Analysis of an all-fiber Raman lidar system for water vapor by fiber Fabry-Perot filters

Abstract

Abstract:

An all-fiber Raman water vapor lidar system is proposed and designed based on fiber Fabry-Perot (F-P) filters in the visible wavelength domain, to achieve the fine-detection of the atmospheric water vapor and aerosols properties. The influences of cavity loss and the reflectance on the fitness, the transmission peak and the bandwidth of fiber F-P filters are analyzed that the fiber F-P filter features a higher transmission peak and narrower bandwidth under the condition of the F-P cavity loss less than 3%. The combination of fiber band-pass filters and the two-cascade fiber F-P filters is used as fiber spectroscopic system and the corresponding parameters are designed to achieve narrow-band high-peak transmission of the Raman signals of water vapor (660nm) and nitrogen (606nm) and Mie-Rayleigh signals (532nm), respectively, and obtain high rejection-rate of stray lights. The numerical simulations of the intensity distribution of returned signals、the water vapor vertical profile and the detection signal to noise ratio(SNR) are obtained respectively, to verify the feasibility of the system.

Key words: remote sensing, water vapor, Raman lidar, fiber F-P filter

Wang Yufeng, Hua Dengxin, Wang Hongwei, Di Huige . Analysis of an all-fiber Raman lidar system for water vapor by fiber Fabry-Perot filters[J]. J4, 2013, 30(1): 103-109.

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