光强闪烁激光雷达的背景噪声分析

J4 ›› 2013, Vol. 30 ›› Issue (5): 628-634.

光强闪烁激光雷达的背景噪声分析

崔朝龙,黄宏华,陶宗明,饶瑞中

1 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室，安徽合肥 230031； 2 中国科学院大学，北京 100039

收稿日期:2012-11-13 修回日期:2013-01-15 出版日期:2013-09-28 发布日期:2013-09-17
通讯作者: 饶瑞中（1963-）研究员，博士生导师，主要从事激光、红外辐射和图像的大气传输、大气光学特性及其光学测量方法研究。 E-mail:rao@aiofm.ac.cn
作者简介:崔朝龙（1983-）博士生，主要从事湍流大气光学特性研究。E-mail：clcui@aiofm.ac.cn
基金资助:
国家自然科学基金资助课题(41105020)

Analysis of noise in residual turbulent scintillation lidar

CUI Chao-long, HUANG Hong-hua, TAO Zong-ming, RAO Rui-zhong

1 Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences，Hefei 230031, China; 2 University of Chinese Academy of Sciences, Beijing 100039 , China

Received:2012-11-13 Revised:2013-01-15 Published:2013-09-28 Online:2013-09-17

摘要/Abstract

摘要： 介绍了光强闪烁激光雷达回波信号中背景噪声的分类，通过某次实验中实验条件的变化，获得了采集卡本底噪声、放大器本底噪声、PMT本底噪声、自然背景光噪声和散粒噪声等不同背景噪声叠加在一起的大小和方差信息，以及不同噪声各自本身的方差信息。通过不同噪声之间的比较，发现在未接收激光大气散射回波信号时，放大器本底噪声占主导，自然背景光噪声相对于其他噪声是小量；在接收散射回波信号时，近距离内（低层通道2km，高层通道4km）散粒噪声占主导，远距离上处于弱势。实验结果确定了不同噪声对总背景噪声的贡献程度，为光强闪烁激光雷达从散射回波信号中提取大气湍流信息提供了依据，也为消除噪声对有效信号的影响提供了指导。

关键词: 大气光学, 激光雷达噪声, 方差, 噪声比例因子（NSF）

Abstract: The classification of noise in the returned signal of RTS(Residual Turbulent Scintillation) lidar was introduced. Based on changing condition of experimental status, the amplitude and variance of different sum of the baseline of A/D card, amplifier, PMT, background noise and shot noise was acquired, and so was themselves. By comparison of different noise, it is found that the baseline of amplifier is primary and background noise is small when telescope don’t receive atmospheric scattering signal. When telescope receives scattering signal, the shot noise is primary in near range (2km for near channel and 4km for far channel), and is small in far range. The experiment results determine different impact of different noise on total noise, and provide suggestion on acquiring atmospheric turbulence form returned signal of RTS lidar , as also as reducing influence of noise on effective signal.

Key words: atmospheric optics, lidar noise, variance, noise scale factor

中图分类号:

P427.1

崔朝龙黄宏华陶宗明饶瑞中. 光强闪烁激光雷达的背景噪声分析[J]. J4, 2013, 30(5): 628-634.

CUI Chao-long, HUANG Hong-hua, TAO Zong-ming, RAO Rui-zhong. Analysis of noise in residual turbulent scintillation lidar[J]. J4, 2013, 30(5): 628-634.

参考文献

[1]Liu Bo, Zhong Zhiqing, Zhou Jun.Development of a Mie scattering lidar system for measuring whole tropospheric aerosols[J].J.Opt A:Pure Appl. Opt,2007,9:828-832 [2]Zhang Yinchao, Hu Huanling, Shao Shisheng, et al.Measurement of SO2, NO2 and O3in Beijing by DIAL[J].Chinese Journal of Quantum Electronics(量子电子学报,2006,23(3):346-350 [3]Sun Dongsong, Zhong Zhiqing, Wang Bangxin, et al.Direct detection doppler wind lidar based on dual FP etalon[J].Chinese Journal of Quantum Electronics(量子电子学报,2006,23(3):303-306 [4]Hu Shunxing, Hu Huanling, Wu Yonghua, et al.L625 Differential Absorption Lidar System for Tropospheric Ozone Measurements[J].Acta Optica Sinica,2004,24(5):597-601 [5]Banakh V A, Mironov V L. .Lidar in a turbulent atmosphere[J].Norwood: Artech House,1987,:- [6]Belen'kii M S.Effect of residual turbulent scintillation and a remote-sensing technique for simultaneous determination of turbulence and scattering parameters of the atmosphere[J].J Opt Soc Am A,1994,11(3):1150-1158 [7]Gimmestad G G, Belen'kii M S.Prospects for laser remote sensing of Cn^2[J].Proc of SPIE,1995,2471:482-486 [8]Ni Zhibo, Huang Honghua, Mei Haiping, et al. .Extracting turbulence information from echo signal of micro-pulse lidar[J].Proc of SPIE,7382,2009:- [9]Cui Chaolong, Huang Honghua, Mei Haiping, et al.Study on acquiring turbulence information using mie scattering lidar[J].Journal of Atmospheric and Environmental Optics,2011,6(2):89-94 [10]Liu Zhaoyan, Hunt William, Vaughan Mark, et al.Estimating random errors due to shot noise in backscatter lidar observations[J].Appl. Opt,2006,45(18):4437-4447 [11]Tao Zongming, Zhang Qingze, Fang Xin, et al.Estimation of random errors for backscatter lidar observations[J].Acta photonica Sinica(光子学报,2009,38(12):3279-3282 [12]Wu Decheng, Liu Bo, Chen Tao, et al. .Estimation of SNR from lidar returned signal[J].The 5th proceeding of atmospheric detecting, environment remote sensing and meteorologic electronics,2009,:12-15 [13]Sun Jingqun.Atmosphere detection by laser[J].Beijing: Science Press,1986,:173-179 [14]An Yuying, Zeng Xiaodong, Feng Jijun.. Photoelectric detecting and signal processing[J].Beijing: Science Press,2010,:- [15] J.W.Goodman.. Statistical optics[J].Beijing: Science Press,1992:,:419-442