Mie-Raman lidar for fine-detection of atmospheric aerosol profiles
Mie-Raman lidar for fine-detection of atmospheric aerosol profiles
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DOI：
10.1117/12.819587
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发表时间：
2008-12
期刊：
影响因子：
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通讯作者：
F. Gao;Jiandong Mao;Yi Zhou;Jun Liu;Dengxin Hua
中科院分区：
文献类型：
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作者：
F. Gao;Jiandong Mao;Yi Zhou;Jun Liu;Dengxin Hua
拉曼激光雷达技术具有精确测量气溶胶消光系数的能力。研制了一台米氏拉曼激光雷达，用于测量大气气溶胶的消光系数、体积后向散射系数和激光雷达比等光学特性。利用高分辨率光栅和窄带滤光片将氮分子的振动拉曼信号和Mie Rayleigh散射信号进行空间分离，然后用两个带前置放大器的光电倍增管进行探测。初步实验表明，采用模拟探测模式的Mie-Raman激光雷达系统，在激光能量为250 mJ、积分时间为8分钟的条件下，能够测量3 km高度的气溶胶剖面。
The Raman lidar technique has the capability of accurately profiling the extinction coefficient of aerosol. A Mie-Raman lidar was developed for measuring the optical properties of atmospheric aerosol, such as extinction coefficient, volume backscatter coefficient and lidar ratio. The vibrational Raman signal of nitrogen and Mie-Rayleigh scattering signal are separated spatially by use of the high-resolution grating and narrow bandpass filters, and then detected by two photomultiplier tubes with a pre-amplifier. Preliminary experiments show that the Mie-Raman lidar system operated in analog detection mode has the capability of measuring aerosol profiles up to a height of 3km with 250mJ of laser energy and 8 minute integration time.