CN106443710A - Dual-wavelength polarized high-spectral-resolution laser radar device - Google Patents
Dual-wavelength polarized high-spectral-resolution laser radar device Download PDFInfo
- Publication number
- CN106443710A CN106443710A CN201610966247.8A CN201610966247A CN106443710A CN 106443710 A CN106443710 A CN 106443710A CN 201610966247 A CN201610966247 A CN 201610966247A CN 106443710 A CN106443710 A CN 106443710A
- Authority
- CN
- China
- Prior art keywords
- laser
- frequency
- wavelength
- light
- polarization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N2015/0294—Particle shape
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention relates to a dual-wavelength polarized high-spectral-resolution laser radar device. Separation of a atmospheric molecular backscattering signal and an atmospheric aerosol backscattering signal is realized by using a confocal fabry-perot filter and a single-frequency polarized laser; and then the central transmitting frequency of the confocal fabry-perot filter and the emission laser frequency of the single-frequency polarized laser are locked in real time by using a frequency locking system, thereby realizing high-spectral-resolution detection. According to the laser radar device provided by the invention, the device is free from the wavelength restriction; and the spectral resolution capability and the frequency locking stability are high. The laser radar device can be applied to satellite borne, airborne, and ground-based platforms.
Description
Technical field
The present invention relates to a kind of dual wavelength polarizes high spectral resolution laser radar apparatus, belong to laser radar technique field.
Background technology
Atmospheric aerosol plays very important role in climate change and air pollution.Laser radar technique by
Prove effective atmospheric aerosol monitoring means, it is possible to obtain the Optical Properties of Aerosol of high spatial and temporal resolution
Vertical distribution.Traditional elastic scattering laser radar is due to cannot distinguish between atmospheric aerosol scattering and molecular scattering it is impossible to directly
Measurement aerosol optical characteristics are it is necessary to assume that Lidar Ratios and then recycle Klett and Fernald method to carry out inverting and obtain
Arrive.Raman lidar can not measure aerocolloidal optical characteristics using hypothesis, but because signal is believed compared with elastic scattering
Number weak about three orders of magnitude, are typically only capable to carry out night or close-in measurement, and this makes it apply to be restricted, be particularly not suitable for
For Space-borne.High spectral resolution laser radar realizes Rayleigh scattering in elastic scattering signal by high spectral resolution filter
Signal (predominantly atmospheric molecule scattered signal) and the separation of Mie scattering signal (predominantly atmospheric aerosol scattering signal), thus
Atmospheric parameter can be gone out without assuming direct inversion, because measurement signal is elastic scattering signal, daytime and night all can work,
It is applicable to the kinds of platform such as spaceborne, airborne and ground.
High spectral resolution filter is high spectral resolution laser radar core technology, currently mainly has based on atom or molecule
The filter of vapor absorption, the filter based on plane Fabry-Perot interferometer and based on field widening Michelson do
The filter of interferometer.Mainly utilize the Absorption Line attenuation center of atom or molecule based on the filter that atom or molecular vapors absorb
Aerosol Mie scattering peak, through absorption spectrum outside atmospheric molecule Rayleigh scattering signal, thus realizing aerosol scattering signal
Separation with atmospheric molecule scattered signal.But for conventional optical maser wavelength, just seldom there are atom or molecular vapors absworption peak
With these consistent wavelength, currently available is mainly iodine steam absorption filter, for 532nm optical maser wavelength.Atom or molecule
The subject matter of vapor absorption filter is to greatly limit the wavelength available of laser instrument.Interfered based on plane Fabry-Perot
The filter of instrument can be used for any wavelength in theory, its subject matter be the angle of visual field too little it is impossible to receive with telescope
Wide angle optical signal mates, and leads to light-inletting quantity little, and adjustment also can be caused difficult because visual field is little, the external rings such as easily vibrated
Border affects.One of arm of traditional Michelson's interferometer is changed to by the filter based on field widening Michelson's interferometer
Non-air medium, such that it is able 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 complicated.
Content of the invention
The technology solve problem of the present invention is：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, this device be based on confocal Fabry Perot filter, do not limited by wavelength, the angle of visual field is larger,
Frequency resolution is high, can achieve and aerosol Mie scattering signal and atmospheric molecule Rayleigh scattering signal are precisely separated.
The technical solution used in the present invention is：
A kind of dual wavelength polarizes high spectral resolution laser radar apparatus, including：Laser transmitting system, optical receiving system and
Data processing unit；
Laser transmitting system launches single-frequency polarized pulses laser in tested air, and optical receiving system receives tested air
Rear orientation light, carry out successively afterwards color separation processing, polarization spectro process, ultra-narrow bandwidth filter process and opto-electronic conversion, will
The rear orientation light of described tested air is converted to electric signal, finally carries out data processing by data processing unit, obtains tested
The dual wavelength polarization EO-1 hyperion laser radar signal of air.
Described laser transmitting system includes single-frequency polarization laser and beam expanding lens, and wherein single-frequency polarization laser includes planting again
Sub- laser instrument and pulse laser；
Seed laser launches single-frequency laser, and the single-frequency laser that seed laser is launched is carried out shaping and puts by pulse laser
Greatly, output dual wavelength pure-tone pulse laser, then reduce the angle of divergence of described pure-tone pulse laser through beam expanding lens, by pure-tone pulse
Laser emission is in tested air.
The single-frequency laser of described seed laser transmitting is the single-frequency laser of wavelength 1064nm.
The dual wavelength pure-tone pulse laser of described output is the pure-tone pulse laser of wavelength 1064nm and the list of wavelength 532nm
Frequency pulse laser.
Described 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 filter, frequency modulator, the first photodetector, the second photodetection
Device, the 3rd photodetector, the 4th photodetector and the 5th photodetector；
Telescope receives the rear orientation light of tested air, carries out color separation by the first dichronic mirror, the wavelength of generation is
The light of 1064nm sends into the first photodetector, and the light of wavelength 532nm, after ambient light filter wiping out background light, enters polarization
Spectroscope carries out light splitting, and a road is sent into the second photodetector and detected, and enters and close bundle after separately leading up to 1/4 slide
Mirror, the single-frequency laser from seed laser is modulated by frequency modulator, is re-fed into light combination mirror, and light combination mirror will enter into it
In two-way light carry out close bundle, be re-fed into confocal Fabry Perot filter, confocal Fabry Perot filter will input light
Signal carries out aerosol scattering signal and the separation of atmospheric molecule scattered signal detects, the reflection of confocal Fabry Perot filter
Light is reflected into the 3rd photodetector again through after 1/4 slide by polarization spectroscope, meanwhile, aerosol scattering signal and
Single-frequency laser after modulation carries out color separation through after confocal Fabry Perot filter by the second dichronic mirror, and aerosol scattering is believed
Number received by the 4th photodetector, the single-frequency laser after modulation receives by the 5th photodetector, five photodetectors
Output electric signal is sent into data processing unit and is carried out data processing.
Described confocal Fabry Perot filter adopts confocal curved surface chamber mode, and curved surface chamber radius of curvature is 1cm, through band
Width is less than 1GHz.
Described telescope adopts Cassegrain telescope, bore 1m, and the angle of visual field is 1 °.
Described ambient light filter by the way of interferometric filter and Fabry Perot etalon are combined, through laser band
A width of 10GHz.
Seed laser, frequency modulator and the cooperation of the 5th photodetector are realized in confocal Fabry Perot filter
Cardiac wave length launches the locking of optical maser wavelength to single-frequency polarization laser, specially：
The single-frequency laser of seed laser transmitting, enters confocal Fabry Perot filter after frequency modulator, utilizes
Frequency modulator is performed a scan centered on single-frequency laser wavelength, by light during 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 confocal Fabry Perot filter center is passed through with the feedback control of wavelength, thus realizing to list
Frequency polarization laser launches the locking of optical maser wavelength
What hinge structure of the present invention was brought has the beneficial effect that：
(1) present invention realizes dual wavelength polarization high spectral resolution laser radar, realizes efficient, high-resolution air Mie scattering
Information extraction with the EO-1 hyperion of Rayleigh scattering, polarization dual-wavelength；
(2) present invention, using the filter based on confocal fabry perot interferometer, is not limited by wavelength, adapts in wavelength
Property aspect be better than atom or molecular vapors absorption filter；Compared to the filter based on plane Fabry-Perot interferometer, change
It has been apt to that its visual field is little, the weakness to little alignment error and vibration sensing；It is better than field widening mikey in terms of frequency resolution
The inferior interferometer of that, and structure is simple；
(3) present invention is while realizing wavelength high spectral resolution and detect, and detects this wavelength polarization information and another
Wavelength elastic scattering information；
(4) by using single-frequency laser it is achieved that the output of dual wavelength single-frequency, and high-precision achieve Fabry amber
The Frequency Locking of sieve standard, improves detection stability and the efficiency of EO-1 hyperion；
(5) realize narrow band pass filter and the mode of Fabry Perot standard cascade, realize the efficient suppression to bias light
Simultaneously it is achieved that high spectral resolution detects.
Brief description
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the EO-1 hyperion filter based on confocal fabry perot interferometer for the present invention；
Fig. 3 is Frequency Locking System Working Principle schematic diagram；
Fig. 4 is the Effect on Detecting schematic diagram of the system.
Specific embodiment
The present invention polarizes high spectral resolution laser radar by dual wavelength and realizes the dual wavelength to air, polarization and EO-1 hyperion
Detect.The information of application dual wavelength can make a distinction to the granular size of the component of air, permissible by polarization information
The shape of the component of air is made a distinction, can be with the particle diameter of the Extinction Characteristic of air and particle by hyperspectral information
Distribution carries out quantitative inversion.As shown in figure 4, detected by high spectral resolution realizing the Mie scattering of atmospheric echo and Rayleigh scattering
The high-resolution differentiation of echo.Dual wavelength polarizes the inverting that high spectral resolution laser radar achieves the high-precision quantitative to air,
It is meteorological, the important detection means of atmospheric environment.
It is defeated that the present invention realizes dual wavelength single-frequency by dual wavelength polarization high spectral resolution laser radar by single-frequency laser
Go out, receive the backscatter signal of air by telescope, by dichronic mirror, background optical filter, FP filter etc.
Optical element realizes the optical information extraction of the polarization to echo optical signal, dual wavelength, high spectral resolution, and it is right to be realized by detector
The photoelectric conversion of optical signal, carries out signals collecting and process by data processing unit, finally realizes dual wavelength polarization EO-1 hyperion
Resolved detection.
The present invention realizes atmospheric molecule back scattering letter by confocal Fabry Perot filter and single-frequency polarization laser
Number and atmospheric aerosol backscatter signal separation, and using Frequency Locking system by confocal Fabry Perot filter center
Launch laser frequency real-time lock through frequency with single-frequency polarization laser, thus realize high spectral resolution detecting.Single-frequency polarizes
Dual-wavelength laser launched by laser instrument, is transmitted in air after expanding through beam expanding lens, through aerosol in air and atmospheric molecule scattering
Afterwards, backscatter signal is received by telescope, and after dichronic mirror light splitting, the scattered signal of one of wavelength is directly by light electrical resistivity survey
Survey device a to receive, another wavelength dispersion signal incides polarization spectroscope after ambient light filter optical filtering, and S-polarization signal is anti-
Photodetector b is had to receive after penetrating, the P polarization signal of transmission incides confocal Fabry Perot filter after 1/4 slide,
The Mie scattering signal of transmission is received by photodetector d, and the Rayleigh scattering signal of reflection is through 1/4 slide, anti-by polarization spectroscope
Received by photodetector c after penetrating；Meanwhile, in single-frequency polarization laser, seed laser output laser is adjusted through frequency modulator
System, the laser signal after modulation incides confocal Fabry Perot filter, and transmission signal is received by photodetector e, passes through
Scan frequency modulator obtains feedback signal and controls confocal Fabry Perot filter center wavelength to lock onto single-frequency polarization laser
Device laser frequency.The present invention is not limited by wavelength, spectrally resolved ability strong, Frequency Locking good stability, can be used for spaceborne, airborne
And the kinds of platform such as ground.
As shown in figure 1, a kind of dual wavelength polarization high spectral resolution laser radar apparatus that the present invention provides, it includes：Swash
Light emission system, optical receiving system data processing unit；
Laser transmitting system launches single-frequency polarized pulses laser in tested air, and optical receiving system receives tested air
Rear orientation light, carry out successively afterwards color separation processing, polarization spectro process, ultra-narrow bandwidth filter process and opto-electronic conversion, will
The rear orientation light of described tested air is converted to electric signal, finally carries out data processing by data processing unit, obtains tested
The dual wavelength polarization EO-1 hyperion laser radar signal of air.
Laser transmitting system includes single-frequency polarization laser and beam expanding lens, and wherein single-frequency polarization laser includes seed again and swashs
Light device and pulse laser；
Seed laser launches single-frequency laser, and the single-frequency laser that seed laser is launched is carried out shaping and puts by pulse laser
Greatly, output dual wavelength pure-tone pulse laser, then reduce the angle of divergence of described pure-tone pulse laser through beam expanding lens, by pure-tone pulse
Laser emission is in tested air.The single-frequency laser of seed laser transmitting is the single-frequency laser of wavelength 1064nm.Export is double
Wavelength pure-tone pulse laser is the pure-tone pulse laser of wavelength 1064nm and the pure-tone pulse laser of wavelength 532nm.
Optical receiving system include telescope, the first dichronic mirror, the second dichronic mirror, ambient light filter, polarization spectroscope, 1/
4 slides, light combination mirror, confocal Fabry Perot filter, frequency modulator, the first photodetector, the second photodetector,
Three photodetectors, the 4th photodetector and the 5th photodetector；
Telescope receives the rear orientation light of tested air, carries out color separation by the first dichronic mirror, the wavelength of generation is
The light of 1064nm sends into the first photodetector, and the light of wavelength 532nm, after ambient light filter wiping out background light, enters polarization
Spectroscope carries out light splitting, and a road is sent into the second photodetector and detected, and enters and close bundle after separately leading up to 1/4 slide
Mirror, the single-frequency laser from seed laser is modulated by frequency modulator, is re-fed into light combination mirror, and light combination mirror will enter into it
In two-way light carry out close bundle, be re-fed into confocal Fabry Perot filter, confocal Fabry Perot filter will input light
Signal carries out aerosol scattering signal and the separation of atmospheric molecule scattered signal detects, the reflection of confocal Fabry Perot filter
Light is reflected into the 3rd photodetector again through after 1/4 slide by polarization spectroscope, meanwhile, aerosol scattering signal and
Single-frequency laser after modulation carries out color separation through after confocal Fabry Perot filter by the second dichronic mirror, and aerosol scattering is believed
Number received by the 4th photodetector, the single-frequency laser after modulation receives by the 5th photodetector, five photodetectors
Output electric signal is sent into data processing unit and is carried out data processing.
As shown in Fig. 2 confocal Fabry Perot filter adopts confocal curved surface chamber mode, curved surface chamber radius of curvature is 1cm,
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 launches the locking of optical maser wavelength to single-frequency polarization laser, specially：
The single-frequency laser of seed laser transmitting, enters confocal Fabry Perot filter after frequency modulator, utilizes
Frequency modulator is performed a scan centered on single-frequency laser wavelength, by light during 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 confocal Fabry Perot filter center is passed through with the feedback control of wavelength, thus realizing to list
Frequency polarization laser launches 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, connects including laser diverging system, optics
Receipts system, Frequency Locking system, data collecting system and data handling 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 planting
Sub- laser instrument, frequency modulator 10, confocal Fabry Perot filter 13 and photodetector e16.
Above-mentioned single-frequency polarization laser 1 adopts injection seeded technology, and including seed laser and pulse laser, seed swashs
Light device is single-frequency continuous wave laser, can be selected for the DFB single-frequency 1064nm laser instrument of thorlabs company, and pulse laser is seed
Injection locked laser, exports the 532nm pulse laser after 1064nm pulse laser and frequency multiplication simultaneously, and 532nm laser linewidth is little
In 50MHz.Laser beam divergence is compressed to 100urad by beam expanding lens 2.
Above-mentioned telescope 3 can adopt Cassegrain telescope, bore 1m, and the angle of visual field is 1 ° about, reduce different as far as possible
Visual field disc of confusion difference.
Above-mentioned dichronic mirror 4 is realized 1064nm wavelength and is separated with 532nm wavelength channels, and 1064nm wavelength channels are by APD
Detector receives.
Above-mentioned ambient light filter 6 using interferometric filter add Fabry-Perot etalon be combined by the way of, through laser
Bandwidth, in 10GHz, is mated with the Free Spectral Range of subsequently confocal Fabry Perot filter 13.
Polarization spectroscope 7 adopts Cube polarization spectroscope, and photodetector b8 receives 532nm wavelength S-polarization signal.
Confocal Fabry Perot filter 13 adopts confocal curved surface chamber mode, and curved surface chamber radius of curvature is 1cm, through bandwidth
Less than 1GHz.Confocal Fabry Perot filter 13 realizes aerosol scattering signal and air in atmospheric backscatter laser signal
The separation of molecular scattering signal detects, and incides after 1/4 slide through the 532nm wavelength P polarization signal of polarization spectroscope 7
On confocal Fabry Perot filter 13, the aerosol scattering signal of centre frequency annex about 1GHz bandwidth and atmospheric molecule scatter
Signal is received by photodetector d15 after passing through this filter, and the atmospheric molecule scattered signal outside 1GHz bandwidth is by confocal method cloth
In Perot 13 reflect, after again passing by 1/4 slide, photodetector c9 is reflexed to by polarization spectroscope 7.
Frequency Locking system is realized confocal Fabry Perot filter 13 centre wavelength and the transmitting of single-frequency polarization laser is swashed
The locking of optical wavelength.Seed laser transmitting 1064nm continuous wave laser a part through optical fiber output, through frequency modulator
Confocal Fabry Perot filter is entered, this frequency modulator is made up of two acousto-optic modulators (AOM), acousto-optic modulator after 10
1 frequency modulation(PFM) realizing 80MHz, acousto-optic modulator 2 removes the carrier deviation of acousto-optic modulator 1 generation, compensates altogether simultaneously
The center frequency difference that burnt Fabry Perot filter 13 passes through to 1064nm wavelength and 532nm wavelength.Using frequency modulator with
Carry out the frequency scanning of ± 80MHz, by photoelectricity after the transmission of confocal Fabry Perot filter 13 centered on seed laser wavelength
Detector e records light intensity during different frequency, and the corresponding wavelength in analysis light intensity sequence signal maximizing position, by this ripple
The long difference signal with seed laser wavelength realizes confocal Fabry Perot filter 13 center is passed through with the feedback control of wavelength.
Confocal Fabry Perot filter 13 is simultaneously achieved when locking 1064nm seed laser wavelength and receives laser signal to 532nm
Centre wavelength locks.
Photodetector b8, photodetector c9, photodetector d15 are PMT detector, are operated in photon meter digital-to-analogue
Formula；Photodetector a5 detects for APD, and photodetector e16 is PIN detector, and this two kinds of detector signals adopt mould
Plan mode.
Photodetector c9 and photodetector d15 is used for 532nm wavelength high spectral resolution and detects, and 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 realizing aerosol polarization coefficient with photodetector b8.
Claims (9)
1. a kind of dual wavelength polarization high spectral resolution laser radar apparatus are it is characterised in that include：Laser transmitting system, optics connect
Receipts system data processing unit；
Laser transmitting system launches single-frequency polarized pulses laser in tested air, after optical receiving system receives tested air
To scattered light, carry out color separation processing afterwards successively, polarization spectro is processed, ultra-narrow bandwidth filter is processed and opto-electronic conversion, 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 polarization EO-1 hyperion laser radar signal.
2. a kind of dual wavelength polarization high spectral resolution laser radar apparatus according to claim 1 it is characterised in that：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 instrument；
Seed laser launches single-frequency laser, and the single-frequency laser that seed laser is launched is carried out shaping amplification by pulse laser,
Output dual wavelength pure-tone pulse laser, then reduce the angle of divergence of described pure-tone pulse laser through beam expanding lens, pure-tone pulse is swashed
Light is transmitted in tested air.
3. a kind of dual wavelength polarization high spectral resolution laser radar apparatus according to claim 2 it is characterised in that：Described
The single-frequency laser of seed laser transmitting is the single-frequency laser of wavelength 1064nm.
4. a kind of dual wavelength polarization high spectral resolution laser radar apparatus according to claim 2 it is characterised in that：Described
The dual wavelength pure-tone pulse laser of output is the pure-tone pulse laser of wavelength 1064nm and the pure-tone pulse laser of wavelength 532nm.
5. a kind of dual wavelength polarization high spectral resolution laser radar apparatus according to claim 1 it is characterised in that：Described
Optical receiving system includes telescope, the first dichronic mirror, the second dichronic mirror, ambient light filter, polarization spectroscope, 1/4 slide, conjunction
Shu Jing, confocal Fabry Perot filter, frequency modulator, the first photodetector, the second photodetector, the 3rd smooth electrical resistivity survey
Survey device, the 4th photodetector and the 5th photodetector；
Telescope receives the rear orientation light of tested air, carries out color separation by the first dichronic mirror, the wavelength of generation is
The light of 1064nm sends into the first photodetector, and the light of wavelength 532nm, after ambient light filter wiping out background light, enters polarization
Spectroscope carries out light splitting, and a road is sent into the second photodetector and detected, and enters and close bundle after separately leading up to 1/4 slide
Mirror, the single-frequency laser from seed laser is modulated by frequency modulator, is re-fed into light combination mirror, and light combination mirror will enter into it
In two-way light carry out close bundle, be re-fed into confocal Fabry Perot filter, confocal Fabry Perot filter will input light
Signal carries out aerosol scattering signal and the separation of atmospheric molecule scattered signal detects, the reflection of confocal Fabry Perot filter
Light is reflected into the 3rd photodetector again through after 1/4 slide by polarization spectroscope, meanwhile, aerosol scattering signal and
Single-frequency laser after modulation carries out color separation through after confocal Fabry Perot filter by the second dichronic mirror, and aerosol scattering is believed
Number received by the 4th photodetector, the single-frequency laser after modulation receives by the 5th photodetector, five photodetectors
Output electric signal is sent into data processing unit and is carried out data processing.
6. a kind of dual wavelength polarization high spectral resolution laser radar apparatus according to claim 5 it is characterised in that：Described
Confocal Fabry Perot filter adopts confocal curved surface chamber mode, and curved surface chamber radius of curvature is 1cm, is less than 1GHz through bandwidth.
7. a kind of dual wavelength polarization high spectral resolution laser radar apparatus according to claim 5 it is characterised in that：Described
Telescope adopts Cassegrain telescope, bore 1m, and the angle of visual field is 1 °.
8. a kind of dual wavelength polarization high spectral resolution laser radar apparatus according to claim 5 it is characterised in that：Described
Ambient light filter, by the way of interferometric filter and Fabry Perot etalon are combined, is 10GHz through laser bandwidth.
9. a kind of dual wavelength polarization high spectral resolution laser radar apparatus according to claim 1 it is characterised in that：Seed
Laser instrument, frequency modulator and the cooperation of the 5th photodetector realize confocal Fabry Perot filter center wavelength to single-frequency
Polarization laser launches the locking of optical maser wavelength, specially：
The single-frequency laser of seed laser transmitting, enters confocal Fabry Perot filter, using frequency after frequency modulator
Modulator is performed a scan centered on single-frequency laser wavelength, by light intensity during the 5th photodetectors register different frequency,
The corresponding wavelength in analysis light intensity sequence signal maximizing position, exports single-frequency laser by this wavelength with seed laser
The difference signal of wavelength realizes confocal Fabry Perot filter center is passed through with the feedback control of wavelength, thus realizing inclined to single-frequency
The locking of optical maser wavelength launched by the laser instrument that shakes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610966247.8A CN106443710B (en) | 2016-11-04 | 2016-11-04 | A kind of dual wavelength polarization high spectral resolution laser radar apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610966247.8A CN106443710B (en) | 2016-11-04 | 2016-11-04 | A kind of dual wavelength polarization high spectral resolution laser radar apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106443710A true CN106443710A (en) | 2017-02-22 |
| CN106443710B CN106443710B (en) | 2018-08-31 |
Family
ID=58179369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610966247.8A Active CN106443710B (en) | 2016-11-04 | 2016-11-04 | A kind of dual wavelength polarization high spectral resolution laser radar apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106443710B (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832474A (en) * | 2018-07-02 | 2018-11-16 | 北京理工大学 | A method of realizing radio frequency strength-modulated pulse laser |
| CN108844865A (en) * | 2018-04-20 | 2018-11-20 | 清华大学深圳研究生院 | A kind of method and device of dual wavelength polarized light scatter measurement particulate matter |
| CN109150315A (en) * | 2018-10-30 | 2019-01-04 | 宁波光舟通信技术有限公司 | Transmission method, the apparatus and system of Communication ray |
| CN109187365A (en) * | 2018-08-22 | 2019-01-11 | 中国科学院上海光学精密机械研究所 | Ocean profile dual wavelength polarization optics parameter estimator instrument |
| CN109257095A (en) * | 2018-10-30 | 2019-01-22 | 宁波光舟通信技术有限公司 | The transmission method and device of Communication ray |
| WO2019033279A1 (en) * | 2017-08-14 | 2019-02-21 | 杭州欧镭激光技术有限公司 | High-speed laser distance measuring device |
| CN109391330A (en) * | 2018-11-30 | 2019-02-26 | 宁波光舟通信技术有限公司 | Signal transmit-receive method, the apparatus and system of airborne receive-transmit system |
| CN109560869A (en) * | 2018-11-30 | 2019-04-02 | 宁波光舟通信技术有限公司 | Signal acceptance method, the apparatus and system of airborne reception system |
| CN109560874A (en) * | 2018-11-30 | 2019-04-02 | 宁波光舟通信技术有限公司 | Signal transmitting method, the apparatus and system of launched by airplane system |
| CN109946710A (en) * | 2019-03-29 | 2019-06-28 | 中国科学院上海技术物理研究所 | A kind of more polarized laser imaging devices of dual wavelength |
| WO2019239855A1 (en) * | 2018-06-13 | 2019-12-19 | ソニー株式会社 | Environment measurement device, information processing device, information processing system, information processing method, and program |
| CN111929254A (en) * | 2020-08-05 | 2020-11-13 | 广东技术师范大学 | Multi-band hyperspectral fusion crop nutrient deficiency analysis method, device and equipment |
| CN112180393A (en) * | 2020-08-21 | 2021-01-05 | 浙江大学 | Dual-wavelength FWMI spectral frequency discriminator and adjusting method thereof |
| CN112415491A (en) * | 2020-12-16 | 2021-02-26 | 北京遥测技术研究所 | Confocal laser frequency discriminator for hyperspectral laser radar |
| CN112558041A (en) * | 2020-12-23 | 2021-03-26 | 北京遥测技术研究所 | Satellite-borne flat relay optical system |
| CN114577692A (en) * | 2022-04-21 | 2022-06-03 | 亿慧云智能科技（深圳）股份有限公司 | Intelligent negative ion concentration detection device and detection method |
| CN116430365A (en) * | 2023-03-10 | 2023-07-14 | 中国科学院国家空间科学中心 | System and method for monitoring laser radar detection wavelength in real time based on echo signals |
| CN117169855A (en) * | 2023-10-24 | 2023-12-05 | 齐鲁空天信息研究院 | Dual wavelength laser radar device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308926A (en) * | 2013-06-18 | 2013-09-18 | 浙江大学 | Laser radar set with high spectral resolution |
| CN106019312A (en) * | 2016-08-04 | 2016-10-12 | 浙江大学 | Multi-longitudinal-mode high-spectral-resolution lidar based on interference spectrum frequency detector |
-
2016
- 2016-11-04 CN CN201610966247.8A patent/CN106443710B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308926A (en) * | 2013-06-18 | 2013-09-18 | 浙江大学 | Laser radar set with high spectral resolution |
| CN106019312A (en) * | 2016-08-04 | 2016-10-12 | 浙江大学 | Multi-longitudinal-mode high-spectral-resolution lidar based on interference spectrum frequency detector |
Non-Patent Citations (2)
| Title |
|---|
| 伯广宇 等: "探测云和气溶胶的机载双波长偏振激光雷达", 《中国激光》 * |
| 杨海菁 等: "基于共焦法布里-珀罗腔的无调制激光频率锁定", 《中国激光》 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019033279A1 (en) * | 2017-08-14 | 2019-02-21 | 杭州欧镭激光技术有限公司 | High-speed laser distance measuring device |
| US11681018B2 (en) | 2017-08-14 | 2023-06-20 | Hangzhou Ole-Systems Co., Ltd. | High-speed laser distance measuring device |
| CN108844865A (en) * | 2018-04-20 | 2018-11-20 | 清华大学深圳研究生院 | A kind of method and device of dual wavelength polarized light scatter measurement particulate matter |
| WO2019239855A1 (en) * | 2018-06-13 | 2019-12-19 | ソニー株式会社 | Environment measurement device, information processing device, information processing system, information processing method, and program |
| CN108832474A (en) * | 2018-07-02 | 2018-11-16 | 北京理工大学 | A method of realizing radio frequency strength-modulated pulse laser |
| CN109187365A (en) * | 2018-08-22 | 2019-01-11 | 中国科学院上海光学精密机械研究所 | Ocean profile dual wavelength polarization optics parameter estimator instrument |
| CN109150315A (en) * | 2018-10-30 | 2019-01-04 | 宁波光舟通信技术有限公司 | Transmission method, the apparatus and system of Communication ray |
| CN109257095A (en) * | 2018-10-30 | 2019-01-22 | 宁波光舟通信技术有限公司 | The transmission method and device of Communication ray |
| CN109391330A (en) * | 2018-11-30 | 2019-02-26 | 宁波光舟通信技术有限公司 | Signal transmit-receive method, the apparatus and system of airborne receive-transmit system |
| CN109560869A (en) * | 2018-11-30 | 2019-04-02 | 宁波光舟通信技术有限公司 | Signal acceptance method, the apparatus and system of airborne reception system |
| CN109560874A (en) * | 2018-11-30 | 2019-04-02 | 宁波光舟通信技术有限公司 | Signal transmitting method, the apparatus and system of launched by airplane system |
| CN109946710A (en) * | 2019-03-29 | 2019-06-28 | 中国科学院上海技术物理研究所 | A kind of more polarized laser imaging devices of dual wavelength |
| CN109946710B (en) * | 2019-03-29 | 2023-12-26 | 中国科学院上海技术物理研究所 | Dual-wavelength multi-polarization laser imaging device |
| CN111929254A (en) * | 2020-08-05 | 2020-11-13 | 广东技术师范大学 | Multi-band hyperspectral fusion crop nutrient deficiency analysis method, device and equipment |
| CN112180393A (en) * | 2020-08-21 | 2021-01-05 | 浙江大学 | Dual-wavelength FWMI spectral frequency discriminator and adjusting method thereof |
| CN112415491A (en) * | 2020-12-16 | 2021-02-26 | 北京遥测技术研究所 | Confocal laser frequency discriminator for hyperspectral laser radar |
| CN112558041B (en) * | 2020-12-23 | 2023-04-28 | 北京遥测技术研究所 | Satellite-borne flat relay optical system |
| CN112558041A (en) * | 2020-12-23 | 2021-03-26 | 北京遥测技术研究所 | Satellite-borne flat relay optical system |
| CN114577692A (en) * | 2022-04-21 | 2022-06-03 | 亿慧云智能科技（深圳）股份有限公司 | Intelligent negative ion concentration detection device and detection method |
| CN116430365A (en) * | 2023-03-10 | 2023-07-14 | 中国科学院国家空间科学中心 | System and method for monitoring laser radar detection wavelength in real time based on echo signals |
| CN116430365B (en) * | 2023-03-10 | 2023-10-24 | 中国科学院国家空间科学中心 | System and method for monitoring laser radar detection wavelength in real time based on echo signals |
| CN117169855A (en) * | 2023-10-24 | 2023-12-05 | 齐鲁空天信息研究院 | Dual wavelength laser radar device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106443710B (en) | 2018-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106443710B (en) | A kind of dual wavelength polarization high spectral resolution laser radar apparatus | |
| CN105408764B (en) | Coaxially directly detect LIDAR system | |
| CN109143263B (en) | Mixed type wind measurement laser radar | |
| US5450125A (en) | Spectrally dispersive imaging lidar system | |
| CN103308926B (en) | Laser radar set with high spectral resolution | |
| EP2817658B1 (en) | Heterodyne detection system and method | |
| WO2020063073A1 (en) | Laser radar system apparatus for multi-wavelength measurement of atmospheric carbon dioxide concentration and vertical aerosol profile | |
| AU2009266432B2 (en) | Interferometric distance measuring method with spectrally separable double chirp and device | |
| CN108303706B (en) | Aerosol optical parameter detection method and hyperspectral laser radar detection system | |
| CN104808193B (en) | F P etalon Rayleigh scattering Doppler's frequency discrimination devices based on unpolarized Amici prism | |
| CN100495070C (en) | Microwave windfinding laser radar apparatus | |
| CN207882443U (en) | A kind of EO-1 hyperion Airborne Lidar examining system | |
| CN107688187B (en) | Target detection laser radar based on spatial wavelength coding | |
| CN110082778A (en) | Coherent wind laser radar based on single photon detection | |
| US10794998B2 (en) | Diode laser based high spectral resolution lidar | |
| CN108717194A (en) | One species complex Doppler anemometry laser radar | |
| CN1641377A (en) | Incoherent laser windfinding method and laser radar | |
| CN113885047A (en) | Dual-polarization high spectral resolution laser radar system based on optical coherence technology | |
| EP1669730A2 (en) | Heterodyne-based optical spectrum analysis using data clock sampling | |
| CN103809167A (en) | Device and method for locking resonant frequency of FP interferometric spectrum filter | |
| US7417744B2 (en) | Coherent hybrid electromagnetic field imaging | |
| CN103809166A (en) | Resonant frequency locking device and method for Michelson interference type spectrum filter | |
| CN110456383B (en) | Molecular scattering coherent laser radar system | |
| Cherniak et al. | Compact and inexpensive terahertz system driven by monolithically integrated commercial light sources | |
| CN105785388A (en) | Virtually imaged phased array-based water body Brillouin scattering and elastic scattering lidar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |