Performance of Continuous-wave Coherent Doppler Lidar for Wind Measurement

Shan Jiang; Dongsong Sun; Yuli Han; Fei Han; Anran Zhou; Jun Zheng

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자료유형: 학술저널

저자정보: Shan Jiang (University of Science and Technology of China) Dongsong Sun (University of Science and Technology of China) Yuli Han (University of Science and Technology of China) Fei Han (University of Science and Technology of China) Anran Zhou (University of Science and Technology of China) Jun Zheng (University of Science and Technology of China)

저널정보: 한국광학회 Current Optics and Photonics Current Optics and Photonics Vol.3 No.5

발행연도: 2019.10

수록면: 466 - 472 (7page)

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A system for continuous-wave coherent Doppler lidar (CW lidar), made up of all-fiber structures and a coaxial transmission telescope, was set up for wind measurement in Hefei (31.84 N, 117.27 E), Anhui province of China. The lidar uses a fiber laser as a light source at a wavelength of 1.55 μm, and focuses the laser beam on a location 80 m away from the telescope. Using the CW lidar, radial wind measurement was carried out. Subsequently, the spectra of the atmospheric backscattered signal were analyzed. We tested the noise and obtained the lower limit of wind velocity as 0.721 m/s, through the Rayleigh criterion. According to the number of Doppler peaks in the radial wind spectrum, a classification retrieval algorithm (CRA) combining a Gaussian fitting algorithm and a spectral centroid algorithm is designed to estimate wind velocity. Compared to calibrated pulsed coherent wind lidar, the correlation coefficient for the wind velocity is 0.979, with a standard deviation of 0.103 m/s. The results show that CW lidar offers satisfactory performance and the potential for application in wind measurement.

#Doppler lidar #wind measurement #continuous wave laser #coherent detection #Rayleigh criterion

참고문헌 (20)

참고문헌 신청

C. Hill / 2018 / Coherent focused lidars for Doppler sensing of aerosols and wind / Remote Sens 10:466

X. D. Jia / 2015 / Optimal design of the telescope in coherent lidar and detection performance analysis / ATCA Opt. Sin 35:0301001

E. Brinkmeyer / 2013 / Continuous wave synthetic low-coherence wind sensing Lidar : motionless measurement system with subsequent numerical range scanning / Opt. Express 21:1872~1897

P. J. Rodrigo / 2014 / Diode laser lidar wind velocity sensor using a liquid-crystal retarder for non-mechanical beam-steering / Opt. Express 22:26674~26679

T. Beuth / 2015 / Parameterization of a geometrical reaction time model for two beam nacelle lidars / Proc. SPIE 9612:96120J

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