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《Acta Photonica Sinica》 2017-07
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Mobile SO_2 Differential Absorption Lidar System

CHEN Ya-feng;WANG Xiao-bin;LIU Qiu-wu;CAO Kai-fa;HU Shun-xing;HUANG Jian;Key Laboratory of Atmospheric Composition and Optical Radiation,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;University of Science and Technology of China;  
A mobile lidar system was developed which can be used to measure the lower layer atmospheric SO_2.The lasers with wavelength of 300.05 nm and 301.50 nm are adopted in this system.The laser beams,produced by two narrow linewidth dye lasers pumped by two Nd:YAG lasers,are frequency doubled by second harmonic generation crystals.They are merged,expanded and transmitted into the atmosphere coaxially with telescope.The back scattering signals are received by the Newton telescope and converted into electrical signals by photomultiplier.The data are obtained by A/D acquisition card and used to estimate the profile of sulfur dioxide.The horizontal detection were field experimented in Huainan,the results show that the mean concentration of atmospheric SO_2 is about 20μg·m-3 in the range from 0.8km to 3.0km.It conforms with the results of ground instrument from meteorological department whose results is about 18-22μg·m-3.
【Fund】: 国家重大科研仪器设备研制专项(No.41127901);; 国家自然科学基金(Nos.41575032 41505019)资助~~
【CateGory Index】: TN958.98
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