration project.Because laser interference range finding can exceed three to four magnitudes than tellurometer survey in measuring accuracy, various countries all to plan to adopt in this intermediate item between star laser interference ranging technology as the basic methodology of acquisition of signal on the basis optimizing contrast.In addition, there is relative velocity owing to measuring between double star, between star, laser generation Doppler frequency moves, and therefore between star, laser interference range finding must adopt heterodyne interferometry.But laser has very large dispersing through long range propagation, and telescopical reception diameter is limited, and this just causes the decay of received optical power.Received optical power Pr can be expressed as:
P: laser initial power; D: telescope diameter; λ: optical maser wavelength; L: interstellar distance.
For the advanced gravimetry of the earth, double star spacing is about 100km, according to Receiver aperture 1cm, laser power 100mW, far-end satellite reception to one-way attenuation after luminous power be about 10nW magnitude; For in the detection of spatial attraction ripple, measuring double star spacing is gigameter magnitude, and telescope Receiver aperture is about 40cm, and laser power is 1W, far-end satellite reception to one-way attenuation after luminous power be about 100pW magnitude.
Laser is after the transmission of long-distance, and power declines to a great extent, if be directly reflected back former spacecraft without special processing, light signal can be very faint, cannot ensure effective acquisition of signal.The phase-locked technology of optics can be utilized at present by representing the low light level of long-range incidence and local high light two laser phase-lockeds (optical phaselocking) respectively, by incident laser PGC demodulation to local laser (making local laser have the phase place identical with incident laser).Thus, local laser, just with the information identical with incident laser, just can replace incident laser to return former spacecraft with local laser.Effectively improve signal intensity and signal to noise ratio (S/N ratio), make overlength distance, high-precision effective measurement becomes possibility.LISA or Grace-Follow-on etc. all adopt space double star laser low light level phaselock technique.
Rational methodology and technical support is provided in order to give space exploration in the future, be necessary the analogy method and the device that design a kind of space laser interference system low light level phaselock technique, particularly relate to a kind of analogy method and the device that can be used for space double star laser heterodyne interference range measurement system low light level phaselock technique, in order to carry out ground simulating.
Summary of the invention
The technical matters that the present invention solves is exactly provide a kind of analogy method of space laser interference system low light level phaselock technique, for accurately carrying out the ground simulating of laser interference range finding between star.
Another technical matters that the present invention solves is exactly provide a kind of analogue means of space laser interference system low light level phaselock technique, can realize the ground simulating of laser interference range finding between star.
In order to solve the problem, the invention provides a kind of analogy method of space laser interference system low light level phaselock technique, comprising the steps:
A () produces the controlled polarized incident laser of collimation, monochrome, polarization state, intensity and phase place and polarization this locality laser;
B (), by echo signal analog control system, modulates the phase place of described incident laser, be used for simulated target signal;
C (), by differential interferometry system, decaying to the intensity of incident laser and described incident laser and described local laser being converged forms two-pass DINSAR and interferes laser signal;
D (), by phase-locked control system, modulates the phase place of described local laser, realize the phase place of described local laser to the tracking of incident laser phase place and locking.
Further, described step (a) specifically comprises the steps:
1) open 1064nm laser instrument, open frequency regulator and acousto-optic frequency shifters power supply after the preheated one-section time, laser instrument exports 90 degree of linearly polarized lights;
2) through the first half-reflecting half mirror, laser is divided into two-way, and light intensity reduces by half;
3) two-way laser is separately respectively through an acousto-optic frequency shifters, wedge, 90 degree of polaroids, the frequency difference 1MHz needed for two-way laser produces, and corrects the laser direction deflection because acousto-optic frequency shifters causes through wedged plate;
4) two-way laser enters electro-optic phase modulator separately respectively; Two-way laser is respective through faraday isolator again, prevents laser return laser light device, affects laser instrument and normally work, and two ways of optical signals is respectively as incident laser and local laser;
Described step (b) specifically comprises the steps:
5) the first computing machine controls the first program-controlled voltage source and regulates and controls the first electro-optic phase modulator, carrys out the double star spacing change that simulated target signal causes, i.e. phase offset;
Described step (c) specifically comprises the steps:
6) incident laser is after the second corner cube mirror, to be decayed light intensity, then arrive the second half-reflecting half mirror by attenuator;
7) local laser is after the 3rd corner cube mirror, arrives the second half-reflecting half mirror;
8) after the second half-reflecting half mirror, differential interferometry laser signal is formed;
9) difference light signal is converted into electric signal by photodetector;
10) phase error of high accuracy number phasometer accurately detecting two-way interference signal;
Described step (d) specifically comprises the steps:
11) second computer utilizes this phase error signal, by Adaptive PID Control method FEEDBACK CONTROL second program-controlled voltage source optimized, carry out the automatically controlled phase modulation of the second electro-optic phase modulator, make the phase place of the phase place of local laser to incident laser follow the tracks of and lock.
Further, described step (a) specifically comprises the steps::
1) open 1064nm laser instrument, after the preheated one-section time, open frequency regulator and acousto-optic frequency shifters power supply.Laser instrument exports 45 degree of linearly polarized lights;
2) laser is through the first faraday isolator, and prevent laser return laser light device, affect laser instrument and normally work, through the first half-reflecting half mirror, laser is divided into two-way, and light intensity reduces by half, and two ways of optical signals is respectively as incident laser and local laser;
3) two-way laser is separately respectively through acousto-optic frequency shifters, wedge, a corner cube mirror, 90 degree of polaroids, and two-way laser produces frequency difference 1MHz, and corrects the laser direction deflection because acousto-optic frequency shifters causes through wedged plate; Two-way laser enters electro-optic phase modulator separately respectively;
Described step (b) specifically comprises the steps:
4) the first computing machine controls the first program-controlled voltage source and regulates and controls the first electro-optic phase modulator, carrys out the double star spacing change that simulated target signal causes, i.e. phase offset;
Described step (c) specifically comprises the steps:
5) incident laser, to be decayed light intensity by attenuator, then arrives the second half-reflecting half mirror;
6) local laser arrives the second half-reflecting half mirror;
7) after the second half-reflecting half mirror, differential interferometry laser signal is formed;
8) difference light signal is converted into electric signal by photodetector;
9) phase error of high accuracy number phasometer accurately detecting two-way interference signal;
Described step (d) specifically comprises the steps:
10) second computer utilizes this phase error signal, by Adaptive PID Control method FEEDBACK CONTROL second program-controlled voltage source optimized, carry out the automatically controlled phase modulation of the second electro-optic phase modulator, make the phase place of the phase place of local laser to incident laser follow the tracks of and lock.
An analogue means for space laser interference system low light level phaselock technique, at least comprises:
One incident laser arm, for generation of the polarized incident laser that collimation, monochrome, polarization state, intensity and phase place are controlled;
One echo signal analog control system, is connected with described incident laser arm, for modulating the phase place of described incident laser;
One local laser arm, for generation of the local laser of the polarization that collimation, monochrome, polarization state, intensity and phase place are controlled;
One differential interferometry system, be connected with described incident laser arm and described local laser arm, form two-pass DINSAR interfere laser signal for decaying to the intensity of described incident laser and incident laser and the described local laser after decay being converged, accurately detecting is carried out to the phase error of two-pass DINSAR interference laser signal;
One phase-locked control system, carries out analyzing and processing to the phase error detected, and modulates the phase place of described local laser, makes the phase place of described local laser to incident laser Phase Tracking and locking.
Further, described incident laser arm comprises and setting gradually along optical axis direction:
A 1064nm laser instrument is 1064nm90 degree linearly polarized laser for generation of wavelength;
First half-reflecting half mirror, be divided into two-way after making laser incidence, light intensity reduces by half;
A first sound optical frequency shifter, makes by the laser of described half-reflecting half mirror transmission through shift frequency later;
First wedged plate, makes to be corrected by the deflection of the laser direction caused after described first sound optical frequency shifter shift frequency;
An one 90 degree of polaroid, calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
First electro-optic phase modulator, for carrying out phase modulation to the laser of process under the control of described echo signal analog control system;
First faraday isolator, for adjusting the laser of process, preventing laser return laser light device, affecting laser instrument and normally work;
First fiber coupler, for being delivered to the second fiber coupler by laser by optical fiber;
Described echo signal analog control system comprises:
First computing machine, for inputting, the True Data of storage space echo signal, be converted to double star spacing data again, be converted to incident laser phase data again, analyze data again, extract feature, Modling model, is converted to echo signal simulation softward, phase control signal is converted to target voltage modulation signal;
First program-controlled voltage source, for receiving the target voltage modulation signal that described computing machine sends, modulates described first electro-optic phase modulator;
Described local laser arm comprises and setting gradually along optical axis direction:
First corner cube mirror, makes to be reflected completely after miter angle incidence by the laser of described first half-reflecting half mirror reflection, and propagates along optical axis direction;
A second sound optical frequency shifter, makes by the laser of described first corner cube mirror reflection through shift frequency later, and the frequency difference needed for producing with the laser through first sound optical frequency shifter;
Second wedged plate, makes to be corrected by the deflection of the laser direction caused after described second sound optical frequency shifter shift frequency;
A 2 90 degree of polaroid, calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
Second electro-optic phase modulator, for carrying out phase modulation to the laser of process under the control of described phase-locked control system, makes phase place identical with incident laser;
Second faraday isolator, for adjusting the laser of process, preventing laser return laser light device, affecting laser instrument and normally work;
3rd fiber coupler, for being delivered to the 4th fiber coupler by laser by optical fiber;
Described differential interferometry system comprises and setting gradually along optical axis direction:
Second fiber coupler, described second fiber coupler is connected with described first fiber coupler by optical fiber;
Second corner cube mirror, makes to reflect completely after miter angle incidence from the laser of described second fiber coupler outgoing;
An attenuator, makes the laser intensity through described second corner cube mirror reflection be decayed;
4th fiber coupler, described 4th fiber coupler is connected with described 3rd fiber coupler by optical fiber;
3rd corner cube mirror, makes to reflect completely after miter angle incidence from the laser of described 4th fiber coupler outgoing;
Second half-reflecting half mirror, makes the laser after described attenuator after 45 degree of incidences, form two-pass DINSAR from two surfaces with the laser after described 3rd corner cube mirror reflects and interferes laser signal;
A photodetector, makes described two-pass DINSAR interfere laser signal to be converted into electric signal;
A high accuracy number phasometer, carries out accurately detecting for interfering the phase error of laser signal to the described two-pass DINSAR comprised in the described electric signal imported into from described photodetector;
Described phase-locked control system comprises:
A second computer, for gather, store described high accuracy number phasometer survey the real-time phase data of differential interferometry laser signal, generate phase control signal by pid control algorithm, then be converted to local voltage modulation signal;
Second program-controlled voltage source, for receiving the described local voltage modulation signal that described computing machine sends, described second electro-optic phase modulator is modulated, the phase place of the phase place of local laser to incident laser is made to follow the tracks of and lock, realize, to Phase Tracking locking in incident laser, namely realizing the phase-locked of two paths of signals.
Further, described incident laser arm comprises and setting gradually along optical axis direction:
A 1064nm laser instrument is 1064nm45 degree linearly polarized laser for generation of wavelength;
First faraday isolator, incident polarization direction is 45 degree, and outgoing polarization direction is 90 degree, calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
First half-reflecting half mirror, be divided into two-way after making laser incidence, light intensity reduces by half, and two ways of optical signals is respectively as incident laser and local laser;
A first sound optical frequency shifter, makes the laser that reflected by described half-reflecting half mirror through shift frequency later;
First wedged plate, makes to be corrected by the deflection of the laser direction caused after described first sound optical frequency shifter shift frequency;
First corner cube mirror, makes laser through described first wedged plate by 90 degree of reflections;
An one 90 degree of polaroid calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
First electro-optic phase modulator, for carrying out phase modulation to the laser of process under the control of described echo signal analog control system;
Described echo signal analog control system comprises:
First computing machine, for inputting, the True Data of storage space echo signal, be converted to double star spacing data again, be converted to incident laser phase data again, analyze data again, extract feature, Modling model, is converted to echo signal simulation softward, phase control signal is converted to target voltage modulation signal;
First program-controlled voltage source, for receiving the target voltage modulation signal that described computing machine sends, modulates described first electro-optic phase modulator;
Described local laser arm comprises and setting gradually along optical axis direction:
A second sound optical frequency shifter, makes by the laser of described first half-reflecting half mirror transmission through shift frequency later, and the frequency difference needed for producing with the laser through first sound optical frequency shifter;
Second wedged plate, makes to be corrected by the deflection of the laser direction caused after described second sound optical frequency shifter shift frequency;
Second corner cube mirror, makes laser through described second wedged plate by 90 degree of reflections;
A 2 90 degree of polaroid, calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
Second electro-optic phase modulator, for carrying out phase modulation to the laser of process under the control of described phase-locked control system, makes phase place identical with incident laser;
Described differential interferometry system comprises and setting gradually along optical axis direction:
An attenuator, makes the laser intensity through described first electro-optic phase modulator be decayed;
Second half-reflecting half mirror, makes the laser after described attenuator and after 45 degree of incidences, forms two-pass DINSAR from two surfaces through the laser of described second electro-optic phase modulator to interfere laser signal;
A photodetector, makes described two-pass DINSAR interfere laser signal to be converted into electric signal;
A high accuracy number phasometer, carries out accurately detecting for interfering the phase error of laser signal to the described two-pass DINSAR comprised in the described electric signal imported into from described photodetector;
Described phase-locked control system comprises:
A second computer, for gather, store described high accuracy number phasometer survey the real-time phase data of differential interferometry laser signal, generate phase control signal by pid control algorithm, then be converted to local voltage modulation signal;
Second program-controlled voltage source, for receiving the described local voltage modulation signal that described computing machine sends, described second electro-optic phase modulator is modulated, the phase place of the phase place of local laser to incident laser is made to follow the tracks of and lock, realize, to Phase Tracking locking in incident laser, namely realizing the phase-locked of two paths of signals.
Advantage of the present invention is:
1) object that the space such as LISA or Grace-Follow-on double star laser phase-locked controls is not used to the phase place locking two-laser, but the incident laser phase information comprising echo signal is locked onto local laser.LISA or Grace-Follow-on proposes high requirement to laser instrument: 10Hz/@1mHz.In the ground experiment stage, be difficult to the laser instrument obtaining precision like this, and the essence of laser phase-locked technology locks echo signals such as gravitational wave or gravity distortion, so when carrying out laser phase-locked technology ground simulating, adopt single laser instrument two acousto-optic frequency shifters (AOM) to carry out frequency modulation and produce two-way laser, be used for simulating two-way laser instrument, the requirement to laser instrument can be reduced so greatly, and overcome laser instrument at the effect of phase noise lower than 0.1Hz frequency range.
2) by the control software design programming Control program-controlled voltage source in PC, and then realize electro-optic phase modulator (EOM) high precision of laser phase is modulated, can be used for the change of virtual space laser satellite interfeerometry ranging culminant star spacing, and corresponding noise signal can be introduced according to actual conditions, the star spacing change under more real space environmental simulation.Simultaneously again by phase-locked control loop fine adjustment electro-optic phase modulator (EOM), the high precision realizing incident laser and local laser is phase-locked.
3) complicacy of external environment condition controls to bring very large difficulty to laser phase-locked.This is tested phase-locked controller and adopts the Adaptive PID Control optimized, throttle signal band noise, and control EOM realizes Phase Tracking and locking fast.
Accompanying drawing explanation
Fig. 1 is the analogue means figure of a kind of space laser interference system low light level phaselock technique of the present invention.
Fig. 2 is echo signal simulation system process flow diagram of the present invention.
Fig. 3 is phase-locked control system process flow diagram of the present invention.
Fig. 4 is the analogue means figure of another kind of space laser interference system low light level phaselock technique of the present invention.
Drawing indicates:
Laser instrument 1 first half-reflecting half mirror 21 second half-reflecting half mirror 22
First corner cube mirror 31 second corner cube mirror 32 first sound optical frequency shifter 41
Second sound optical frequency shifter 42 first wedged plate 51 second wedged plate 52
One 90 degree of polaroid 61 the 2 90 degree of polaroid 62 first program-controlled voltage source 181
First electro-optic phase modulator 8 second electro-optic phase modulator 9 first faraday isolator 101
Second faraday isolator 102 first fiber coupler 111 second fiber coupler 112
3rd fiber coupler 121 the 4th fiber coupler 122 photodetector 14
High accuracy number phasometer 15 second program-controlled voltage source 182 first computing machine 191
Second computer 191 the 3rd corner cube mirror 33
Embodiment
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
The invention provides the analogue means of a kind of space laser interference system low light level phaselock technique as shown in Figure 1.
Comprise an incident laser arm, for generation of the polarized incident laser that collimation, monochrome, polarization state, intensity and phase place are controlled.
Further, incident laser arm comprises and setting gradually along optical axis direction:
A 1064nm laser instrument 1 is 1064nm90 degree linearly polarized laser for generation of wavelength; First half-reflecting half mirror 21, be divided into two-way after making laser incidence, light intensity reduces by half; A first sound optical frequency shifter 41, makes by the laser of half-reflecting half mirror 21 transmission through shift frequency later; First wedged plate 51, makes to be corrected by the deflection of the laser direction caused after first sound optical frequency shifter 41 shift frequency; An one 90 degree of polaroid 61, calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard; First electro-optic phase modulator 8, for carrying out phase modulation to the laser of process under the control of echo signal analog control system; First faraday isolator 101, for adjusting the laser of process, preventing laser return laser light device, affecting laser instrument and normally work; First fiber coupler 111, for being delivered to the second fiber coupler 112 by laser by optical fiber.
Also comprise an echo signal analog control system, be connected with incident laser arm, for modulating the phase place of incident laser.
Further, echo signal analog control system comprises:
First computing machine 191, for inputting, the True Data of storage space echo signal, be converted to double star spacing data again, be converted to incident laser phase data again, analyze data again, extract feature, Modling model, is converted to echo signal simulation softward, phase control signal is converted to target voltage modulation signal; First program-controlled voltage source 181, for receiving the target voltage modulation signal that the first computing machine 191 sends, modulates the first electro-optic phase modulator 8.Echo signal analog control system flow process is see Fig. 2.
Also comprise a local laser arm, for generation of the local laser of the polarization that collimation, monochrome, polarization state, intensity and phase place are controlled.
Further, local laser arm comprises and setting gradually along optical axis direction:
First corner cube mirror 31, makes the laser by the first half-reflecting half mirror 21 reflects reflect completely after miter angle incidence, and propagates along optical axis direction; A second sound optical frequency shifter 42, makes the laser that reflected by the first corner cube mirror 31 through shift frequency later, and the frequency difference needed for producing with the laser through first sound optical frequency shifter 41; Second wedged plate 52, makes to be corrected by the deflection of the laser direction caused after second sound optical frequency shifter 42 shift frequency; A 2 90 degree of polaroid 62, calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard; Second electro-optic phase modulator 9, for carrying out phase modulation to the laser of process under the control of phase-locked control system, makes phase place identical with incident laser; Second faraday isolator 102, for adjusting the laser of process, preventing laser return laser light device, affecting laser instrument and normally work; 3rd fiber coupler 121, for being delivered to the 4th fiber coupler 122 by laser by optical fiber.
Also comprise a differential interferometry system, be connected with incident laser arm and local laser arm, form two-pass DINSAR interfere laser signal for decaying to the intensity of incident laser and incident laser and the local laser after decay being converged, accurately detecting is carried out to the phase error of two-pass DINSAR interference laser signal.
Further, differential interferometry system comprises and setting gradually along optical axis direction:
Second fiber coupler 112, second fiber coupler 112 is connected with the first fiber coupler 111 by optical fiber; Second corner cube mirror 32, makes to reflect completely after miter angle incidence from the laser of the second fiber coupler 112 outgoing; An attenuator 13, makes the laser intensity reflected through the second corner cube mirror 32 be decayed; 4th fiber coupler the 122, four fiber coupler 122 is connected with the 3rd fiber coupler 121 by optical fiber; 3rd corner cube mirror 33, makes to reflect completely after miter angle incidence from the laser of the 4th fiber coupler 122 outgoing; Second half-reflecting half mirror 22, makes the laser after attenuator 13 after 45 degree of incidences, form two-pass DINSAR from two surfaces with the laser after the 3rd corner cube mirror 33 reflects and interferes laser signal; A photodetector 14, makes two-pass DINSAR interfere laser signal to be converted into electric signal; A high accuracy number phasometer 15, for interfering the phase error of laser signal to carry out accurately detecting to the two-pass DINSAR comprised in the electric signal imported into from photodetector 14.
Also comprise a phase-locked control system, analyzing and processing is carried out to the phase error detected, and the phase place of local laser is modulated, make local laser phase follow the tracks of incident laser phase place and lock.
Further, phase-locked control system comprises:
A second computer 192, for gather, store high accuracy number phasometer 15 survey the real-time phase data of differential interferometry laser signal, generate phase control signal by pid control algorithm, then be converted to local voltage modulation signal; Second program-controlled voltage source 182, for receiving the local voltage modulation signal that second computer 192 sends, second electro-optic phase modulator 9 is modulated, the phase place of the phase place of local laser to incident laser is made to follow the tracks of and lock, realize, to Phase Tracking locking in incident laser, namely realizing the phase-locked of two paths of signals.Phase-locked control system flow process is see Fig. 3.EOM phase modulation bibliography: " integrated electro-optic modulation theory and technology " Chen Fushen writes, National Defense Industry Press P30(1.7 electrooptical modulation).
Concrete operation step is:
1) open 1064nm laser instrument 1, after the preheated one-section time, open frequency regulator and first sound optical frequency shifter 41 and second sound optical frequency shifter 42 power supply.Laser instrument 1 exports 90 degree of linearly polarized lasers;
2) through the first half-reflecting half mirror 21, laser is divided into two-way, and light intensity reduces by half;
3) two-way laser is separately respectively through an acousto-optic frequency shifters, wedge, 90 degree of polaroids, two-way laser produces the relation of frequency difference 1MHz(differential frequency design and Doppler shift: space double star exists Doppler shift, for accurate reflected measurement signal, laser difference frequency is needed to be greater than Doppler shift frequency difference, numerical value be come according to different goals in research fixed, frequency difference as gravimetric in advanced person is 1MHz, the frequency difference of gravitational wave detection is 20MHz), and correct the laser direction deflection because acousto-optic frequency shifters causes through wedged plate;
4) two-way laser enters electro-optic phase modulator separately respectively, and two-way laser is respective through faraday isolator again, prevents laser return laser light device, affects laser instrument and normally work, and two-way laser signal is respectively as incident laser and local laser;
5) the first computing machine 191 controls the first program-controlled voltage source 181 and regulates and controls the first electro-optic phase modulator 8, carrys out the star spacing change that simulated target signal causes, i.e. phase offset;
6) incident laser is after the second corner cube mirror 32, to be decayed light intensity by attenuator 13, then arrives half-reflecting half mirror 22;
7) local laser is after the 3rd corner cube mirror 33, arrives the second half-reflecting half mirror 22;
8) after the second half-reflecting half mirror 22, differential interferometry laser signal is formed;
9) difference light signal is converted into electric signal by photodetector 14;
10) phase error of high accuracy number phasometer 15 accurately detecting two-way interference signal;
11) the first computing machine 192 utilizes this phase error signal, by Adaptive PID Control method FEEDBACK CONTROL second program-controlled voltage source 182 optimized, carry out the automatically controlled phase modulation of the second electro-optic phase modulator 9, make the phase place of the phase place of local laser to incident laser follow the tracks of and lock.
The analogue means of a kind of space laser interference system low light level phaselock technique that the present embodiment provides adopts secondary vibrating isolation system, and it is made up of independent ground and consecutive victories vibration-isolating platform, and isolation frequency is greater than 1Hz.By secondary vibrating isolation system can effectively isolator surface vibration and other dither on the impact of experiment porch.
Adopt high vacuum system and invar platform.High vacuum system, by mechanical pump, molecular pump and ionic pump three grades cooperation, can reach 10
-5the vacuum tightness of Pa.It can reduce the impact of atmospheric disturbance and virtual space vacuum environment.The expansion coefficient of invar is 10
-8/ DEG C.By vacuum system and invar optical table, can effectively suppress thermonoise on the impact of laser phase-locked control system.
Adopt electromagnetic shielding system.The interference of external electromagnetic radiation is one of Main Noise Sources of photodetector.For this noise like, we adopt electromagnetic shielding system.Electromagnetic shielding system is that 30mm steel cavity is formed by thickness.It effectively can shield extraneous electromagnetic interference (EMI) to the impact of photodetector.
Embodiment two
In order to reduce the impact of optical fiber on experimental result, invention further provides the analogue means of preferred a kind of space laser interference system low light level phaselock technique, see Fig. 4.Omit with embodiment one same section.
Comprise an incident laser arm, for generation of the polarized incident laser that collimation, monochrome, polarization state, intensity and phase place are controlled.
Further, incident laser arm comprises and setting gradually along optical axis direction:
A 1064nm laser instrument 1 is 1064nm45 degree linearly polarized laser for generation of wavelength; First faraday isolator 101, incident polarization direction is 45 degree, and outgoing polarization direction is 90 degree, identical with the polarization needed for EOM, for adjusting the laser of process, preventing laser return laser light device, affecting laser instrument and normally work; First half-reflecting half mirror 21, be divided into two-way after making laser incidence, light intensity reduces by half, and two ways of optical signals is respectively as incident laser and local laser; A first sound optical frequency shifter 41, makes the laser that reflected by half-reflecting half mirror 21 through shift frequency later; First wedged plate 51, makes to be corrected by the deflection of the laser direction caused after first sound optical frequency shifter 41 shift frequency; First corner cube mirror 31, makes laser through the first wedged plate 51 by 90 degree of reflections; An one 90 degree of polaroid 61, calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard; First electro-optic phase modulator 8, for carrying out phase modulation to the laser of process under the control of echo signal analog control system.
Also comprise an echo signal analog control system, be connected with incident laser arm, for modulating the phase place of incident laser.
Further, echo signal analog control system comprises:
First computing machine 191, for inputting, the True Data of storage space echo signal, be converted to double star spacing data again, be converted to incident laser phase data again, analyze data again, extract feature, Modling model, is converted to echo signal simulation softward, phase control signal is converted to target voltage modulation signal.
First program-controlled voltage source 181, for the target voltage modulation signal that receiving computer sends, modulates the first electro-optic phase modulator 8.
Also comprise a local laser arm, for generation of the local laser of the polarization that collimation, monochrome, polarization state, intensity and phase place are controlled.
Further, local laser arm comprises and setting gradually along optical axis direction:
A second sound optical frequency shifter 42, makes by the laser of the first half-reflecting half mirror 21 transmission through shift frequency later, and the frequency difference needed for producing with the laser through first sound optical frequency shifter 41; Second wedged plate 52, makes to be corrected by the deflection of the laser direction caused after second sound optical frequency shifter 42 shift frequency; Second corner cube mirror 32, makes laser through the second wedged plate 52 by 90 degree of reflections; One the 2 90 degree polaroid 62 calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard; Second electro-optic phase modulator 9, for carrying out phase modulation to the laser of process under the control of phase-locked control system, makes phase place identical with incident laser.
Also comprise a differential interferometry system, be connected with incident laser arm and local laser arm, form two-pass DINSAR interfere laser signal for decaying to the intensity of incident laser and incident laser and the local laser after decay being converged, accurately detecting is carried out to the phase error of two-pass DINSAR interference laser signal.
Further, differential interferometry system comprises and setting gradually along optical axis direction:
An attenuator 13, makes the laser intensity through the first electro-optic phase modulator 8 be decayed; Second half-reflecting half mirror 22, makes the laser after attenuator 13 and after 45 degree of incidences, forms two-pass DINSAR from two surfaces through the laser of the second electro-optic phase modulator 9 to interfere laser signal; A photodetector 14, makes two-pass DINSAR interfere laser signal to be converted into electric signal; A high accuracy number phasometer 15, for interfering the phase error of laser signal to carry out accurately detecting to the two-pass DINSAR comprised in the electric signal imported into from photodetector 14.
Also comprise a phase-locked control system, analyzing and processing is carried out to the phase error detected, and the phase place of local laser is modulated, make the phase place of local laser follow the tracks of incident laser phase place and lock.
Further, phase-locked control system comprises:
A second computer 192, for gather, store high accuracy number phasometer 15 survey the real-time phase data of differential interferometry laser signal, generate phase control signal by pid control algorithm, then be converted to local voltage modulation signal; Second program-controlled voltage source 182, for the local voltage modulation signal that receiving computer sends, modulates the second electro-optic phase modulator 9, makes the phase place of the phase place of local laser to incident laser follow the tracks of and lock, namely realizes the phase-locked of two paths of signals.
Concrete operation step is:
1) open 1064nm laser instrument 1, after the preheated one-section time, open frequency regulator and acousto-optic frequency shifters power supply.Laser instrument exports 45 degree of linearly polarized lights;
2) laser is through the first faraday isolator 101, prevents laser return laser light device, affects laser instrument and normally work, and through the first half-reflecting half mirror 21, laser is divided into two-way, and light intensity reduces by half, and two ways of optical signals is respectively as incident laser and local laser;
3) two-way laser is separately respectively through acousto-optic frequency shifters, wedge, a corner cube mirror, 90 degree of polaroids, and two-way laser produces frequency difference 1MHz, and corrects the laser direction deflection because acousto-optic frequency shifters causes through wedged plate; Two-way laser enters electro-optic phase modulator separately respectively;
4) the first computing machine 191 controls the first program-controlled voltage source 181 and regulates and controls the first electro-optic phase modulator 8, carrys out the double star spacing change that simulated target signal causes, i.e. phase offset;
5) incident laser, to be decayed light intensity by attenuator 13, then arrives the second half-reflecting half mirror 22;
6) local laser arrives the second half-reflecting half mirror 22;
7) after the second half-reflecting half mirror 22, differential interferometry laser signal is formed;
8) difference light signal is converted into electric signal by photodetector 14;
9) phase error of high accuracy number phasometer 15 accurately detecting two-way interference signal;
10) second computer 192 utilizes this phase error signal, by Adaptive PID Control method FEEDBACK CONTROL second program-controlled voltage source 182 optimized, carry out the automatically controlled phase modulation of the second electro-optic phase modulator, make the phase place of the phase place of local laser to incident laser follow the tracks of and lock.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. an analogy method for space laser interference system low light level phaselock technique, is characterized in that, comprise the steps:
A () produces the controlled polarized incident laser of collimation, monochrome, polarization state, intensity and phase place and polarization this locality laser;
B (), by echo signal analog control system, modulates the phase place of described incident laser, be used for simulated target signal;
C (), by differential interferometry system, decaying to the intensity of incident laser and described incident laser and described local laser being converged forms two-pass DINSAR and interferes laser signal;
D (), by phase-locked control system, modulates the phase place of described local laser, make the phase place of phase place to incident laser of described local laser follow the tracks of and lock;
Described step (a) specifically comprises the steps:
1) open 1064nm laser instrument (1), open frequency regulator and acousto-optic frequency shifters power supply after the preheated one-section time, laser instrument exports 45 degree of linearly polarized lights;
2) laser is through the first faraday isolator (101), prevent laser return laser light device, affect laser instrument and normally work, through the first half-reflecting half mirror (21), the two-way that laser is divided into light intensity equal, two ways of optical signals is respectively as incident laser and local laser;
3) two-way laser is separately respectively through acousto-optic frequency shifters, wedge, a corner cube mirror, 90 degree of polaroids, and two-way laser produces frequency difference 1MHz, and corrects the laser direction deflection because acousto-optic frequency shifters causes through wedged plate; Two-way laser enters electro-optic phase modulator separately respectively;
Described step (b) specifically comprises the steps:
4) the first computing machine (191) controls the first program-controlled voltage source (181) and regulates and controls the first electro-optic phase modulator (8), simulates the phase place change that the double star spacing change that caused by echo signal to be measured is corresponding;
Described step (c) specifically comprises the steps:
5) incident laser, by attenuator (13) decay light intensity, then arrives the second half-reflecting half mirror (22);
6) local laser arrives the second half-reflecting half mirror (22);
7) after the second half-reflecting half mirror (22), differential interferometry laser signal is formed;
8) difference light signal is converted into electric signal by photodetector (14);
9) phase error of high accuracy number phasometer (15) accurately detecting two-way interference signal;
Described step (d) specifically comprises the steps:
10) second computer (192) utilizes this phase error signal, by the Adaptive PID Control method FEEDBACK CONTROL second program-controlled voltage source (182) optimized, carry out the automatically controlled phase modulation of the second electro-optic phase modulator, make the phase place of the phase place of local laser to incident laser follow the tracks of and lock.
2. an analogy method for space laser interference system low light level phaselock technique, is characterized in that, comprise the steps:
A () produces the controlled polarized incident laser of collimation, monochrome, polarization state, intensity and phase place and polarization this locality laser;
B (), by echo signal analog control system, modulates the phase place of described incident laser, be used for simulated target signal;
C (), by differential interferometry system, decaying to the intensity of incident laser and described incident laser and described local laser being converged forms two-pass DINSAR and interferes laser signal;
D (), by phase-locked control system, modulates the phase place of described local laser, make the phase place of phase place to incident laser of described local laser follow the tracks of and lock;
Described step (a) specifically comprises the steps:
1) open 1064nm laser instrument, open frequency regulator and acousto-optic frequency shifters power supply after the preheated one-section time, laser instrument exports 90 degree of linearly polarized lights;
2) through the first half-reflecting half mirror (21), the two-way that laser is divided into light intensity equal;
3) two-way laser is separately respectively through an acousto-optic frequency shifters, wedge, 90 degree of polaroids, the frequency difference 1MHz needed for two-way laser produces, and corrects the laser direction deflection because acousto-optic frequency shifters causes through wedged plate;
4) two-way laser enters electro-optic phase modulator separately respectively; Two-way laser is respective through faraday isolator again, prevents laser return laser light device, affects laser instrument and normally work, and two ways of optical signals is respectively as incident laser and local laser;
Described step (b) specifically comprises the steps:
5) the first computing machine (191) controls the first program-controlled voltage source (181) and regulates and controls the first electro-optic phase modulator (8), simulates the phase place change that the double star spacing change that caused by echo signal to be measured is corresponding;
Described step (c) specifically comprises the steps:
6) incident laser is after the second corner cube mirror (32), by attenuator (13) decay light intensity, then arrives the second half-reflecting half mirror (22);
7) local laser is after the 3rd corner cube mirror (33), arrives the second half-reflecting half mirror (22);
8) after the second half-reflecting half mirror (22), differential interferometry laser signal is formed;
9) difference light signal is converted into electric signal by photodetector (14);
10) phase error of high accuracy number phasometer (15) accurately detecting two-way interference signal;
Described step (d) specifically comprises the steps:
11) second computer (192) utilizes this phase error signal, by the Adaptive PID Control method FEEDBACK CONTROL second program-controlled voltage source (182) optimized, carry out the automatically controlled phase modulation of the second electro-optic phase modulator (9), make the phase place of the phase place of local laser to incident laser follow the tracks of and lock.
3. an analogue means for space laser interference system low light level phaselock technique, is characterized in that, at least comprise:
One incident laser arm, for generation of the polarized incident laser that collimation, monochrome, polarization state, intensity and phase place are controlled;
One echo signal analog control system, is connected with described incident laser arm, for modulating the phase place of described incident laser;
One local laser arm, for generation of the local laser of the polarization that collimation, monochrome, polarization state, intensity and phase place are controlled;
One differential interferometry system, be connected with described incident laser arm and described local laser arm, form two-pass DINSAR interfere laser signal for decaying to the intensity of described incident laser and incident laser and the described local laser after decay being converged, accurately detecting is carried out to the phase error of two-pass DINSAR interference laser signal;
One phase-locked control system, carries out analyzing and processing to the phase error detected, and modulates the phase place of described local laser, makes the phase place of phase place to incident laser of described local laser follow the tracks of and lock;
Described incident laser arm comprises and setting gradually along optical axis direction:
A 1064nm laser instrument (1) is 1064nm 45 degree of linearly polarized lasers for generation of wavelength;
First faraday isolator (101), incident polarization direction is 45 degree, and outgoing polarization direction is 90 degree, for adjusting the laser of process, preventing laser return laser light device, affecting laser instrument and normally work;
First half-reflecting half mirror (21), the two-way being divided into light intensity equal after making laser incidence, two ways of optical signals is respectively as incident laser and local laser;
A first sound optical frequency shifter (41), makes the laser that reflected by described half-reflecting half mirror (21) through shift frequency later;
First wedged plate (51), makes to be corrected by the deflection of the laser direction caused after described first sound optical frequency shifter (41) shift frequency;
First corner cube mirror (31), makes laser through described first wedged plate (51) by 90 degree of reflections;
An one 90 degree of polaroid (61), calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
First electro-optic phase modulator (8), for carrying out phase modulation to the laser of process under the control of described echo signal analog control system;
Described echo signal analog control system comprises:
First computing machine (191), for inputting, the True Data of storage space echo signal, be converted to double star spacing data again, be converted to incident laser phase data again, analyze data again, extract feature, Modling model, utilizes echo signal simulation softward, phase control signal is converted to target voltage modulation signal;
First program-controlled voltage source (181), for receiving the target voltage modulation signal that described first computing machine sends, modulates described first electro-optic phase modulator (8);
Described local laser arm comprises and setting gradually along optical axis direction:
A second sound optical frequency shifter (42), makes by the laser of described first half-reflecting half mirror (21) transmission through shift frequency later, and the frequency difference needed for producing with the laser through first sound optical frequency shifter (41);
Second wedged plate (52), makes to be corrected by the deflection of the laser direction caused after described second sound optical frequency shifter (42) shift frequency;
Second corner cube mirror (32), makes laser through described second wedged plate (52) by 90 degree of reflections;
A 2 90 degree of polaroid (62), calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
Second electro-optic phase modulator (9), for carrying out phase modulation to the laser of process under the control of described phase-locked control system, makes phase place identical with incident laser;
Described differential interferometry system comprises and setting gradually along optical axis direction:
An attenuator (13), makes the described laser intensity through the first electro-optic phase modulator (8) be decayed;
Second half-reflecting half mirror (22), makes the laser after described attenuator (13) and form two-pass DINSAR after the laser of described second electro-optic phase modulator (9) is incident along 45 degree from two surfaces to interfere laser signal;
A photodetector (14), makes described two-pass DINSAR interfere laser signal to be converted into electric signal;
A high accuracy number phasometer (15), carries out accurately detecting for interfering the phase error of laser signal to the described two-pass DINSAR comprised in the described electric signal imported into from described photodetector (14);
Described phase-locked control system comprises:
A second computer (192), for gather, store described high accuracy number phasometer (15) survey the real-time phase error information of differential interferometry laser signal, generate phase control signal by pid control algorithm, then be converted to local voltage modulation signal;
Second program-controlled voltage source (182), for receiving the described local voltage modulation signal that described second computer sends, described second electro-optic phase modulator (9) is modulated, the phase place of the phase place of local laser to incident laser is made to follow the tracks of and lock, realize, to Phase Tracking locking in incident laser, namely realizing the phase-locked of two paths of signals.
4. an analogue means for space laser interference system low light level phaselock technique, is characterized in that, at least comprise:
One incident laser arm, for generation of the polarized incident laser that collimation, monochrome, polarization state, intensity and phase place are controlled;
One echo signal analog control system, is connected with described incident laser arm, for modulating the phase place of described incident laser;
One local laser arm, for generation of the local laser of the polarization that collimation, monochrome, polarization state, intensity and phase place are controlled;
One differential interferometry system, be connected with described incident laser arm and described local laser arm, form two-pass DINSAR interfere laser signal for decaying to the intensity of described incident laser and incident laser and the described local laser after decay being converged, accurately detecting is carried out to the phase error of two-pass DINSAR interference laser signal;
One phase-locked control system, carries out analyzing and processing to the phase error detected, and modulates the phase place of described local laser, makes the phase place of phase place to incident laser of described local laser follow the tracks of and lock;
Described incident laser arm comprises and setting gradually along optical axis direction:
A 1064nm laser instrument (1) is 1064nm 90 degree of linearly polarized lasers for generation of wavelength;
First half-reflecting half mirror (21), the two-way being divided into light intensity equal after making laser incidence;
A first sound optical frequency shifter (41), makes by the laser of described half-reflecting half mirror (21) transmission through shift frequency later;
First wedged plate (51), makes to be corrected by the deflection of the laser direction caused after described first sound optical frequency shifter (41) shift frequency;
An one 90 degree of polaroid (61), calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
First electro-optic phase modulator (8), for carrying out phase modulation to the laser of process under the control of described echo signal analog control system;
First faraday isolator (101), for adjusting the laser of process, preventing laser return laser light device, affecting laser instrument and normally work;
First fiber coupler (111), for being delivered to the second fiber coupler (112) by laser by optical fiber;
Described echo signal analog control system comprises:
First computing machine (191), for inputting, the True Data of storage space echo signal, be converted to double star spacing data again, be converted to incident laser phase data again, analyze data again, extract feature, Modling model, utilizes echo signal simulation softward, phase control signal is converted to target voltage modulation signal;
First program-controlled voltage source (181), for receiving the target voltage modulation signal that described first computing machine sends, modulates described first electro-optic phase modulator (8);
Described local laser arm comprises and setting gradually along optical axis direction:
First corner cube mirror (31), makes the laser by described first half-reflecting half mirror (21) is reflected reflect completely after miter angle incidence, and propagates along optical axis direction;
A second sound optical frequency shifter (42), makes the laser that reflected by described first corner cube mirror (31) through shift frequency later, and the frequency difference needed for producing with the laser through first sound optical frequency shifter (41);
Second wedged plate (52), makes to be corrected by the deflection of the laser direction caused after described second sound optical frequency shifter (42) shift frequency;
A 2 90 degree of polaroid (62), calibration of laser polarization state, 90 degree of linearly polarized lasers that shoot laser is maintained the standard;
Second electro-optic phase modulator (9), for carrying out phase modulation to the laser of process under the control of described phase-locked control system, makes phase place identical with incident laser;
Second faraday isolator (102), for adjusting the laser of process, preventing laser return laser light device, affecting laser instrument and normally work;
3rd fiber coupler (121), for being delivered to the 4th fiber coupler (122) by laser by optical fiber;
Described differential interferometry system comprises and setting gradually along optical axis direction:
Second fiber coupler (112), described second fiber coupler (112) is connected with described first fiber coupler (111) by optical fiber;
Second corner cube mirror (32), makes to reflect completely after miter angle incidence from the laser of described second fiber coupler (112) outgoing;
An attenuator (13), makes the laser intensity reflected through described second corner cube mirror (32) be decayed;
4th fiber coupler (122), described 4th fiber coupler (122) is connected with described 3rd fiber coupler (121) by optical fiber;
3rd corner cube mirror (33), makes to reflect completely after miter angle incidence from the laser of described 4th fiber coupler (122) outgoing;
Second half-reflecting half mirror (22), forms two-pass DINSAR after making the laser after described attenuator (13) and the laser after described 3rd corner cube mirror (33) reflects incident along 45 degree from two surfaces and interferes laser signal;
A photodetector (14), makes described two-pass DINSAR interfere laser signal to be converted into electric signal;
A high accuracy number phasometer (15), carries out accurately detecting for interfering the phase error of laser signal to the described two-pass DINSAR comprised in the described electric signal imported into from described photodetector (14);
Described phase-locked control system comprises:
A second computer (192), for gather, store described high accuracy number phasometer (15) survey the real-time phase error information of differential interferometry laser signal, generate phase control signal by pid control algorithm, then be converted to local voltage modulation signal;
Second program-controlled voltage source (182), for receiving the described local voltage modulation signal that described second computer sends, described second electro-optic phase modulator (9) is modulated, the phase place of the phase place of local laser to incident laser is made to follow the tracks of and lock, realize, to Phase Tracking locking in incident laser, namely realizing the phase-locked of two paths of signals.
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| EP3236282A1 (en) | 2016-04-22 | 2017-10-25 | Hexagon Technology Center GmbH | Dynamic range extension of a distance measuring device with a variable optical attenuator in the transmission channel |
| CN109193339B (en) * | 2018-10-10 | 2019-08-23 | 中国科学院合肥物质科学研究院 | A kind of adjusting method and system of laser output wavelength |
| CN110346017A (en) * | 2019-06-14 | 2019-10-18 | 武汉大学 | A kind of oil tank level detection system and detection method based on infrared remote control and laser ranging |
| CN113607047B (en) * | 2021-08-04 | 2022-04-22 | 中国科学院长春光学精密机械与物理研究所 | Heterodyne interference signal simulation system |
| CN114826426B (en) * | 2022-06-24 | 2022-10-18 | 国科大杭州高等研究院 | Parameter-adaptive high-precision digital laser phase locking system and method |
| CN115342737B (en) * | 2022-09-06 | 2024-04-16 | 中国科学院长春光学精密机械与物理研究所 | Inter-satellite laser heterodyne interference signal multi-frequency information capturing system and capturing method thereof |
| CN116184518B (en) * | 2023-02-08 | 2024-04-16 | 中国科学院力学研究所 | Laser pointing and phase locking control simulation method and system |
| CN116093727B (en) * | 2023-02-08 | 2024-01-23 | 中国科学院力学研究所 | Injection type laser phase locking control method and device for space gravitational wave detection |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168944A (en) * | 2010-12-24 | 2011-08-31 | 中国科学院上海光学精密机械研究所 | Double frequency laser interferometer for absolute distance measurement and measurement method thereof |
-
2013
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168944A (en) * | 2010-12-24 | 2011-08-31 | 中国科学院上海光学精密机械研究所 | Double frequency laser interferometer for absolute distance measurement and measurement method thereof |
Non-Patent Citations (4)
| Title |
|---|
| Auxiliary functions of the LISA laser link: ranging,clock noise transfer and data communication;Gerhard Heinzel et al;《CLASSICAL AND QUANTUM GRAVITY》;20111231;第28卷;文章正文第1部分，第5部分及图5 * |
| Laser Interferometer Used for Satellite–Satellite Tracking: an On-Ground Methodological Demonstration;LI Yu-Qiong et al;《CHIN. PHYS. LETT.》;20121231;第29卷(第7期);全文 * |
| Laser Phase-Locking Techniques for LISA :Experimental Status;P.W.McNamara et al;《Laser Interferometer Space Antenna》;19981231;全文 * |
| Weak-light phase locking for LISA;Paul W McNamara;《CLASSICAL AND QUANTUM GRAVITY》;20050421;第22卷;全文 * |
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