CN106443710B - A kind of dual wavelength polarization high spectral resolution laser radar apparatus - Google Patents
A kind of dual wavelength polarization high spectral resolution laser radar apparatus Download PDFInfo
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
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- G01S7/4802—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
A kind of dual wavelength polarization high spectral resolution laser radar apparatus, the present invention realizes the separation of atmospheric molecule backscatter signal and atmospheric aerosol backscatter signal by confocal Fabry Perot optical filter and single-frequency polarization laser, and confocal Fabry Perot filter center is emitted into laser frequency real-time lock through frequency and single-frequency polarization laser using Frequency Locking system, to realize that high spectral resolution detects.The present invention is not limited by wavelength, spectrally resolved ability is strong, Frequency Locking stability is good, can be used for the kinds of platform such as spaceborne, airborne and ground.
Description
Technical field
The present invention relates to a kind of dual wavelengths to polarize high spectral resolution laser radar apparatus, belongs to laser radar technique field.
Background technology
Atmospheric aerosol plays very important role in climate change and air pollution.Laser radar technique by
It is proved to be effective atmospheric aerosol monitoring means, high spatial and the Optical Properties of Aerosol of temporal resolution can be obtained
Vertical distribution.Traditional elastic scattering laser radar, cannot be direct due to cannot distinguish between atmospheric aerosol scattering and molecular scattering
Measure aerosol optical characteristics, it is necessary to assume that then Lidar Ratios recycle Klett and Fernald methods to carry out inverting and obtain
It arrives.Raman lidar, which can not use, to be assumed to measure the optical characteristics of aerosol, but since signal is compared with elastic scattering letter
Number weak about three orders of magnitude are typically only capable to carry out night or close-in measurement, this makes its application be restricted, and is especially not suitable for
For Space-borne.High spectral resolution laser radar realizes Rayleigh scattering in elastic scattering signal by high spectral resolution optical filter
The separation of signal (predominantly atmospheric molecule scattered signal) and Mie scattering signal (predominantly atmospheric aerosol scattering signal), to
It can not have to assume that direct inversion goes out atmospheric parameter, since measuring signal is elastic scattering signal, daytime and night can work,
It is applicable to the kinds of platform such as spaceborne, airborne and ground.
High spectral resolution optical filter is high spectral resolution laser radar core technology, is currently mainly had based on atom or molecule
The optical filter of vapor absorption, the optical filter based on plane Fabry-Perot interferometers and dry based on field widening Michelson
The optical filter of interferometer.The Absorption Line attenuation center of atom or molecule is mainly utilized based on the optical filter that atom or molecular vapors absorb
Aerosol Mie scattering peak, through absorption spectrum outside atmospheric molecule Rayleigh scattering signal, to realize aerosol scattering signal
With the separation of atmospheric molecule scattered signal.But for common optical maser wavelength, few atoms or molecular vapors absorption peak are just
With these consistent wavelengths, currently available mainly iodine steam absorption filter is used for 532nm optical maser wavelengths.Atom or molecule
The main problem of vapor absorption optical filter is to greatly limit the wavelength available of laser.Interfered based on plane Fabry-Perot
The optical filter of instrument theoretically can be used for arbitrary wavelength, and main problem is that field angle is too small, can not be received with telescope
Wide angle optical signal matches, and causes light-inletting quantity small, and can also cause adjustment difficult since visual field is small, easily vibrated etc. external rings
Border influences.One of traditional Michelson's interferometer arm is changed to by the optical filter based on field widening Michelson's interferometer
Non-air medium so as to realize wide visual field, and is not limited by wavelength, but field widening Michelson's interferometer frequency
Resolution ratio is relatively low, and makes more complex.
Invention content
The technology of the present invention solves the problems, such as：Overcome above-mentioned the deficiencies in the prior art, it is proposed that a kind of dual wavelength polarization is high
Spectrally resolved laser radar apparatus, the device be based on confocal Fabry Perot optical filter, do not limited by wavelength, field angle is larger,
Frequency resolution height is, it can be achieved that be precisely separated aerosol Mie scattering signal and atmospheric molecule Rayleigh scattering signal.
The technical solution adopted by the present invention is：
A kind of dual wavelength polarization high spectral resolution laser radar apparatus, including：Laser transmitting system, optical receiving system and
Data processing unit；
Laser transmitting system emits single-frequency polarized pulses laser into tested air, and optical receiving system, which receives, is tested air
Rear orientation light, later successively carry out color separation processing, polarization spectro processing, ultra-narrow bandwidth filter processing and opto-electronic conversion, will
The rear orientation light of the tested air is converted to electric signal, finally carries out data processing by data processing unit, is tested
The dual wavelength of air polarizes EO-1 hyperion laser radar signal.
The laser transmitting system includes single-frequency polarization laser and beam expanding lens, and wherein single-frequency polarization laser includes kind again
Sub- laser and pulse laser；
Seed laser emits single-frequency laser, and the single-frequency laser that seed laser emits is carried out shaping and put by pulse laser
Greatly, output dual wavelength pure-tone pulse laser reduces the angle of divergence of the pure-tone pulse laser using beam expanding lens, by pure-tone pulse
In Laser emission to tested air.
The single-frequency laser that the single-frequency laser of the seed laser transmitting is wavelength 1064nm.
The dual wavelength pure-tone pulse laser of the output is the list of the pure-tone pulse laser and wavelength 532nm of wavelength 1064nm
Frequency pulse laser.
The optical receiving system includes telescope, the first dichronic mirror, the second dichronic mirror, ambient light filter, polarization spectro
Mirror, 1/4 slide, light combination mirror, confocal Fabry Perot optical filter, frequency modulator, the first photodetector, the second photodetection
Device, third photodetector, the 4th photodetector and the 5th photodetector；
Telescope receives the rear orientation light for being tested air, carries out color separation by the first dichronic mirror, is by the wavelength of generation
The light of 1064nm is sent into the first photodetector, after the light of wavelength 532nm is by ambient light filter wiping out background light, into polarization
Spectroscope is divided, and is sent into the second photodetector all the way and is detected, and another way closes beam by entering after 1/4 slide
Single-frequency laser from seed laser is modulated by mirror, frequency modulator, is re-fed into light combination mirror, and light combination mirror will enter into it
In two-way light carry out conjunction beam, be re-fed into confocal Fabry Perot optical filter, confocal Fabry Perot optical filter is by the light of input
Signal carries out the separation detection of aerosol scattering signal and atmospheric molecule scattered signal, the reflection of confocal Fabry Perot optical filter
Light is reflected into third photodetector again through after 1/4 slide by polarization spectroscope, meanwhile, aerosol scattering signal and
Modulated single-frequency laser is believed after penetrating confocal Fabry Perot optical filter by the progress color separation of the second dichronic mirror, aerosol scattering
It number is received by the 4th photodetector, modulated single-frequency laser receives by the 5th photodetector, five photodetectors
It exports electric signal and is sent into data processing unit progress data processing.
The confocal Fabry Perot optical filter uses confocal curved surface chamber mode, and curved surface chamber radius of curvature is 1cm, through band
Width is less than 1GHz.
It is 1 ° that the telescope, which uses Cassegrain telescope, bore 1m, field angle,.
The ambient light filter is in such a way that interferometric filter and Fabry Perot etalon are compound, through laser band
Width is 10GHz.
Seed laser, frequency modulator and the cooperation of the 5th photodetector are realized in confocal Fabry Perot optical filter
Cardiac wave length emits single-frequency polarization laser the locking of optical maser wavelength, specially：
The single-frequency laser of seed laser transmitting, enters confocal Fabry Perot optical filter after frequency modulator, utilizes
Frequency modulator is performed a scan centered on single-frequency laser wavelength, light when by the 5th photodetectors register different frequency
By force, the corresponding wavelength in analysis light intensity sequence signal maximizing position exports single-frequency by this wavelength and seed laser and swashs
The difference signal of the wavelength of light realizes the feedback control that wavelength is penetrated to confocal Fabry Perot filter center, to realize to list
Frequency polarization laser emits the locking of optical maser wavelength
What the present invention was brought compared with the prior art has the beneficial effect that：
(1) present invention realizes that dual wavelength polarizes high spectral resolution laser radar, realizes efficient, high-resolution air Mie scattering
With the information extraction of the EO-1 hyperion, polarization dual-wavelength of Rayleigh scattering；
(2) present invention uses the optical filter based on confocal fabry perot interferometer, is not limited by wavelength, is adapted in wavelength
Property aspect be better than atom or molecular vapors absorption filter；Compared to the optical filter based on plane Fabry-Perot interferometers, change
It has been apt to that its visual field is small, weakness to small alignment error and vibration sensing；It is better than field widening mikey in terms of frequency resolution
The inferior interferometer of that, and it is simple in structure；
(3) present invention is while realizing the detection of wavelength high spectral resolution, detects the wavelength polarization information and another
Wavelength elastic scattering information；
(4) by using single-frequency laser, the output of dual wavelength single-frequency is realized, and high-precision realizes Fabry amber
The Frequency Locking of sieve standard improves the detection stability and efficiency of EO-1 hyperion；
(5) spike filter and the cascade mode of Fabry Perot standard are realized, realizes and bias light is efficiently inhibited
Meanwhile realizing high spectral resolution detection.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is that the present invention is based on the EO-1 hyperion optical filters of confocal fabry perot interferometer；
Fig. 3 is Frequency Locking System Working Principle schematic diagram；
Fig. 4 is the Effect on Detecting schematic diagram of this system.
Specific implementation mode
The present invention polarizes dual wavelength, polarization and EO-1 hyperion of the realization of high spectral resolution laser radar to air by dual wavelength
Detection.The granular size of the component of air can be distinguished using the information of dual wavelength, it can be with by polarization information
The shape of the component of air is distinguished, it can be with the Extinction Characteristic of air and the grain size of particle by hyperspectral information
Distribution carries out quantitative inversion.As shown in figure 4, being realized the Mie scattering and Rayleigh scattering of atmospheric echo by high spectral resolution detection
The high-resolution differentiation of echo.Dual wavelength polarization high spectral resolution laser radar realizes the inverting to the high-precision quantitative of air,
It is meteorological, atmospheric environment important detection means.
The present invention polarizes high spectral resolution laser radar by dual wavelength and realizes that dual wavelength single-frequency is defeated by single-frequency laser
Go out, the backscatter signal of air is received by telescope, passes through dichronic mirror, background optical filter, Bripello optical filter etc.
Optical element, which is realized, extracts the optical information of the polarization of echo optical signal, dual wavelength, high spectral resolution, passes through detector realization pair
The photoelectric conversion of optical signal carries out signal acquisition and processing by data processing unit, final to realize that dual wavelength polarizes EO-1 hyperion
Resolved detection.
The present invention realizes atmospheric molecule back scattering letter by confocal Fabry Perot optical filter and single-frequency polarization laser
Number and atmospheric aerosol backscatter signal separation, and using Frequency Locking system by confocal Fabry Perot filter center
Emit laser frequency real-time lock through frequency and single-frequency polarization laser, to realize that high spectral resolution detects.Single-frequency polarizes
Laser emits dual-wavelength laser, is emitted in air after beam expanding lens expands, and is scattered through aerosol in air and atmospheric molecule
Afterwards, backscatter signal is received by telescope, and after dichronic mirror is divided, the scattered signal of one of wavelength is directly visited by photoelectricity
It surveys device a to receive, another wavelength dispersion signal is incident on polarization spectroscope after ambient light filter filters, and S-polarization signal is anti-
There are photodetector b receptions, the P polarization signal of transmission to be incident on confocal Fabry Perot optical filter after 1/4 slide after penetrating,
The Mie scattering signal of transmission is received by photodetector d, and the Rayleigh scattering signal of reflection is anti-by polarization spectroscope through 1/4 slide
It is received by photodetector c after penetrating；Meanwhile seed laser exports laser through frequency modulator tune in single-frequency polarization laser
System, modulated laser signal are incident on confocal Fabry Perot optical filter, and transmission signal is received by photodetector e, passed through
Scan frequency modulator obtains the confocal Fabry Perot filter center wavelength of feedback signal control and is locked to single-frequency polarization laser
Device laser frequency.The present invention is not limited by wavelength, spectrally resolved ability is strong, Frequency Locking stability is good, can be used for spaceborne, airborne
And the kinds of platform such as ground.
As shown in Figure 1, a kind of dual wavelength provided by the invention polarizes high spectral resolution laser radar apparatus comprising：Swash
Light emission system, optical receiving system and data processing unit；
Laser transmitting system emits single-frequency polarized pulses laser into tested air, and optical receiving system, which receives, is tested air
Rear orientation light, later successively carry out color separation processing, polarization spectro processing, ultra-narrow bandwidth filter processing and opto-electronic conversion, will
The rear orientation light of the tested air is converted to electric signal, finally carries out data processing by data processing unit, is tested
The dual wavelength of air polarizes EO-1 hyperion laser radar signal.
Laser transmitting system includes single-frequency polarization laser and beam expanding lens, and wherein single-frequency polarization laser swashs including seed again
Light device and pulse laser；
Seed laser emits single-frequency laser, and the single-frequency laser that seed laser emits is carried out shaping and put by pulse laser
Greatly, output dual wavelength pure-tone pulse laser reduces the angle of divergence of the pure-tone pulse laser using beam expanding lens, by pure-tone pulse
In Laser emission to tested air.The single-frequency laser that the single-frequency laser of seed laser transmitting is wavelength 1064nm.Pair of output
Wavelength pure-tone pulse laser is the pure-tone pulse laser of the pure-tone pulse laser and wavelength 532nm of wavelength 1064nm.
Optical receiving system includes telescope, the first dichronic mirror, the second dichronic mirror, ambient light filter, polarization spectroscope, 1/
4 slides, light combination mirror, confocal Fabry Perot optical filter, frequency modulator, the first photodetector, the second photodetector,
Three photodetectors, the 4th photodetector and the 5th photodetector；
Telescope receives the rear orientation light for being tested air, carries out color separation by the first dichronic mirror, is by the wavelength of generation
The light of 1064nm is sent into the first photodetector, after the light of wavelength 532nm is by ambient light filter wiping out background light, into polarization
Spectroscope is divided, and is sent into the second photodetector all the way and is detected, and another way closes beam by entering after 1/4 slide
Single-frequency laser from seed laser is modulated by mirror, frequency modulator, is re-fed into light combination mirror, and light combination mirror will enter into it
In two-way light carry out conjunction beam, be re-fed into confocal Fabry Perot optical filter, confocal Fabry Perot optical filter is by the light of input
Signal carries out the separation detection of aerosol scattering signal and atmospheric molecule scattered signal, the reflection of confocal Fabry Perot optical filter
Light is reflected into third photodetector again through after 1/4 slide by polarization spectroscope, meanwhile, aerosol scattering signal and
Modulated single-frequency laser is believed after penetrating confocal Fabry Perot optical filter by the progress color separation of the second dichronic mirror, aerosol scattering
It number is received by the 4th photodetector, modulated single-frequency laser receives by the 5th photodetector, five photodetectors
It exports electric signal and is sent into data processing unit progress data processing.
As shown in Fig. 2, it is 1cm that confocal Fabry Perot optical filter, which uses confocal curved surface chamber mode, curved surface chamber radius of curvature,
It is less than 1GHz through bandwidth.
As shown in figure 3, confocal Fabry amber is realized in seed laser, frequency modulator and the cooperation of the 5th photodetector
Sieve filter center wavelength emits single-frequency polarization laser the locking of optical maser wavelength, specially：
The single-frequency laser of seed laser transmitting, enters confocal Fabry Perot optical filter after frequency modulator, utilizes
Frequency modulator is performed a scan centered on single-frequency laser wavelength, light when by the 5th photodetectors register different frequency
By force, the corresponding wavelength in analysis light intensity sequence signal maximizing position exports single-frequency by this wavelength and seed laser and swashs
The difference signal of the wavelength of light realizes the feedback control that wavelength is penetrated to confocal Fabry Perot filter center, to realize to list
Frequency polarization laser emits the locking of optical maser wavelength.
Embodiment：
Laser linewidth：<50MHz
Laser wavelength：1064nm, 532nm
Background optical filter：10GHz
Confocal Fabry Perot filter bandwidth：<1GHz
Detect wavelength：532nm, 1064nm
The present invention is that a kind of dual wavelength polarizes high spectral resolution laser radar apparatus, including laser diverging system, optics connect
Receipts system, Frequency Locking system, data collecting system and data processing system.Laser diverging system includes single-frequency polarization laser
Device 1 and beam expanding lens 2, wherein single-frequency polarization laser include seed laser and pulse laser again.Optical receiving system includes
Telescope 3, dichronic mirror 4, ambient light filter 6, polarization spectroscope 7,1/4 slide 11, light combination mirror 12, confocal Fabry Perot filter
Device 13, photodetector a5, photodetector b8, photodetector c9, photodetector d15.Frequency Locking system includes kind
Sub- laser, frequency modulator 10, confocal Fabry Perot optical filter 13 and photodetector e16.
Above-mentioned single-frequency polarization laser 1 uses injection seeded technology, including seed laser and pulse laser, seed to swash
Light device is single-frequency continuous wave laser, the DFB single-frequency 1064nm lasers of thorlabs companies can be selected, pulse laser is seed
Locked laser is injected, while exporting the 532nm pulse lasers after 1064nm pulse lasers and frequency multiplication, 532nm laser linewidths are small
In 50MHz.Laser beam divergence is compressed to 100urad or so by beam expanding lens 2.
Cassegrain telescope, bore 1m can be used in above-mentioned telescope 3, and field angle is 1 ° or so, minimizes difference
Visual field disc of confusion difference.
Above-mentioned dichronic mirror 4 realizes 1064nm wavelength and the separation of 532nm wavelength channels, and 1064nm wavelength channels are by APD
Detector receives.
Above-mentioned ambient light filter 6 is in such a way that interferometric filter adds Fabry-Perot etalons compound, through laser
Bandwidth is matched in 10GHz or so with the Free Spectral Range of follow-up confocal Fabry Perot optical filter 13.
Polarization spectroscope 7 uses Cube polarization spectroscopes, photodetector b8 to receive 532nm wavelength S-polarization signals.
Confocal Fabry Perot optical filter 13 uses confocal curved surface chamber mode, and curved surface chamber radius of curvature is 1cm, through bandwidth
Less than 1GHz.Confocal Fabry Perot optical filter 13 realizes aerosol scattering signal and air in atmospheric backscatter laser signal
The separation of molecular scattering signal detects, and is incident on after 1/4 slide by the 532nm wavelength P polarization signals of polarization spectroscope 7
On confocal Fabry Perot optical filter 13, the aerosol scattering signal and atmospheric molecule of centre frequency attachment about 1GHz bandwidth scatter
Signal is received after penetrating the optical filter by photodetector d15, and the atmospheric molecule scattered signal outside 1GHz bandwidth is by confocal method cloth
In Perot 13 reflect, again pass by and photodetector c9 be reflected by polarization spectroscope 7 after 1/4 slide.
Frequency Locking system is realized that confocal 13 centre wavelength of Fabry Perot optical filter emits single-frequency polarization laser and is swashed
The locking of optical wavelength.A part for the 1064nm continuous wave lasers of seed laser transmitting is through optical fiber output, through frequency modulator
Enter confocal Fabry Perot optical filter after 10, which is made of two acousto-optic modulators (AOM), acousto-optic modulator
1 realizes the frequency modulation(PFM) of 80MHz, and acousto-optic modulator 2 removes the carrier deviation of the generation of acousto-optic modulator 1, while compensating altogether
The center frequency difference that burnt Fabry Perot optical filter 13 penetrates 1064nm wavelength and 532nm wavelength.Using frequency modulator with
The frequency scanning of progress ± 80MHz centered on seed laser wavelength, by photoelectricity after the transmission of confocal Fabry Perot optical filter 13
Light intensity when detector e record different frequencies, the corresponding wavelength in analysis light intensity sequence signal maximizing position pass through this wave
The long difference signal with seed laser wavelength realizes the feedback control that wavelength is penetrated to confocal 13 center of Fabry Perot optical filter.
It is realized simultaneously when confocal Fabry Perot optical filter 13 locks 1064nm seed laser wavelength and laser signal is received to 532nm
Centre wavelength locks.
Photodetector b8, photodetector c9, photodetector d15 are PMT detectors, are operated in photon meter digital-to-analogue
Formula；Photodetector a5 detects for APD, and photodetector e16 is PIN detector, this two kinds of detector signal acquisitions use mould
Quasi- mode.
Photodetector c9 and photodetector d15 for 532nm wavelength high spectral resolutions detect, can direct inversion obtain
The optical properties parameter such as aerosol backscattering coefficient, extinction coefficient.Photodetector c9 and photodetector be d15's and signal
Combine the inverting for realizing aerosol polarization coefficient with photodetector b8.
Claims (8)
1. a kind of dual wavelength polarizes high spectral resolution laser radar apparatus, it is characterised in that including：Laser transmitting system, optics connect
Receipts system and data processing unit；
Laser transmitting system emits single-frequency polarized pulses laser into tested air, after optical receiving system receives tested air
To scattering light, color separation processing, polarization spectro processing, ultra-narrow bandwidth filter processing and opto-electronic conversion are carried out successively later, it will be described
The rear orientation light of tested air is converted to electric signal, finally carries out data processing by data processing unit, obtains tested air
Dual wavelength polarize EO-1 hyperion laser radar signal；
The optical receiving system includes telescope, the first dichronic mirror, the second dichronic mirror, ambient light filter, polarization spectroscope, 1/
4 slides, light combination mirror, confocal Fabry Perot optical filter, frequency modulator, the first photodetector, the second photodetector,
Three photodetectors, the 4th photodetector and the 5th photodetector；
Telescope receives the rear orientation light for being tested air, carries out color separation by the first dichronic mirror, is by the wavelength of generation
The light of 1064nm is sent into the first photodetector, after the light of wavelength 532nm is by ambient light filter wiping out background light, into polarization
Spectroscope is divided, and is sent into the second photodetector all the way and is detected, and another way closes beam by entering after 1/4 slide
Single-frequency laser from seed laser is modulated by mirror, frequency modulator, is re-fed into light combination mirror, and light combination mirror will enter into it
In two-way light carry out conjunction beam, be re-fed into confocal Fabry Perot optical filter, confocal Fabry Perot optical filter is by the light of input
Signal carries out the separation detection of aerosol scattering signal and atmospheric molecule scattered signal, the reflection of confocal Fabry Perot optical filter
Light is reflected into third photodetector again through after 1/4 slide by polarization spectroscope, meanwhile, aerosol scattering signal and
Modulated single-frequency laser is believed after penetrating confocal Fabry Perot optical filter by the progress color separation of the second dichronic mirror, aerosol scattering
It number is received by the 4th photodetector, modulated single-frequency laser receives by the 5th photodetector, five photodetectors
It exports electric signal and is sent into data processing unit progress data processing.
2. a kind of dual wavelength according to claim 1 polarizes high spectral resolution laser radar apparatus, it is characterised in that：It is described
Laser transmitting system includes single-frequency polarization laser and beam expanding lens, and wherein single-frequency polarization laser includes seed laser and arteries and veins again
Rush laser；
Seed laser emits single-frequency laser, and the single-frequency laser that pulse laser emits seed laser carries out shaping amplification,
Output dual wavelength pure-tone pulse laser reduces the angle of divergence of the pure-tone pulse laser using beam expanding lens, pure-tone pulse is swashed
In light emitting to tested air.
3. a kind of dual wavelength according to claim 2 polarizes high spectral resolution laser radar apparatus, it is characterised in that：It is described
The single-frequency laser that the single-frequency laser of seed laser transmitting is wavelength 1064nm.
4. a kind of dual wavelength according to claim 2 polarizes high spectral resolution laser radar apparatus, it is characterised in that：It is described
The dual wavelength pure-tone pulse laser of output is the pure-tone pulse laser of the pure-tone pulse laser and wavelength 532nm of wavelength 1064nm.
5. a kind of dual wavelength according to claim 1 polarizes high spectral resolution laser radar apparatus, it is characterised in that：It is described
It is 1cm that confocal Fabry Perot optical filter, which uses confocal curved surface chamber mode, curved surface chamber radius of curvature, is less than 1GHz through bandwidth.
6. a kind of dual wavelength according to claim 1 polarizes high spectral resolution laser radar apparatus, it is characterised in that：It is described
It is 1 ° that telescope, which uses Cassegrain telescope, bore 1m, field angle,.
7. a kind of dual wavelength according to claim 1 polarizes high spectral resolution laser radar apparatus, it is characterised in that：It is described
Ambient light filter is 10GHz through laser bandwidth in such a way that interferometric filter and Fabry Perot etalon are compound.
8. a kind of dual wavelength according to claim 1 polarizes high spectral resolution laser radar apparatus, it is characterised in that：Seed
Laser, frequency modulator and the cooperation of the 5th photodetector realize confocal Fabry Perot filter center wavelength to single-frequency
Polarization laser emits the locking of optical maser wavelength, specially：
The single-frequency laser of seed laser transmitting, confocal Fabry Perot optical filter is entered after frequency modulator, utilizes frequency
Modulator is performed a scan centered on single-frequency laser wavelength, light intensity when by the 5th photodetectors register different frequency,
The corresponding wavelength in light intensity sequence signal maximizing position is analyzed, single-frequency laser is exported by this wavelength and seed laser
The difference signal of wavelength realizes the feedback control that wavelength is penetrated to confocal Fabry Perot filter center, inclined to single-frequency to realize
The laser that shakes emits the locking of optical maser wavelength.
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