Chinese Optics Letters, Volume. 23, Issue 1, 011203(2025)
Real-time synchronous detection of wind and aerosol using a coherent lidar
Figures & Tables(9)
Fig. 2. Data processing procedure of wind, cloud height, extinction coefficient, visibility, and aerosol concentration.
Fig. 4. Aerosol extinction coefficients in (a) a hazy day, (b) an overcast and rainy day, and (c) a foggy day.
Fig. 5. SNRs in (a) a hazy day, (b) an overcast and rainy day, and (c) a foggy day.
Fig. 6. October 11-13, 2022, Chengdu. (a) Data fusion of extinction coefficient, cloud height, and wind field. (b) SNR.
Table 1. System Parameters of the CL
View tableView in ArticleTable 1. System Parameters of the CL
Symbol Parameter Value Detector responsivity (A/W) 1 G Electronics conversion gain (V/A) 30000 RL Impedance (Ω) 50 SR Signal sampling rate (MHz) 400 N Number of sampling points 512 PL Power of the local oscillator signal (mW) 0.5 F Focal length (m) 5000 at Telescope radius (mm) 50 E Pulse energy (µJ) 150 B Receiving bandwidth (MHz) 200
Table 2. Comparison of the CL and AL
View tableView in ArticleTable 2. Comparison of the CL and AL
System CL AL Wavelength (nm) 1550 532 Detection mode Coherent detection Direct detection Range (km) 10 15 Antenna T-R combine, 100 mm T-R separate, 160 mm Pulse energy (µJ) 150 20 Pulse repetition rate (kHz) 10 2 Range resolution (m) 15–200 (adjustable) 15 Wind speed accuracy (m/s) 0.5 — Wind direction accuracy (deg) 3 — Azimuth scanning range (deg) 0–360 — Zenith scanning range (deg) 0–90 90 Weight (kg) 60 — Data product Wind; extinction coefficient; aerosol concentration; visibility; cloud height Extinction coefficient; visibility; PM10; PM2.5; depolarization ratio Advantage Without geometric factor; eye-safe; high sensitivity; high time resolution Visible light; closer to human visibility Disadvantage Secondary data acquisition time; invisible light; data conversion required Long acquisition time; not eye-safe; blind zone; geometric factor correction required
Table 3. Comparison of the Aerosol Concentration and SNR
View tableView in ArticleTable 3. Comparison of the Aerosol Concentration and SNR
Item Weather Figure Aerosol concentration 2022/3/24 Hazy day (a) Closely aligned 2022/3/30 Overcast and rainy day (b) Congruent; during precipitation events (21:00-0:00), data from CL were missing, while AL continued, although its reliability is not high due to the rain 2022/4/5 Foggy day (c) Propinquity; the data gaps between 0:00 to 9:00 in AL may be caused by geometric factors
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Yue Shi, Xiong Luo, Peiyu Sun, Jihui Dong, Lei Tang, Jie Zhou, Ke Wang, Chunli Chen, Yunshi Wang, Dingfu Zhou, "Real-time synchronous detection of wind and aerosol using a coherent lidar," Chin. Opt. Lett. 23, 011203 (2025)
Paper Information
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Received: Jun. 12, 2024
Accepted: Jul. 29, 2024
Posted: Jul. 30, 2024
Published Online: Feb. 19, 2025
The Author Email: Xiong Luo (luoxiong1987@163.com), Jihui Dong (j.h.dong@163.com), Dingfu Zhou (df_xh_zhou@sina.com)
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