Infrared and Laser Engineering, Volume. 49, Issue 8, 20190501(2020)
Opto-mechanical system structure and research progress of space-borne lidar for cloud-aerosol
Figures & Tables(37)
Fig. 12. Detector standard boxes for Mode 1 (LFOV and RFOV) and Mode 3
Table 1.
Detection mission of the LITE
LITE探测任务
View tableView in ArticleTable 1.
Detection mission of the LITE
LITE探测任务
Troposphere Stratosphere Cloud Earth’s surface Relationship between aerosol scattering ratio and wavelength height and structure of PBL Optical thickness of PBL Relationship between aerosol scattering ratio and wavelength atmospheric density and temperature within 40 km Vertical distribution, cloud cover reflectivity, optical thickness Reflectivity relation between backscatter and incident angle
Table 2.
Laser performance parameters
激光器性能参数
View tableView in ArticleTable 2.
Laser performance parameters
激光器性能参数
Item Value Output wavelenth/nm 1 064 532 355 Laser A output energy/mJ 470 530 170 Laser A beam divergence/mrad 1.8 1.1 0.9 Laser B output energy/mJ 440 560 160 Laser B beam divergence/mrad 1.8 1.2 1.1 Pulse repetition rate/Hz 10 Pulse width/ns 27
Table 3.
Receiving system parameters
接收系统参数
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Receiving system parameters
接收系统参数
Item Value Aft optics Wavelength/nm 1 064 532 355 Quantum efficiency 33 14 21 Color filter bandwidth/nm 675 265 60 Interference filter bandwidth/nm 0.8 0.35 1 Interference gilter transmission 46% 45% 33% Optical throughput (night) 64% 45% 42% Optical throughput (day) 29% 20% 14% Field of view (all wavelengths) Selectable:1.1 mrad, 3.5 mrad, annular, blocked Telescope Primary mirror diameter/in 37.25 Secondary mirror diameter/in 12.25 Focal length 189.0 Focal ratio F /5.1Obscuration ratio 0.11
Table 4.
CALIOP transmitter system parameters
CALIOP发射系统参数
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CALIOP transmitter system parameters
CALIOP发射系统参数
Item Value Laser Diode-pumped Nd:YAG Pulse energy 110 mJ:1 064 nm 110 mJ:532 nm Pep rate 20.16 Hz Pulse length 20 ns Line width 30 pm Polarization purity >1 000∶1 (532 nm) Beam divergence (after beam expander) Boresight range ±1°,1.6 μrad steps Laser environment 18 psia, dry air
Table 5.
CALIOP receiving system parameters
CALIOP接收系统参数
View tableView in ArticleTable 5.
CALIOP receiving system parameters
CALIOP接收系统参数
Item Value Telescope diameter 1 m Field of view/mrad 130(full angle) Digitizer sample rate/MHz 10 Vertical sample spacing/m 15 Electronic bandwidth/MHz 2.0 Vertical resolution as determined by bandwidth/m 30 Digitizer resolution/bits 14 Maximum dynamic range(merged) 2.5 E6(>21 bits) 532 nm channel Detector PMT Etalon passband/pm 37 Etalon peak transmission 85% Blocking filter/pm 770 1 064 nm channel Detector APD Optical passband/pm 450 Peak transmission 84%
Table 6.
CATS main science modes
CATS主要科学模式
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CATS main science modes
CATS主要科学模式
Science mode 1 Backsctter:532,1 064 nm No HSRL Depolarization: 532,1 064 nm Science mode 2 Backsctter:532,1 064 nm HSRL:532 nm Depolarization: 1 064 nm Science mode 3 Backsctter:355,532,1 064 nm No HSRL Depolarization: 532,1 064 nm Science modes 4,5,6 Backup mode Use laser 2 and receiver from mode 1 
Table 7.
Performance parameters of laser 1
激光器1性能参数
View tableView in ArticleTable 7.
Performance parameters of laser 1
激光器1性能参数
Item Parameters Laser1 Nd:YVO4 Repetition rate 5 000 Hz Output divergence 532 nm:0.75 mrad to 1.125 mrad 1 064 nm: 0.75 mrad to 1.8 mrad Output beam diameter 532 nm:<1 300 1 064 nm:<1 300 Output beam energy 2 mJ: 532 nm 2 mJ: 1 064 nm Wavelength 532.12 nm 1 064.25 nm Line width 532 nm:45 pm 1 064 nm:100 nm Pulse width 532 nm:<10 ns 1 064 nm:<10 ns M 2532 nm:1.1-1.2 1 064 nm:1.2-13 Polarization 532 nm:>100:1 532 nm: >100:1
Table 8.
Performance parameters of laser 2
激光器2性能参数
View tableView in ArticleTable 8.
Performance parameters of laser 2
激光器2性能参数
Laser2 Injection-seeded, pulsed Nd: YVO4 2 wavelengths 3 wavelengths Repetition rate 4000 Hz Output divergence 355 nm N/A 0.7 mrad to 1.875 mrad 532 nm 0.75 mrad to 1.125 mrad 1.275 mrad to 1.875 mrad 1 064 nm 0.75 mrad to 1.8 mrad 1.275 mrad to 3 mrad Output beam diameter 355 nm N/A <1300 532 nm <1300 1 064 nm Output beam energy 355 nm N/A 2 mJ 532 nm 2 mJ 1 064 nm Wavelength 355 nm N/A 354.75 532 nm 532.12 nm 532.12 nm 1 064 nm 1064.25 nm 1064.25 nm Line width 355 nm N/A 0.08 pm 532 nm <0.5 pm 0.145 pm 1 064 nm 0.5 pm Pulse width 355 nm N/A <10 ns 532 nm <10 ns 1 064 nm M 2355 nm N/A 1.08 532 nm 1.25 1.5 1 064 nm 1.39 3.1 Polarization 355 nm N/A >100∶1 532 nm >100∶1 1 064 nm
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Lu Li, Chenbo Xie, Peng Zhuang, Kunming Xing, Zhiyuan Fang, Yufei Chu, Jiadi Shao, Bangxin Wang. Opto-mechanical system structure and research progress of space-borne lidar for cloud-aerosol[J]. Infrared and Laser Engineering, 2020, 49(8): 20190501
Paper Information
Category: 激光器与激光光学
Received: Dec. 18, 2019
Accepted: --
Published Online: Dec. 31, 2020
The Author Email: Wang Bangxin (bxwang@aiofm.ac.cn)
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