CN104865580A - Space-borne laser radar detection system for detecting marine atmosphere parameters - Google Patents
Space-borne laser radar detection system for detecting marine atmosphere parameters Download PDFInfo
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- CN104865580A CN104865580A CN201510259696.4A CN201510259696A CN104865580A CN 104865580 A CN104865580 A CN 104865580A CN 201510259696 A CN201510259696 A CN 201510259696A CN 104865580 A CN104865580 A CN 104865580A
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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
- G01S7/483—Details of pulse systems
- G01S7/484—Transmitters
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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
Abstract
A space-borne laser radar detection system for detecting marine atmosphere parameters comprises a tunable laser subsystem, a reception optical subsystem, a signal processing subsystem, a control and data processing subsystem, wherein the tunable laser subsystem generates 935nm, 761nm laser and irradiates the laser to the atmosphere above a sea, the reception optical subsystem separates two optical signals of different wavelengths from backward scattering signals after the laser is irradiated to the atmosphere, the signal processing subsystem carries out photoelectric conversion, amplification and analog-to-digital conversion on optical signals, and the control and data processing subsystem calculates marine atmosphere temperature, humidity and density according to the digital signals sent by the signal processing subsystem. Compared with the prior art, the space-borne laser radar detection system can detect atmospheric temperature, humidity, density parameter distribution of the atmosphere above a sea, and plays an important role for researching meteorological environment above a sea, climate change, land-ocean air steam transmission, atmospheric flow and other natural science rules and improving offshore work and sea-crossing flight.
Description
Technical field
The present invention relates to marine atmosphere temperature, humidity, density active remote sensing field of detecting, particularly a kind of spaceborne marine atmosphere parameter Airborne Lidar examining system.
Background technology
Ocean area takes up an area about 71% of ball total surface area, obtain with grasp the atmospheric parameter in overhead, ocean and climatic environment for the understanding improving naval air environment with study very important.The major parameter of naval air environment comprises temperature, humidity, density etc., these parameters are for science natural laws such as research overhead, ocean weather environment, climatic variation, land-marine empty water vapor transmission, air motions, and it is all significant to improve offshore operation and overhead, ocean aircraft flight etc.
Conventional atmospheric exploration remote sensing equipment comprises passive remote sensing equipment and ground laser radar, but passive remote sensing equipment cannot carry out round-the-clock daytime measurement, and detection accuracy is low, cannot obtain the three-dimensional information of air.And ground laser radar is by the restriction of investigative range, detected with high accuracy cannot be carried out to the air comprised in the global range in overhead, ocean.
Summary of the invention
The technical matters that the present invention solves is: overcome the deficiencies in the prior art, provides that a kind of detection accuracy is high, scope is large and can detects the spaceborne marine atmosphere parameter Airborne Lidar examining system of the atmospheric temperature in overhead, ocean, humidity, density parameter distribution simultaneously.
Technical solution of the present invention is: a kind of spaceborne marine atmosphere parameter Airborne Lidar examining system, comprises tunable laser subsystem, receives optical subsystem, signal processing subsystem, control and data process subsystem, wherein
Control and data process subsystem, comprise control module and data processing module; Start-up command is delivered to tunable laser subsystem by control module, and electric signal enlargement factor, analog to digital conversion parameter are delivered to signal processing subsystem; The digital signal that data processing module Received signal strength processing subsystem sends, uses Difference Absorption algorithm to calculate the concentration of oxygen and steam in marine atmosphere, and then obtains the temperature of marine atmosphere, humidity and density according to the equation of gas state; Described analog to digital conversion parameter comprises analog to digital conversion sampling rate, analog to digital conversion quantization digit;
Tunable laser subsystem, comprises 935nm generating laser, 761nm generating laser; 935nm generating laser, receive control with the start-up command that sends of control module in data process subsystem after, generation live width is the laser of the 935nm of 1.0pm and exposes to the air in overhead, ocean; 761nm generating laser, receive control with the start-up command that sends of control module in data process subsystem after, generation live width is the laser of the 761nm of 1.0pm and exposes to the air in overhead, ocean;
Receive optical subsystem, comprise optical telescope, optical filtering beam splitting system; Optical telescope, the backscatter signal produced after the reception laser of 935nm and the laser of 761nm expose to the air in overhead, ocean, and deliver to optical filtering beam splitting system respectively; Optical filtering beam splitting system, isolates the light signal of 935nm wavelength and the light signal of 761nm wavelength, and delivers to signal processing subsystem respectively from the backscatter signal produced after the laser of 935nm and the laser of 761nm expose to air;
Signal processing subsystem, receives electric signal enlargement factor, analog to digital conversion parameter that control module sends; Opto-electronic conversion is carried out respectively after the light signal of 935nm wavelength that reception optical filtering beam splitting system sends and the light signal of 761nm wavelength, amplify according to electric signal enlargement factor after obtaining corresponding electric signal, then carry out analog to digital conversion according to analog to digital conversion parameter and obtain its digital signal corresponding respectively, digital signal is delivered to control and data process subsystem.
Described 935nm generating laser comprises the first injection seeded laser diode, a Nd:YAG pump unit, a Ti:SAPPIRE power oscillator, the first beam splitter prism, water vapor absorption pond, first injection seeded laser diode is after receiving the start-up command controlling to send with control module in data process subsystem, a Nd:YAG pump unit is driven to produce optical maser wavelength 935nm, the pulse laser of pulsewidth 500ns also delivers to a Ti:SAPPIRE power oscillator, regulate after one Ti:SAPPIRE power oscillator received pulse laser, obtaining wavelength is 935nm, pulse energy is 100mJ, pulsewidth is 500ns, impulse ejection is spaced apart 400 μ s, spectrum width is the pulse laser of 1pm, and enter water vapor absorption pond by the first beam splitter prism irradiation, transmission is there is after the received pulse laser of water vapor absorption pond, if this pulse laser light intensity transmitance is 70%-90%, then a Ti:SAPPIRE power oscillator just regulates the pulsed laser irradiation that obtains to the air in overhead, ocean, otherwise regenerate pulse laser until this pulse laser is the air exposing to overhead, ocean after 70%-90% by the light intensity transmitance in water vapor absorption pond.
Described 761nm generating laser comprises the second injection seeded laser diode, the 2nd Nd:YAG pump unit, the 2nd Ti:SAPPIRE power oscillator, the second beam splitter prism photograph, oxygen absorption pond, second injection seeded laser diode is after receiving the start-up command controlling to send with control module in data process subsystem, the 2nd Nd:YAG pump unit is driven to produce optical maser wavelength 761nm, the pulse laser of pulsewidth 500ns also delivers to the 2nd Ti:SAPPIRE power oscillator, regulate after 2nd Ti:SAPPIRE power oscillator received pulse laser, obtaining wavelength is 761nm, pulse energy is 100mJ, pulsewidth is 500ns, impulse ejection is spaced apart 400 μ s, spectrum width is the pulse laser of 1pm, and enter oxygen absorption pond by the second beam splitter prism irradiation, transmission is there is after the received pulse laser of oxygen absorption pond, if this pulse laser light intensity transmitance is 70%-90%, then the 2nd Ti:SAPPIRE power oscillator just regulates the pulsed laser irradiation that obtains to the air in overhead, ocean, otherwise regenerate pulse laser until this pulse laser is the air exposing to overhead, ocean after 70%-90% by the light intensity transmitance in oxygen absorption pond.
Described optical telescope bore is the coaxial type light path Cassegrain antenna structure altogether of 1.5m.
The mode that described optical filtering beam splitting system adopts narrow band pass filter and etalon to combine.
The present invention's advantage is compared with prior art:
(1) present system overcomes passive remote sensing equipment and cannot carry out round-the-clock daytime measurement and detection accuracy is low, can not obtain the deficiency of the three-dimensional information of air, ground laser radar, by the deficiency of the restriction of investigative range, can detect the atmospheric temperature in overhead, ocean, humidity, density parameter distribution simultaneously on a large scale;
(2) present system compared with prior art, laser differential absorption techniques is utilized to measure the characteristic gas such as oxygen and steam in marine atmosphere, and then measure according to the characteristic gas that the equation of gas state obtains the temperature of marine atmosphere, humidity and density, realize simple and convenient;
(3) present system compared with prior art, can the parameter such as temperature, humidity, density of Measuring Oceanic atmospheric environment on a large scale, for science natural laws such as research overhead, ocean weather environment, climatic variation, land-marine empty water vapor transmission, air motions and to improve offshore operation and overhead, ocean aircraft flight etc. all significant.
Accompanying drawing explanation
Fig. 1 is the present invention's spaceborne marine atmosphere parameter Airborne Lidar examining system;
Fig. 2 is present system Nd:YAG pumping ti sapphire laser schematic diagram;
Fig. 3 is present system 935nm pulse laser output scheme schematic diagram;
Fig. 4 is present system 761nm pulse laser output scheme schematic diagram;
Fig. 5 is present system optical spectroscopic receiving system schematic diagram.
Embodiment
The present invention proposes a kind of spaceborne marine atmosphere parameter Airborne Lidar examining system, and this laser radar system adopts Difference Absorption principle to measure the concentration of atmospheric oxygen and steam, the recycling equation of gas state, the temperature of inverting air, humidity and density.This laser radar system is made up of four parts, is tunable laser subsystem from left to right successively, receives optical subsystem, signal processing subsystem, control and data process subsystem.Tunable laser subsystem shoot laser under control of the control system, oxygen in laser and air and vapour molecule interact, receive the backscattering echo signal that optical subsystem receives air, through the operation such as amplification, filtering, digitizing of signal processing subsystem, data are sent to control and data process subsystem, carry out late time data process, obtain the temperature of marine atmosphere, humidity and density.Be illustrated in figure 1 spaceborne marine atmosphere temperature, humidity and density detection laser radar system composition diagram,
1, control and data process subsystem
Control and data process subsystem, comprise control module and data processing module; Data processing module be directly in be embedded to the program controlled with data process subsystem interface, adopt Difference Absorption algorithm to calculate the concentration of oxygen and steam in marine atmosphere, then be finally inversed by the temperature of marine atmosphere, humidity and density in conjunction with the equation of gas state.Control module comprises the control of tunable laser subsystem, photodetector controls, data acquisition module controls, and controls the switching on and shutting down of laser instrument, the enlargement factor of photodetector and the sampling rate of data collecting card and analog to digital conversion quantization digit.
Realize spaceborne marine atmosphere temperature, humidity, density detection laser radar system basic function be come by the top layer pattern of 2 in control system and 3 subpatterns.Wherein, 2 top layer patterns are ready mode (Standby) and mode of operation (Operation), and three subpatterns comprise wait (Wait), tuning (Tune) and data acquisition (Data).Workflow is: after system power-up, enters into preparation standby mode, and in this mode, Optical Maser System, Photodetection system etc. are in the temperature stabilization stage.After laser radar system receives operating instruction, contribute to operational mode state, at this moment modulator module starts the tuning work of scanning of wanted laser output wavelength, scanning is divided into coarse adjustment and accurate adjustment process, after this process completes, be transferred in signal processing subsystem, laser instrument starts Emission Lasers measuring-signal, synchronous signal processing subsystem receives according to preset parameter on laser echoed signal, amplify, filtering, analog to digital conversion, again digital signal is sent into and control and data process subsystem, control the inverting completing data with data process subsystem, after storing, laser instrument launches second pulse signal, carry out second and take turns work.
2, tunable laser subsystem
Tunable laser instrument is the subsystem be operated under dual wavelength double pulse modes, and wherein dual wavelength is 935nm and 761nm, and pulse energy is 100mJ, and pulsewidth is 500ns, and impulse ejection is spaced apart 400 μ s, and spectrum width is 1pm.The system that this adjustable laser is made up of as injection seeded as pumping driving source and single mode laser diode frequency multiplication Nd:YAG.935nm generating laser comprises the first injection seeded laser diode, a Nd:YAG pump module, a Ti:SAPPIRE power oscillator, the first beam splitter prism photograph, water vapor (H
2o) absorption cell, 761nm generating laser comprises the second injection seeded laser diode (LD), the 2nd Nd:YAG pump module, the 2nd Ti:SAPPIRE (Ti:Al
2o
3) power oscillator, the second beam splitter prism is according to, oxygen (O
2) absorption cell, wherein, 935nm generating laser and 761nm generating laser, in the laser radar system course of work, are work by receiving the instruction controlling to send with data process subsystem simultaneously.
1) Nd:YAG pump laser source
High power semiconductor array laser is as the pumping source of inner cavity frequency-doubling Nd:YAG laser instrument, and its inner structure as shown in Figure 2.Three groups of laser diode bar are arranged in around Nd:YAG rod symmetrically, can pumping active medium equably.Often organize the laser diode Bar bar that laser diode bar is 20W by 4 power to form, laser diode exports continuously, and maximum pump Pu power is 240W.Whole assembly (comprising laser diode and Nd:YAG rod) provides cooling by the chilled water flowed.
Producing wavelength by Nd:YAG laser crystal is the pulsed light of 1064nm.This pulse laser is first through light isolation module, and the characteristic of this light isolation module is the Laser Transmission only allowing particular propagation direction, avoids the back-propagating of 1064nm pulse laser to the damage of Nd:YAG crystal.Then, successively after amplification module 1, amplification module 2, mirror M 1, two times of frequency module CDA, producing single pulse energy is 1.4J, and repetition frequency is 5Hz, and wavelength is the laser signal of 532nm.This pulsed laser signal is as Ti:SAPPIRE (Ti:Al
2o
3) the input pump signal of power oscillator will be injected in power oscillator system.
2) Ti:SAPPIRE (Ti:Al
2o
3) power oscillator
In Fig. 3 and Fig. 4, Ti:SAPPIRE (Ti:Al
2o
3) power oscillator is a unstable resonator structure, the chamber of this resonator cavity is long is 1.5m.The element such as the plane mirror (HR) that this resonator cavity reflects outgoing mirror (GRM) by step, reflectivity is 97%, four layers of birefringent filter (BRF), holographic corner reflector (HRR), plane mirror (M), beam splitter (BS) forms.Ti:Al in resonator cavity
2o
3angular separation, crystal Guangzhou with nothing left with it, inclined-plane, crystal bar two ends is Brewster angle, and laser crystal length is 18mm.
3) the tuning control of optical maser wavelength
Ti:SAPPIRE (Ti:Al
2o
3) the meticulous adjustment of laser crystal output wavelength realizes by the output wavelength controlled as the laser diode of resonator cavity injection seeded.Concrete grammar is: laser diode exports 100mW laser continuously, and is about 1mW by the laser that high reflection mirror (HR) is injected in resonator cavity.Spectral width can control at 1.0pm by injection seeded technology, and wavelength stability can be controlled at ± about 0.25pm.
4) spectral purity and pulse control exporting
In Fig. 3 and Fig. 4, it is that the intensity in transmission of the water vapor container of 200m is than realizing that the spectral purity of tunable laser subsystem is irradiated to spread length by measurement laser firing pulses.Embodiment is: detect transmitted light intensity by photodiode, and namely the output wavelength of diode is locked on the some fixing absorption line of water vapor.Meanwhile, the temperature that exports of diode and current signal all can reflect the change of optical maser wavelength feature.When laser radar system works, by controlling diode external temperature and current signal, can realize being directed to the pulse of specific wavelength to the generation of laser signal.
First injection seeded laser diode is after receiving the start-up command controlling to send with control module in data process subsystem, a Nd:YAG pump unit is driven to produce optical maser wavelength 935nm, the pulse laser of pulsewidth 500ns also delivers to Ti:SAPPIRE power oscillator, regulate after one Ti:SAPPIRE power oscillator received pulse laser, obtaining wavelength is 935nm, pulse energy is 100mJ, pulsewidth is 500ns, impulse ejection is spaced apart 400 μ s, spectrum width is the pulse laser of 1pm, and be 90 (transmissions) by splitting ratio: the first beam splitter prism of 10 (reflections) irradiates and enters H
2o absorption cell, H
2transmission is there is after O absorption cell received pulse laser, if this pulse laser light intensity transmitance is 70%-90%, then a Ti:SAPPIRE power oscillator just regulates the pulsed laser irradiation that obtains to the air in overhead, ocean, otherwise regenerates pulse laser until this pulse laser passes through H
2the light intensity transmitance of O absorption cell is the air exposing to overhead, ocean after 70%-90%.
Second injection seeded laser diode is after receiving the start-up command controlling to send with control module in data process subsystem, the 2nd Nd:YAG pump unit is driven to produce optical maser wavelength 761nm, the pulse laser of pulsewidth 500ns also delivers to Ti:SAPPIRE power oscillator, regulate after 2nd Ti:SAPPIRE power oscillator received pulse laser, obtaining wavelength is 761nm, pulse energy is 100mJ, pulsewidth is 500ns, impulse ejection is spaced apart 400 μ s, spectrum width is the pulse laser of 1pm, and be 90 (transmissions) by splitting ratio: the second beam splitter prism of 10 (reflections) irradiates and enters oxygen absorption pond, transmission is there is after the received pulse laser of oxygen absorption pond, if this pulse laser light intensity transmitance is 70%-90%, then the 2nd Ti:SAPPIRE power oscillator just regulates the pulsed laser irradiation that obtains to the air in overhead, ocean, otherwise regenerate pulse laser until this pulse laser is the air exposing to overhead, ocean after 70%-90% by the light intensity transmitance in oxygen absorption pond.
3, optical subsystem is received
The receiving telescope that spaceborne marine atmosphere temperature, density and humidity detect DIAL adopts bore to be 1.5m coaxial type light path Cassegrain optical antenna structure altogether.Wherein telescopic system is made up of primary mirror and secondary mirror, and the difficulty of processing of such heavy-caliber paraboloid type primary mirror can reduce relatively, and its error carries out compensation to a certain degree by the secondary mirror that bore is less, and the disc of confusion at telescope focus place is obviously reduced.In addition, this kind of design can make telescopical volume greatly reduce, and can receive echoed signal with comparatively small field of view, and this suppression for background interference light has obvious effect.
Through the laser echo signal of optical antenna receiving telescope, according to pre-service before the optical spectroscopic path implement opto-electronic conversion be illustrated in fig. 5 shown below, the reception optics that the program is set forth is made up of two-way output channel, is realized the object of great dynamic range laser echo signal detection by the APD type Si detector of different gains.The mode that filter system adopts narrow band pass filter to be combined with etalon, with the interference of Background suppression light.
4, signal processing subsystem
For the signal processing subsystem of marine atmosphere temperature, density, humidity DIAL, mainly complete the opto-electronic conversion of echoed signal, amplification, filtering and analog to digital conversion.Wherein, detecting module adopts high sensitivity low noise detector; Bandwidth match, high-amplification-factor signal power amplifier; Data acquisition module adopts the components such as high precision, high speed data acquisition system and real time signal processing circuit to carry out design and realizes, and guarantees the high sensitivity of laser radar electronics, high stability and high reliability.
The content be not described in detail in instructions of the present invention belongs to the known technology of those skilled in the art.
Claims (5)
1. a spaceborne marine atmosphere parameter Airborne Lidar examining system, is characterized in that comprising tunable laser subsystem, receiving optical subsystem, signal processing subsystem, control and data process subsystem, wherein
Control and data process subsystem, comprise control module and data processing module; Start-up command is delivered to tunable laser subsystem by control module, and electric signal enlargement factor, analog to digital conversion parameter are delivered to signal processing subsystem; The digital signal that data processing module Received signal strength processing subsystem sends, uses Difference Absorption algorithm to calculate the concentration of oxygen and steam in marine atmosphere, and then obtains the temperature of marine atmosphere, humidity and density according to the equation of gas state; Described analog to digital conversion parameter comprises analog to digital conversion sampling rate, analog to digital conversion quantization digit;
Tunable laser subsystem, comprises 935nm generating laser, 761nm generating laser; 935nm generating laser, receive control with the start-up command that sends of control module in data process subsystem after, generation live width is the laser of the 935nm of 1.0pm and exposes to the air in overhead, ocean; 761nm generating laser, receive control with the start-up command that sends of control module in data process subsystem after, generation live width is the laser of the 761nm of 1.0pm and exposes to the air in overhead, ocean;
Receive optical subsystem, comprise optical telescope, optical filtering beam splitting system; Optical telescope, the backscatter signal produced after the reception laser of 935nm and the laser of 761nm expose to the air in overhead, ocean, and deliver to optical filtering beam splitting system respectively; Optical filtering beam splitting system, isolates the light signal of 935nm wavelength and the light signal of 761nm wavelength, and delivers to signal processing subsystem respectively from the backscatter signal produced after the laser of 935nm and the laser of 761nm expose to air;
Signal processing subsystem, receives electric signal enlargement factor, analog to digital conversion parameter that control module sends; Opto-electronic conversion is carried out respectively after the light signal of 935nm wavelength that reception optical filtering beam splitting system sends and the light signal of 761nm wavelength, amplify according to electric signal enlargement factor after obtaining corresponding electric signal, then carry out analog to digital conversion according to analog to digital conversion parameter and obtain its digital signal corresponding respectively, digital signal is delivered to control and data process subsystem.
2. one according to claim 1 spaceborne marine atmosphere parameter Airborne Lidar examining system, is characterized in that: described 935nm generating laser comprises the first injection seeded laser diode, a Nd:YAG pump unit, a Ti:SAPPIRE power oscillator, the first beam splitter prism, water vapor absorption pond, first injection seeded laser diode is after receiving the start-up command controlling to send with control module in data process subsystem, a Nd:YAG pump unit is driven to produce optical maser wavelength 935nm, the pulse laser of pulsewidth 500ns also delivers to a Ti:SAPPIRE power oscillator, regulate after one Ti:SAPPIRE power oscillator received pulse laser, obtaining wavelength is 935nm, pulse energy is 100mJ, pulsewidth is 500ns, impulse ejection is spaced apart 400 μ s, spectrum width is the pulse laser of 1pm, and enter water vapor absorption pond by the first beam splitter prism irradiation, transmission is there is after the received pulse laser of water vapor absorption pond, if this pulse laser light intensity transmitance is 70%-90%, then a Ti:SAPPIRE power oscillator just regulates the pulsed laser irradiation that obtains to the air in overhead, ocean, otherwise regenerate pulse laser until this pulse laser is the air exposing to overhead, ocean after 70%-90% by the light intensity transmitance in water vapor absorption pond.
3. one according to claim 1 and 2 spaceborne marine atmosphere parameter Airborne Lidar examining system, is characterized in that: described 761nm generating laser comprises the second injection seeded laser diode, the 2nd Nd:YAG pump unit, the 2nd Ti:SAPPIRE power oscillator, the second beam splitter prism photograph, oxygen absorption pond, second injection seeded laser diode is after receiving the start-up command controlling to send with control module in data process subsystem, the 2nd Nd:YAG pump unit is driven to produce optical maser wavelength 761nm, the pulse laser of pulsewidth 500ns also delivers to the 2nd Ti:SAPPIRE power oscillator, regulate after 2nd Ti:SAPPIRE power oscillator received pulse laser, obtaining wavelength is 761nm, pulse energy is 100mJ, pulsewidth is 500ns, impulse ejection is spaced apart 400 μ s, spectrum width is the pulse laser of 1pm, and enter oxygen absorption pond by the second beam splitter prism irradiation, transmission is there is after the received pulse laser of oxygen absorption pond, if this pulse laser light intensity transmitance is 70%-90%, then the 2nd Ti:SAPPIRE power oscillator just regulates the pulsed laser irradiation that obtains to the air in overhead, ocean, otherwise regenerate pulse laser until this pulse laser is the air exposing to overhead, ocean after 70%-90% by the light intensity transmitance in oxygen absorption pond.
4. one according to claim 1 and 2 spaceborne marine atmosphere parameter Airborne Lidar examining system, is characterized in that: described optical telescope bore is the coaxial type light path Cassegrain antenna structure altogether of 1.5m.
5. one according to claim 1 and 2 spaceborne marine atmosphere parameter Airborne Lidar examining system, is characterized in that: the mode that described optical filtering beam splitting system adopts narrow band pass filter and etalon to combine.
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