CN105914572B - Sodium layer wind-warm syndrome detecting laser radar emits laser system - Google Patents
Sodium layer wind-warm syndrome detecting laser radar emits laser system Download PDFInfo
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- CN105914572B CN105914572B CN201610398867.6A CN201610398867A CN105914572B CN 105914572 B CN105914572 B CN 105914572B CN 201610398867 A CN201610398867 A CN 201610398867A CN 105914572 B CN105914572 B CN 105914572B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/1068—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using an acousto-optical device
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10084—Frequency control by seeding
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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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- Optics & Photonics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a kind of sodium layer wind-warm syndrome detecting laser radar emission systems, are related to sodium layer wind-warm syndrome detecting laser radar field.The system is made of seed laser unit (1), acousto-optic modulation unit (2), Raman fiber laser amplifier unit (3), frequency multiplication and pulse laser amplifying unit (4) and atomic frequency-stabilized laser control unit (5).It is connected between each unit using optical fiber, and the inside of acousto-optic modulation unit and Raman fiber laser amplifier unit also uses optical fiber structure, makes to be greatly reduced between unit by temperature and vibration influence inside unit, space layout is no longer restricted.Have many advantages, such as it is compact-sized, small in size, convenient for integrated, strong environmental adaptability, stable and reliable in work.
Description
Technical field:
The present invention relates to sodium layer wind-warm syndrome detecting laser radar, in particular to sodium layer wind-warm syndrome detecting laser radar
Emit laser system.
Background technique:
Atmospheric Survey laser radar is to one of the wind field of high-altitude 80-110km range sodium layer and method of temperature sensing at present
Be: using sodium atom spectral line in sodium layer with temperature Doppler's spectrum widening and sodium atom spectral line with wind speed Doppler spectrum frequency
Principle is moved, fluorescence is generated using three frequency narrow-linewidth lasers excitation sodium atom, by receiving the intensity of three frequency fluorescence signals, is carried out anti-
It drills and obtains wind field and temperature.
(the Retrieving mesopause temperature and line-of-sight wind from of document 1
Full-diurnal-cycle Na lidar observations, DAVIDA.KRUEGER et al., Applied
Optics, Vol.54, No.32, November 102015) disclose a kind of sodium layer wind-warm syndrome detecting laser radar system, the system
Transmitting laser system include: Dye Ring seed laser unit (CW Seed Injection), acousto-optic modulation unit
(Acousto Optic Modulation), atomic frequency-stabilized laser control unit (Doppler-Free Spectroscopy) and pulse
The composition such as laser amplifier (Amplification), obtains the excellent observation data of a large amount of sodium layer wind-warm syndrome.But the program
Since Dye Ring seed laser unit, until the laser of pulse laser amplifying unit exports, it is all made of free optical path, from
Very long by the light path of optical path, any link especially front end optical path in light path can all be made slightly by environment temperature or vibration influence
At the offset of rear end optical path, entire laser system job stability is caused to be affected, or even is unable to normal observation operation.
Document 2 (all solid state narrowband sodium fluorescence laser radar system and Preliminary Observational Results, Xia Yuan etc., Chinese laser, the
Volume 42, optics forward position-laser technology monograph, in September, 2015) propose a kind of use whole optical fiber acousto-optic scheme, make part light
Road is transmitted in the optical fiber in non-free space, significantly improves work of the transmitting laser system at temperature and vibration environment
Make stability, but most of optical path still uses free space transmission mode, the ability of resisting temperature and vibration influence is limited.
Summary of the invention:
The object of the present invention is to provide a kind of sodium layer wind-warm syndrome detecting laser radars to emit laser system.The system
Seed laser unit, acousto-optic modulation unit, Raman fiber laser amplifier unit, frequency multiplication and pulse laser amplifying unit and atom are steady
Optical fiber connection is all made of between frequency control unit, and the inside of acousto-optic modulation unit and Raman fiber laser amplifier unit also uses
Optical fiber structure makes to be greatly reduced between unit by temperature and vibration influence inside unit, and space layout is no longer restricted.Have
It is compact-sized, small in size, convenient for integrated, strong environmental adaptability, it is stable and reliable in work the advantages that.
To achieve the goals above, the present invention adopts the following technical scheme:
Sodium layer wind-warm syndrome laser radar emission system is by seed laser unit (1), acousto-optic modulation unit (2), Raman light
Fine laser amplifier unit (3), frequency multiplication and pulse laser amplifying unit (4) and atomic frequency-stabilized laser control unit (5) composition.
Wherein, seed laser unit (1) uses the grating external-cavity feedback semiconductor laser of optical fiber output, and output wavelength is
The seed laser of 1178nm；
Acousto-optic modulation unit (2) is by photoswitch controller (21), the first photoswitch (22), the second photoswitch (23), first
Acousto-optic modulator (24) and second sound-optic modulator (25) composition；The both ends of first sound-optic modulator (24) are connected by optical fiber respectively
It is connected to the first output end (22A) of the first photoswitch (22) and the first input end (23A) of the second photoswitch (23), the second acousto-optic
The both ends of modulator (25) pass through the second output terminal (22B) and the second photoswitch that optical fiber is connected to the first photoswitch (22) respectively
The third output end (22C) of 23 the second input terminal (23B), the first photoswitch (22) is connected to the second photoswitch by optical fiber
(23) third input terminal (23C)；The output end of photoswitch controller (21) is connected to the first photoswitch (22) and the second light is opened
Close the control terminal of (23)；Raman fiber laser amplifier unit (3) is by the first optoisolator (31), pumping semiconductor laser
(32), raman amplification fiber (33) and the second optoisolator (34) composition；The output end of first optoisolator (31) is connected to drawing
The output laser of graceful amplifying fiber (33), pumping semiconductor laser (32) is connected to raman amplification fiber (33) by optical fiber,
The output light of raman amplification fiber (33) enters the input terminal of the second optoisolator (34)；
Frequency multiplication and pulse laser amplifying unit (4) by condenser lens (41), frequency-doubling crystal (42), collimation lens (43), point
Light microscopic (44), coupled lens (45), impulse laser amplifier (46) composition；Condenser lens (41), frequency-doubling crystal (42), collimation are saturating
Successively straight line is placed for mirror (43), spectroscope (44), coupled lens (45) and impulse laser amplifier (46), wherein frequency-doubling crystal
(42) it is located at condenser lens (41) light spot focus, collimation lens (43) is at a distance from light spot focus equal to collimation lens (43)
The collimated light of focal length, spectroscope (44) and collimation lens (43) output is in 45 degree of angles, the transmission light direction pair of spectroscope (44)
The seed laser input terminal of quasi- impulse laser amplifier (46) is co-axially mounted with light beam in spectroscope (44) reflection light direction and couples
Light is aggregated into optical fiber by lens (45), coupled lens (45)；
Atomic frequency-stabilized laser control unit (5) uses principle identical with Doppler-Free Spectroscopy described in document 1
The path length control of form, output is signally attached to the piezoelectric ceramics of seed laser unit (1).
The output laser of seed laser unit (1) is connected to the first photoswitch in acousto-optic modulation unit (2) by optical fiber
(22) input terminal, the output end of the second photoswitch (23) is connected to Raman fiber by optical fiber and swashs in acousto-optic modulation unit (2)
The input terminal of first optoisolator (31) in optical amplification unit (3), the second optoisolator in Raman fiber laser amplifier unit (3)
(34) output end is by optical fiber output to frequency multiplication and pulse laser amplifying unit (4), and output light and condenser lens (41) are same
Axis；The light of coupled lens (45) convergence is transferred to atomic frequency-stabilized laser control by optical fiber in frequency multiplication and pulse laser amplifying unit (4)
Unit (5).
The invention has the advantages that
1) seed laser unit uses the grating external-cavity feedback semiconductor laser of optical fiber output, swashs with existing Dye Ring
Light device is compared, and internal structure is simple, and optical path is short, small in size, small by environment temperature and vibration influence, is worked more reliable and more stable；
2) laser acousto-optic modulation unit uses all optical fibre structure, and compared with existing free optical path, hardware adjustment is few, compact-sized, volume
It is small, it is small by environment temperature and vibration influence, it works more reliable and more stable；3) seed laser power amplification is amplified using Raman fiber
Mode, it is compact-sized, it is small by environment temperature and vibration influence, it works more reliable and more stable；4) connection between system each unit
It is all made of optical fiber connection, makes complete machine convenient for flexible topology and the system integration, works small by environment temperature and vibration influence.
Detailed description of the invention:
Fig. 1 sodium layer wind-warm syndrome detecting laser radar emits laser system functional block diagram
Wherein, seed laser unit 1, acousto-optic modulation unit 2, Raman fiber laser amplifier unit 3, frequency multiplication and pulse laser
Amplifying unit 4 and atomic frequency-stabilized laser control unit 5.
Fig. 2 seed laser unit schematic diagram
Wherein, 1 seed laser unit, 2 acousto-optic modulation units, 5 atomic frequency-stabilized laser control units.
Fig. 3 acousto-optic modulation unit schematic diagram
Wherein, seed laser unit 1, acousto-optic modulation unit 2, Raman fiber laser amplifier unit 3, photoswitch controller
21, the first photoswitch 22, the second photoswitch 23, first sound-optic modulator 24, second sound-optic modulator 25.
Fig. 4 Raman fiber laser amplifier unit schematic diagram
Wherein, acousto-optic modulation unit 2, Raman fiber laser amplifier unit 3, frequency multiplication and pulse laser amplifying unit 4, first
Optoisolator 31, pumping semiconductor laser 32, raman amplification fiber 33, the second optoisolator 34.
Fig. 5 frequency multiplication and pulse laser amplifying unit schematic diagram
Wherein, seed laser unit 1, Raman fiber laser amplifier unit 3, frequency multiplication and pulse laser amplifying unit 4, atom
Path length control unit 5, condenser lens 41, frequency-doubling crystal 42, collimation lens 43, spectroscope 44, coupled lens 45, pulse laser are put
Big device 46.
Specific embodiment:
With reference to the accompanying drawing, the present invention is further illustrated.
1, system structure
Sodium layer wind-warm syndrome detecting laser radar emits laser system by seed laser unit 1, acousto-optic modulation unit 2, drawing
Graceful optical-fiber laser amplifying unit 3, frequency multiplication and pulse laser amplifying unit 4 and atomic frequency-stabilized laser control unit 5 form, as shown in Figure 1.
Wherein, seed laser unit 1 uses the grating external-cavity feedback semiconductor laser of optical fiber output, and output wavelength is
The seed laser of 1178nm, as shown in Figure 2.The path length control that atomic frequency-stabilized laser control unit 5 exports is signally attached to seed laser
The piezoelectric ceramics of unit 1, the output laser of seed laser unit 1 are connected to the first light in acousto-optic modulation unit 2 by optical fiber and open
Close 22 input terminal.
Acousto-optic modulation unit 2 is by photoswitch controller 21, the first photoswitch 22, the second photoswitch 23, the first acousto-optic modulation
Device 24 and second sound-optic modulator 25 form.As shown in Figure 3.The both ends of first sound-optic modulator 24 are connected to by optical fiber respectively
First output end 22A of the first photoswitch 22 and first input end 23A of the second photoswitch 23, the two of second sound-optic modulator 25
End is connected to the second output terminal 22B of the first photoswitch 22 and the second input terminal 23B of the second photoswitch 23 by optical fiber respectively,
The third output end 22C of first photoswitch 22 is connected to the third input terminal 23C of the second photoswitch 23 by optical fiber；Photoswitch control
The output end of device 21 processed is connected to the control terminal of the first photoswitch 22 and the second photoswitch 23；The output end of second photoswitch 23 is logical
Cross the input terminal that optical fiber is connected to the first optoisolator 31 of Raman fiber laser amplifier unit 3.
Raman fiber laser amplifier unit 3 is by the first optoisolator 31, pumping semiconductor laser 32, raman amplification fiber
33 and second optoisolator 34 form, as shown in Figure 4.The output of first optoisolator 31 is connected to raman amplification fiber 33；Pump
The output laser of Pu semiconductor laser 32 is connected to raman amplification fiber 33 by optical fiber；The output light of raman amplification fiber 33
Frequency multiplication and pulse laser amplifying unit 4 are connected to by optical fiber again through the second optoisolator 34.
Frequency multiplication and pulse laser amplifying unit 4 are by condenser lens 41, frequency-doubling crystal 42, collimation lens 43, spectroscope 44, coupling
Lens 45, the composition of impulse laser amplifier 46 are closed, as shown in Figure 5.In the optical fiber output light side of Raman fiber laser amplifier unit 3
Swash to successively condenser lens 41, frequency-doubling crystal 42, collimation lens 43, spectroscope 44, coupled lens 45 and pulse is placed along straight line
Image intensifer 46, wherein frequency-doubling crystal 42 is located at the light spot focus of the convergence of condenser lens 41, collimation lens 43 and light spot focus
Distance be equal to the focal length of collimation lens 43, the collimated light that spectroscope 44 and collimation lens 43 export is in 45 degree of angles, spectroscope
The seed laser input terminal of 44 transmission light direction alignment impulse laser amplifier 46；Spectroscope 44 reflects light direction and light beam is same
Axis installs coupled lens 45, and light is aggregated into optical fiber, is transmitted through the optical fiber to atomic frequency-stabilized laser control unit 5 by coupled lens 45.
2, working principle
With the device of the invention, the method for obtaining sodium layer wind-warm syndrome detecting laser radar transmitting laser are as follows:
The path length control signal that atomic frequency-stabilized laser control unit 5 exports is adjusted by the piezoelectric ceramics of control seed laser unit 1
The angle of whole grating feedback makes the two frequency multiplication 589nm laser for exporting seed laser wavelength 1178nm be located at sodium atom D2a spectrum
On Doppler-Free spectral line, achieve the purpose that seed laser frequency stabilization.
In acousto-optic modulation unit 2, the output signal of photoswitch controller 21 can the first photoswitch of synchronously control 22 and
Two photoswitches 23, when the first photoswitch 22 is switched to the first output end 22A, the second photoswitch 23 is switched to first input end 23A
When, the laser exported by seed laser unit 1 successively passes through the first photoswitch 22, first sound-optic modulator 24 and the second photoswitch
It is exported after 23, first sound-optic modulator 24 increases laser frequency by 315MHz, and output laser frequency is denoted as 1178f+；When the first light
It is defeated by seed laser unit 1 when switch 22 is switched to second output terminal 22B, the second photoswitch 23 is switched to the second input terminal 23B
Laser out successively exports after the first photoswitch 22, second sound-optic modulator 25 and the second photoswitch 23, the second acousto-optic tune
Device 25 processed makes laser frequency reduce 315MHz, and output laser frequency is denoted as 1178f-；When to be switched to third defeated for the first photoswitch 22
When outlet 22C, the second photoswitch 23 are switched to third access port 23C, the laser exported by seed laser unit 1 successively passes through
It is exported after one photoswitch 22, optical fiber and the second photoswitch 23, laser frequency remains unchanged, and output laser frequency is denoted as 1178f0.
That is: acousto-optic modulation unit 2 can by the frequency modulation(PFM) for the 1178nm seed laser that seed laser unit 1 exports be 1178f+,
Tri- kinds of frequencies of 1178f- and 1178f0, and can selectively be exported under the control of photoswitch controller 21.
After the 1178nm seed laser that acousto-optic modulation unit 2 exports enters Raman fiber laser amplifier unit 3, through the first light
Isolator 31 enters raman amplification fiber 33, in the pumping that the wavelength that pumping semiconductor laser 32 exports is 1120nm laser
Under, the power amplification of 1178nm seed laser is exported through the second optoisolator 34.
The 1178nm seed laser that Raman fiber laser amplifier unit 3 exports enters frequency multiplication and pulse laser amplifying unit 4
Afterwards, it is first converged by condenser lens 41, increases energy density, then the laser for being 589nm through 42 frequency multiplication of frequency-doubling crystal, it is collimated
The collimation of mirror 43 is directional light, and be divided into two bundles by spectroscope 44: the coupled lens 45 of the reflected beams of spectroscope 44 are coupled to optical fiber
In, atomic frequency-stabilized laser control unit 5 is transferred to by optical fiber, atomic frequency-stabilized laser control unit 5 uses and Doppler- described in document 1
The identical principle form of Free Spectroscopy, the path length control signal feedback that atomic frequency-stabilized laser control unit 5 exports to seed
Laser cell 1 makes the two frequency multiplication 589nm for exporting seed laser wavelength 1178nm be located at the Doppler- of sodium atom D2a spectrum
On Free spectral line, achieve the purpose that seed laser frequency stabilization；The transmitted light beam of spectroscope 44 enters impulse laser amplifier 46, pulse
Laser amplifier 46 uses principle form identical with Amplification described in document 1, in the pump of pulse Nd:YAG laser
It is the laser output of short pulse, high-peak power by laser amplifier, which is sodium layer wind-warm syndrome exploring laser light thunder under Pu
The transmitting laser reached.
Claims (1)
1. sodium layer wind-warm syndrome detecting laser radar emission system, which is characterized in that the system is by seed laser unit (1), sound
Light-modulating cell (2), Raman fiber laser amplifier unit (3), frequency multiplication and pulse laser amplifying unit (4) and atomic frequency-stabilized laser control
Unit (5) composition；
Wherein, seed laser unit (1) uses the grating external-cavity feedback semiconductor laser of optical fiber output, and output wavelength is
The seed laser of 1178nm；
Acousto-optic modulation unit (2) is by photoswitch controller (21), the first photoswitch (22), the second photoswitch (23), the first acousto-optic
Modulator (24) and second sound-optic modulator (25) composition；The both ends of first sound-optic modulator (24) are connected to by optical fiber respectively
The first output end (22A) of first photoswitch (22) and the first input end (23A) of the second photoswitch (23), the second acousto-optic modulation
The both ends of device (25) pass through the second output terminal (22B) and second photoswitch 23 that optical fiber is connected to the first photoswitch (22) respectively
The third output end (22C) of second input terminal (23B), the first photoswitch (22) is connected to the second photoswitch (23) by optical fiber
Third input terminal (23C)；The output end of photoswitch controller (21) is connected to the first photoswitch (22) and the second photoswitch (23)
Control terminal；
Raman fiber laser amplifier unit (3) is by the first optoisolator (31), pumping semiconductor laser (32), Raman amplifiction light
Fine (33) and the second optoisolator (34) composition；The output end of first optoisolator (31) is connected to raman amplification fiber (33),
The output laser of pumping semiconductor laser (32) is connected to raman amplification fiber (33) by optical fiber, raman amplification fiber (33)
Output light enter the second optoisolator (34) input terminal；
Frequency multiplication and pulse laser amplifying unit (4) are by condenser lens (41), frequency-doubling crystal (42), collimation lens (43), spectroscope
(44), coupled lens (45), impulse laser amplifier (46) composition；Condenser lens (41), frequency-doubling crystal (42), collimation lens
(43), successively straight line is placed for spectroscope (44), coupled lens (45) and impulse laser amplifier (46), wherein frequency-doubling crystal (42)
At condenser lens (41) light spot focus, collimation lens (43) is equal to the coke of collimation lens (43) at a distance from light spot focus
Away from the collimated light of spectroscope (44) and collimation lens (43) output is in 45 degree of angles, and the transmission light direction of spectroscope (44) is aligned
The seed laser input terminal of impulse laser amplifier (46) is co-axially mounted with light beam in spectroscope (44) reflection light direction and couples
Light is aggregated into optical fiber by mirror (45), coupled lens (45)；
The path length control of atomic frequency-stabilized laser control unit (5) output is signally attached to the piezoelectric ceramics of seed laser unit (1), seed
The output laser of laser cell (1) is connected to the input terminal of the first photoswitch (22) in acousto-optic modulation unit (2), sound by optical fiber
The output end of the second photoswitch (23) is connected in Raman fiber laser amplifier unit (3) by optical fiber in light-modulating cell (2)
The input terminal of first optoisolator (31), the output end of the second optoisolator (34) is logical in Raman fiber laser amplifier unit (3)
Optical fiber output is crossed to frequency multiplication and pulse laser amplifying unit (4), and output light and condenser lens (41) are coaxial；Frequency multiplication and pulse swash
The light that coupled lens (45) converge in optical amplification unit (4) is transferred to atomic frequency-stabilized laser control unit (5) by optical fiber.
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| CN108535739B (en) * | 2018-06-13 | 2023-11-28 | 中国科学技术大学 | All-solid-state continuous wave sodium temperature measurement wind measurement laser radar |
| CN115508864B (en) * | 2022-09-06 | 2023-05-26 | 中国科学院国家空间科学中心 | E-F region wind-temperature-density metal ion detection laser radar and detection method thereof |
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| CN105914572A (en) | 2016-08-31 |
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