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Simulation and design of solar-blind Raman Lidar for water vapor measurement
Author(s): Dongchen Shi; Dengxin Hua; Fei Gao; Ning Lei; Li Wang
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Paper Abstract

A novel water vapor Raman Lidar is developed at a solar-blind wavelength of 266nm. To obtain signals of Mie-Rayleigh scattering spectra and Raman scattering spectra of H2O, N2 and O2 with fine separation and high efficient extraction, a newly high-efficiency Raman polychromatic system is designed using the combination of dichroic mirrors and narrow– band interference filters. Using the standard atmospheric scattering models and aerosol extinction coefficients, the rejection rate of Mie-Rayleigh scattering signals and the signal-to-noise ratio of atmospheric water vapor measurement are simulated. The optimal parameters of Lidar system are obtained based on the detailed analysis and the discussion of the SNR of echo signals. Lidar emission wavelength and Raman scattering echo wavelengths are all in the ultraviolet range below 300nm known as the “solar-blind” region, because practically all radiation at these wavelengths is absorbed by the ozone layer in the stratosphere. It has the advantage of detecting water vapor in the daytime without the influence of solar background radiation in the system. Through the comparison between the Raman Lidars at the wavelengths of 266nm and 355nm respectively, it is concluded that the detection performance of the designed system at 266nm is better than the Raman Lidar system at 355nm during the daytime measurement, and the measurement height can be up to the 4 km.

Paper Details

Date Published: 28 February 2017
PDF: 7 pages
Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102565Z (28 February 2017); doi: 10.1117/12.2256278
Show Author Affiliations
Dongchen Shi, Xi'an Univ. of Technology (China)
Dengxin Hua, Xi'an Univ. of Technology (China)
Fei Gao, Xi'an Univ. of Technology (China)
Ning Lei, Xi'an Univ. of Technology (China)
Li Wang, Xi'an Univ. of Technology (China)


Published in SPIE Proceedings Vol. 10256:
Second International Conference on Photonics and Optical Engineering
Chunmin Zhang; Anand Asundi, Editor(s)

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