CN106199559A - Atmospheric sounding wind speed and the coherent laser radar of depolarization ratio while of a kind of - Google Patents
Atmospheric sounding wind speed and the coherent laser radar of depolarization ratio while of a kind of Download PDFInfo
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- CN106199559A CN106199559A CN201610515441.4A CN201610515441A CN106199559A CN 106199559 A CN106199559 A CN 106199559A CN 201610515441 A CN201610515441 A CN 201610515441A CN 106199559 A CN106199559 A CN 106199559A
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- 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
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- 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
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- 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
- G01S7/4816—Constructional features, e.g. arrangements of optical elements of receivers alone
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- 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
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- Computer Networks & Wireless Communication (AREA)
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Atmospheric sounding wind speed and the coherent laser radar of depolarization ratio while of the invention discloses a kind of, it specifically includes that light source emitting module (L), polarization frequency mixing module (S, P) and signal processing module 15.By polarizing the polarization beam apparatus in frequency mixing module (S, P), echo-signal is divided into S-polarization and P polarization light, by quarter-wave plate, inclined for line local oscillator light is become rotatory polarization, re-use polarization beam apparatus and rotatory polarization is divided into S-polarization and P polarization light, carry out beat frequency with the flashlight of corresponding polarization state respectively.Scheme disclosed by the invention can improve the echo-signal utilization rate of coherent wind laser radar, improves the performance of coherent wind laser radar；By measuring the signal of different polarization states, it is achieved the measurement of aerosol depolarization ratio, it is achieved the coherent wind laser radar detection to aerosol situation.
Description
Technical field
The present invention relates to laser radar technique field, atmospheric sounding wind speed and the phase of depolarization ratio while of particularly relating to a kind of
Dry laser radar.
Background technology
Accurate atmospheric wind is measured detection atmospheric pollution, obtains military environments information, improves aerospace safety,
Improve weather forecast accuracy, improve climate model etc. and be significant.Anemometry laser radar is effective hands of Wind field measurement
Section, is divided into direct detection Doppler lidar for wind measurement and coherent detection anemometry laser radar.Direct detection Doppler lidar for wind measurement makes to use up
Learn descriminator, Doppler shift information is converted into the relative change of energy, it is achieved the measurement of atmospheric wind；Coherent detection surveys wind
Laser radar realizes the measurement of atmospheric wind by the relevant beat frequency of Received Signal Yu local oscillator laser.Traditional coherent is surveyed wind and is swashed
It is υ that optical radar basic structure such as Fig. 1: continuous-wave laser produces mid frequency0Line polarized light, after light splitting piece, be divided into signal
Light and local oscillator light, flashlight is modulated to pulsed light through acousto-optic modulator (AOM), and produces υMFrequency displacement, then carried out by amplifier
Power amplification, by telescope outgoing after circulator.If the Doppler frequency shift that pulsed light is produced by wind field is υd, then echo-signal
Mid frequency is υ0+υM+υd, it is υ that the beat signal of echo-signal and local oscillator light is converted to frequency through photodetectorM+υd
The IF signal of telecommunication, more acquired card sampling and subsequent conditioning circuit Data Management Analysis obtain wind field information.
Polarization lidar, can be with the linear depolarization ratio of inverting by measuring the echo-signal of different linear polarization.Depolarization
Ratio is relevant to atmospheric aerosol composition.In the less dry clean air of irregular particle thing content, Depolarization Ratio, close to 0, is containing
The ocean surface that more salty burl is brilliant, it can significantly rise, and when air severe contamination and sandstorm, its value is 0.2-
0.3, up to 0.4 under extreme case.Therefore by measuring Depolarization Ratio, it may be determined that atmospheric aerosol kind and judge atmospheric pollution
Situation.
In direct detection Doppler lidar for wind measurement field, deliver utilization polarization from Scholand and Sassen in 1971 and swashed
After optical radar carries out the article of detection study to cloud, direct detection polarization lidar has had more than 40 year for Atmospheric Survey
History.In the last few years, in order to adaptation zone and global climate and environmental change to atmospheric aerosol three-dimensional spatial distribution and time
Between develop the demand of data, the whole world successively establish zonal ground atmospheric aerosol Laser Radar Observation net (as
EARLINET, AD-Net etc.), global atmosphere aerosol LIDAR observational network (GALION) and satellite-bone laser radar
(CALIPSO).According to 2008, World Meteorological Organization (WMO) the GAW Report No.178 file issued explicitly points out,
Mie scattering laser radar, polarization lidar and multi-wavelength Raman laser radar may be used for the inverting of aerosol kind.Its
In, polarization Mie scattering laser radar has had ripe commercially produced product, such as international micro-pulse lidar net
(MPLNET), Asian Dust net (AD-Net) and satellite-bone laser radar CALIOP, the measurement of stratospheric aerosol is main
Rely on Mie scattering laser radar.
In coherent detection anemometry laser radar field, it is little that the all-fiber coherent anemometry laser radar of 1.5 μm has volume, high
Certainty of measurement, the advantage such as high time and high spatial resolution, is the fields of falling over each other development, countries in the world.Mitsubishi electromechanics is limited
Company reports the coherent wind laser radar of First 1.5 μm in the world.LEOSPHERE company of France produces commercially available
WINDCUBE coherent wind laser radar, Air France Group space research center (ONERA) independent development 1.5 mu m coherents survey wind
Laser radar, Britain SgurrEnergy is proposed the Galion series coherent wind laser thunder that collocation wind power plant uses
Reaching, QinetiQ company of Britain have developed ZephIR series 1.548 μm pulse coherences based on optical fiber technology and surveys wind laser thunder
Reaching, American National Center for Atmospheric Research (NCAR) has airborne coherent wind laser radar (LAMS) based on continuous laser.
The relevant survey using 1.5 mum wavelength continuous-wave lasers was built in 2010 by domestic Yao Yong seminar of Harbin Institute of Technology
Wind laser radar.Chinese Marine University reported its 1.55 μm phases utilized for wind energy research and development developed in 2014
Dry anemometry laser radar.Insititute 27, China Electronics Technology Group Co., Ltd. reports employing 1.5 μm continuous waves for 2010
The laser radar of homodyne frequency, and the coherent wind laser radar of a set of all-fiber was reported in 2013.In the Chinese Academy of Sciences
Sea optical precision optical machinery institute have developed the coherent wind laser radar of 1.064 μm in 2012, reported again in 2014
The 1.54 mu m all-fiber coherent anemometry laser radars for the detection of the PBL wind profile.But, above traditional coherent surveys wind laser
Radar all can only measure the single polarization state echo-signal consistent with local oscillator polarization state, it is impossible to measures air depolarization ratio, because of
This current international and national does not the most use the report that coherent wind lidar measurement air depolarization ratio is studied.Traditional coherent
Anemometry laser radar there is problems in that
1) in coherent wind laser radar system, one of essential condition of relevant beat frequency is in for flashlight and local oscillator light
Same polarization state, but due to aerosol depolarization effect, echo-signal is no longer line polarized light, thus cause traditional coherent to survey wind
The polarization state of the part echo signal of laser radar is different from local oscillator laser polarization state, so causing the loss of echo-signal.
2) because depolarization ratio is relevant with aerocolloidal situation, so traditional coherent anemometry laser radar signal cannot reflect
Aerosol situation.
Summary of the invention
Atmospheric sounding wind speed and the coherent laser radar of depolarization ratio, the Ke Yiti while of it is an object of the invention to provide a kind of
The echo-signal utilization rate of high coherent wind laser radar, improves the performance of coherent wind laser radar；By measuring difference
The signal of polarization state, it is achieved the measurement of aerosol depolarization ratio, it is achieved the coherent wind laser radar detection to aerosol situation.
It is an object of the invention to be achieved through the following technical solutions:
Atmospheric sounding wind speed and the coherent laser radar of depolarization ratio while of a kind of, including: signal generator 1, continuous wave
Laser instrument 2, light splitting piece 3, acousto-optic modulator AOM 4, amplifier 5, three port circulator 6, transmitting-receiving telescope 7, polarization beam apparatus A
8, reflecting mirror A 9, quarter-wave plate 10, polarization beam apparatus B 11, reflecting mirror B12, balanced detector A13, balanced detector B
14 and capture card and data processing module 15；Wherein:
Described signal generator 1 connects the triggering port of continuous-wave laser 2 and AOM4, and continuous-wave laser 2 light-emitting window connects
Light splitting piece 3, laser is divided into flashlight and local oscillator light by light splitting piece 3；Flashlight therein connects the light inlet of AOM 4, and local oscillator light connects
Quarter-wave plate 10；
The light-emitting window of AOM 4 connects a port of three port circulators 6 by amplifier 5, and the b port of three port circulators 6 connects
Transmitting-receiving telescope 7, c port meets polarization beam apparatus A8, and polarization beam apparatus A8 light-emitting window accesses balanced detector A 13, and through anti-
Penetrate mirror A9 and meet balanced detector B 14；
Quarter-wave plate 10 exit portal accesses polarization beam apparatus B 11, polarization beam apparatus B 11 light-emitting window and accesses balance spy
Survey device A 13, and be reflected mirror B 12 balanced detector B 14；
The output termination capture card of balanced detector A 13 and balanced detector B 14 and data processing module 15.
Work process includes:
Signal generator 1 controls continuous-wave laser 2 and goes out light, is modulated AOM 4 simultaneously；Continuous-wave laser 2 goes out
The linear polarization continuous laser penetrated, after light splitting piece 3, is divided into flashlight and local oscillator light；
Flashlight therein enters AOM 4 and is modulated, and amplified device 5 is amplified, through a end of annular beam splitter 6
Mouth enters transmitting-receiving telescope 7 and shines air；Local oscillator light therein, after quarter-wave plate 10, line polarized light transfers circle to partially
Shake light, and circularly polarized light, after polarization beam apparatus B 11, is divided into S-polarization local oscillator light and P polarization local oscillator light, and S-polarization local oscillator light is through anti-
Penetrating mirror B 12 to input to balanced detector A 13, P polarization local oscillator light is directly inputted into balanced detector B 14；
The backscatter signal that flashlight after amplification produces after atmospheric action receives, from three ends through transmitting-receiving telescope 7
The b mouth of mouth circulator 6 is incident, through c mouth outgoing, due to the aerocolloidal irregularly shaped depolarization effect caused, echo-signal
Including different polarization states, after polarization beam apparatus A 8 beam splitting, S-polarization flashlight direct balanced detector A 13, P polarization is believed
Number light is reflected mirror A 9 and inputs to balanced detector B 14；
By balanced detector A 13, the S-polarization flashlight of input is carried out beat frequency, by balanced detector with S-polarization local oscillator light
B14 carries out beat frequency to the P polarization flashlight of input with P polarization local oscillator light；
The result input of balanced detector A 13 and balanced detector B 14 is to capture card and signal processing module 15
Carry out process to go forward side by side sector-style field data inverting.
As seen from the above technical solution provided by the invention, use polarization beam apparatus A that Received Signal is divided into S
Polarization signal light and P polarization flashlight；Use quarter-wave plate, linear polarization local oscillator light is converted into circular polarization local oscillator light, and
S-polarization local oscillator light and P polarization local oscillator light is obtained by polarization beam apparatus B；And the local oscillator light of identical polarization state is connect with flashlight
Enter balanced detector to be mixed, relative to non-polarizing hybrid coherent wind laser radar, improve the utilization rate of echo-signal；
Additionally, by the signal intensity measuring different polarization states, aerocolloidal depolarization ratio can be measured, such that it is able to realize relevant survey
The detection to aerosol situation of the wind laser radar.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, required use in embodiment being described below
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for this
From the point of view of the those of ordinary skill in field, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
The schematic diagram of the traditional coherent anemometry laser radar that Fig. 1 provides for background of invention；
Fig. 2 for the embodiment of the present invention provide a kind of while atmospheric sounding wind speed and the coherent laser radar of depolarization ratio
Schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on this
Inventive embodiment, the every other enforcement that those of ordinary skill in the art are obtained under not making creative work premise
Example, broadly falls into protection scope of the present invention.
Fig. 2 for the embodiment of the present invention provide a kind of while atmospheric sounding wind speed and the coherent laser radar of depolarization ratio
Schematic diagram.It specifically includes that light source emitting module (L), polarization frequency mixing module (S, P) and signal processing module 15.By polarization
Echo-signal is divided into S-polarization and P polarization light by the polarization beam apparatus in frequency mixing module (S, P), by quarter-wave plate by line
Local oscillator light partially becomes rotatory polarization, re-uses polarization beam apparatus and rotatory polarization is divided into S-polarization and P polarization light, respectively with corresponding polarization
The flashlight of state carries out beat frequency.
Described light source emitting module (L) including: signal generator 1, continuous-wave laser 2, light splitting piece 3, acousto-optic modulation
Device (AOM) 4, amplifier 5, three port circulator 6, transmitting-receiving telescope 7；Described polarization frequency mixing module (S, P) including: polarization beam splitting
Device A8, reflecting mirror A9, quarter-wave plate 10, polarization beam apparatus B 11, reflecting mirror B 12, balanced detector A 13, balance are visited
Survey device B 14 and capture card；Wherein:
Described signal generator 1 connects the triggering port of continuous-wave laser 2 and AOM 4, and continuous-wave laser 2 light-emitting window connects
Light splitting piece 3, laser is divided into flashlight and local oscillator light by light splitting piece 3；Flashlight therein connects the light inlet of AOM 4, and local oscillator light connects
Quarter-wave plate 10；
The light-emitting window of AOM 4 connects a port of three port circulators 6 by amplifier 5, and the b port of three port circulators 6 connects
Transmitting-receiving telescope 7, c port meets polarization beam apparatus A 8, and polarization beam apparatus A8 light-emitting window accesses balanced detector A 13, Yi Jijing
Reflecting mirror A9 meets balanced detector B 14；
Quarter-wave plate 10 exit portal accesses polarization beam apparatus B 11, polarization beam apparatus B 11 light-emitting window and accesses balance spy
Survey device A 13, and be reflected mirror B 12 balanced detector B 14；
The output termination capture card of balanced detector A 13 and balanced detector B 14 and data processing module 15.
Based on said structure, this simultaneously the coherent laser radar of atmospheric sounding wind speed and depolarization ratio work process such as
Under:
Signal generator 1 controls continuous-wave laser 2 and goes out light, is modulated AOM 4 simultaneously；Continuous-wave laser 2 goes out
The linear polarization continuous laser penetrated, after light splitting piece 3, is divided into flashlight and local oscillator light；
Flashlight therein enters AOM 4 and is modulated, and amplified device 5 is amplified, through a end of annular beam splitter 6
Mouth enters transmitting-receiving telescope 7 and shines air；Local oscillator light therein, after quarter-wave plate 10, line polarized light transfers circle to partially
Shake light, and circularly polarized light, after polarization beam apparatus B 11, is divided into S-polarization local oscillator light and P polarization local oscillator light, and S-polarization local oscillator light is through anti-
Penetrating mirror B 12 to input to balanced detector A 13, P polarization local oscillator light is directly inputted into balanced detector B 14；
The backscatter signal that flashlight after amplification produces after atmospheric action receives, from three ends through transmitting-receiving telescope 7
The b mouth of mouth circulator 6 is incident, through c mouth outgoing, due to the aerocolloidal irregularly shaped depolarization effect caused, echo-signal
Including different polarization states, after polarization beam apparatus A 8 beam splitting, S-polarization flashlight direct balanced detector A 13, P polarization is believed
Number light is reflected mirror A 9 and inputs to balanced detector B 14；
By balanced detector A 13, the S-polarization flashlight of input is carried out beat frequency, by balanced detector with S-polarization local oscillator light
B14 carries out beat frequency to the P polarization flashlight of input with P polarization local oscillator light；
The result input of balanced detector A 13 and balanced detector B 14 is to capture card and signal processing module 15
Carry out process to go forward side by side sector-style field data inverting.
In the such scheme of the embodiment of the present invention, use polarization beam apparatus A that Received Signal is divided into S-polarization flashlight
With P polarization flashlight；Use quarter-wave plate, linear polarization local oscillator light is converted into circular polarization local oscillator light, and by polarization point
Bundle device B obtains S-polarization local oscillator light and P polarization local oscillator light；And the local oscillator light of identical polarization state is accessed balance detection with flashlight
Device is mixed, and relative to non-polarizing hybrid coherent wind laser radar, improves the utilization rate of echo-signal；Additionally, pass through
Measure the signal intensity of different polarization states, aerocolloidal depolarization ratio can be measured, such that it is able to realize coherent wind laser thunder
Reach the detection to aerosol situation.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be as the criterion.
Claims (2)
1. simultaneously atmospheric sounding wind speed and the coherent laser radar of depolarization ratio, it is characterised in that including: signal generator
(1), continuous-wave laser (2), light splitting piece (3), acousto-optic modulator AOM (4), amplifier (5), three port circulators (6), transmitting-receiving
Telescope (7), polarization beam apparatus A (8), reflecting mirror A (9), quarter-wave plate (10), polarization beam apparatus B (11), reflecting mirror B
(12), balanced detector A (13), balanced detector B (14) and capture card and data processing module (15)；Wherein:
Described signal generator (1) connects continuous-wave laser (2) and the triggering port of AOM (4), and continuous-wave laser (2) goes out light
Mouth connects light splitting piece (3), and laser is divided into flashlight and local oscillator light by light splitting piece (3)；Flashlight therein connects the light inlet of AOM (4),
Local oscillator light connects quarter-wave plate (10)；
The light-emitting window of AOM (4) connects a port of three port circulators (6), the b end of three port circulators (6) by amplifier (5)
Mouth receives sends out a telescope (7), and c port meets polarization beam apparatus A (8), and polarization beam apparatus A (8) light-emitting window accesses balanced detector A
, and be reflected mirror A (9) and meet balanced detector B (14) (13)；
Quarter-wave plate (10) exit portal accesses polarization beam apparatus B (11), and polarization beam apparatus B (11) light-emitting window accesses balance and visits
Survey device A (13), and be reflected mirror B (12) balanced detector B (14)；
The output termination capture card of balanced detector A (13) and balanced detector B (14) and data processing module (15).
The most according to claim 1 a kind of while atmospheric sounding wind speed and the coherent laser radar of depolarization ratio, its feature
Being, work process includes:
Signal generator (1) controls continuous-wave laser (2) and goes out light, is modulated AOM (4) simultaneously；Continuous-wave laser (2)
The linear polarization continuous laser of outgoing, after light splitting piece (3), is divided into flashlight and local oscillator light；
Flashlight therein enters AOM (4) and is modulated, and amplified device (5) is amplified, through a end of annular beam splitter (6)
Mouth enters transmitting-receiving telescope (7) and shines air；Local oscillator light therein, after quarter-wave plate (10), line polarized light transfers to
Circularly polarized light, circularly polarized light, after polarization beam apparatus B (11), is divided into S-polarization local oscillator light and P polarization local oscillator light, S-polarization local oscillator light
Being reflected mirror B (12) to input to balanced detector A (13), P polarization local oscillator light is directly inputted into balanced detector B (14)；
The backscatter signal that flashlight after amplification produces after atmospheric action receives through transmitting-receiving telescope (7), from three ports
The b mouth of circulator (6) is incident, through c mouth outgoing, due to the aerocolloidal irregularly shaped depolarization effect caused, echo-signal
Include different polarization states, after polarization beam apparatus A (8) beam splitting, S-polarization flashlight direct balanced detector A (13), P polarization
Flashlight is reflected mirror A (9) and inputs to balanced detector B (14)；
By balanced detector A (13), the S-polarization flashlight of input is carried out beat frequency, by balanced detector B with S-polarization local oscillator light
(14) P polarization flashlight and P polarization local oscillator light to input carry out beat frequency；
The result input of balanced detector A (13) and balanced detector B (14) is to capture card and signal processing module (15)
Carry out process to go forward side by side sector-style field data inverting.
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| CN107894587A (en) * | 2017-12-04 | 2018-04-10 | 电子科技大学 | A kind of pulse laser homodyne coherent detection device based on light lock phase |
| CN109143263B (en) * | 2018-07-05 | 2022-11-01 | 夏和娣 | Mixed type wind measurement laser radar |
| CN109143263A (en) * | 2018-07-05 | 2019-01-04 | 合肥菲涅尔光电科技有限公司 | A kind of mixed type anemometry laser radar |
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| CN113960631B (en) * | 2021-12-22 | 2022-04-08 | 青岛镭测创芯科技有限公司 | Radar system |
| CN113960631A (en) * | 2021-12-22 | 2022-01-21 | 青岛镭测创芯科技有限公司 | Radar system |
| CN114637030A (en) * | 2022-05-18 | 2022-06-17 | 南京信息工程大学 | Dual-polarization receiving gas detection laser radar and gas detection method |
| CN114994709A (en) * | 2022-08-02 | 2022-09-02 | 南京信息工程大学 | Coherent laser radar based on dual-polarization interference |
| CN114994709B (en) * | 2022-08-02 | 2022-10-28 | 南京信息工程大学 | Coherent laser radar based on dual-polarization interference |
| CN116068584A (en) * | 2023-03-13 | 2023-05-05 | 武汉聚合光子技术有限公司 | Non-blind area coherent laser radar |
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