紫外域多纵模高光谱分辨率激光雷达探测气溶胶的技术实现和系统仿真

高飞; 南恒帅; 黄波; 汪丽; 李仕春; 王玉峰; 刘晶晶; 闫庆; 宋跃辉; 华灯鑫

doi:10.7498/aps.67.20172036

摘要

多纵模高光谱分辨率激光雷达是一种新型的高光谱分辨率激光雷达.本文在研究典型高功率Nd：YAG脉冲激光器的多纵模模式及其在大气中传输的气溶胶米散射和瑞利散射光谱的基础上，设计紫外域多纵模高光谱分辨率激光雷达系统，采用窄带干涉滤光片滤除太阳背景光的影响，设计可调谐马赫-曾德尔干涉仪，分离提取多纵模激光回波中的气溶胶米散射和瑞利散射光谱，并利用马赫-曾德尔干涉仪双通道输出的互补性原理，精确反演气溶胶光学参量.系统仿真结果表明，所设计的紫外域多纵模高光谱分辨率激光雷达能够实现10 km高度内的气溶胶光学参量精细探测.

关键词:

Abstract

Multi-mode high-spectral-resolution lidar is a new concept of high-spectral-resolution lidar, which uses the multiple-longitudinal-mode pulsed laser rather than the single frequency laser. In this paper, we analyze the multiple longitudinal mode and its spectral distribution of a typical Nd:YAG laser, and calculate its corresponding Mie scattering and Rayleigh scattering spectra, which are a convolution between the spectral distribution of multiple-longitudinal-mode laser pulse and that of the Mie and Rayleigh scattering excited by a single frequency laser pulse. According to the spectral analyses of the elastic lidar returns, we design an ultraviolet multi-mode high-spectral-resolution lidar, in which a high-power non-seeded Nd:YAG pulsed laser at the third harmonic 355 nm wavelength is used as a transmitter, and a Cassegrain telescope serves as a receiver. In the polychromator, a narrow band interfering filter is selected to block the solar background, and a tunable Mach-Zehnder interferometer (MZI) is designed to separate the aerosol Mie scattering signals from the molecular Rayleigh scattering signals excited by the multi-mode pulsed laser. The MZI is composed of a roof mirror mounted on a piezoelectric ceramic and two beam splitters. The optical path difference of the MZI can be adjusted by the piezoelectric ceramic, while its optimum value should make the correspondence between the free spectral range of MZI and the interval between longitudinal modes of Nd:YAG pulsed laser. The photomultiplier tube is selected as a detector, whose output is the convolution between the transmission function of MZI and the Mie and Rayleigh signals excited by the multi-longitudinal mode laser pulse. In the practical experiment, the optimal optical path difference of MZI can be determined by using envelope analysis. For the transmitter laser, when one channel has a maximum output signal and the other has a minimum output, the center wavelength of each longitudinal mode of laser is locked in the optimal optical path difference. The channel of MZI with the maximum output is to pass the Mie scattering signal, while the channel with the minimum output is to block the Mie scattering signal. The aerosol optical characteristics are retrievable by using the complementary properties of the two output channels of MZI. In order to verify the feasibility of the multi-mode high spectral resolution lidar, the system simulation is carried out by using the real atmospheric model and the designed lidar system parameters. The simulation results show that the designed ultraviolet multi-mode high-spectral-resolution lidar can realize the accurate measurement of aerosol within a height of 10 km.

Keywords:

作者及机构信息

1.
西安理工大学机械与精密仪器工程学院, 西安 710048

通信作者: 华灯鑫, dengxinhua@xaut.edu.cn

基金项目: 国家自然科学基金（批准号：41775035，41627807，41305023）、中国博士后基金（批准号：2014M560799）和陕西省科技计划项目（批准号：2014KJXX-64，2014JQ5174）资助的课题.

Authors and contacts

1.
School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China

Corresponding author: Hua Deng-Xin, dengxinhua@xaut.edu.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 41775035, 41627807, 41305023), the China Postdoctoral Science Foundation (Grant No. 2014M560799), and the Science and Technology Program of Shaanxi Province, China (Grant Nos. 2014KJXX-64, 2014JQ5174).

参考文献

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施引文献

[1]	Mao J T, Zhang J H, Wang M H 2002 Acta Meteorolog. Sin. 60 625 (in Chinese) [毛节泰, 张军华, 王美华 2002 气象学报 60 625]
[2]	Cheng C L, Wang G H, Zhou B H, Meng J J, Liu J J, Cao J J, Xiao S 2013 Atmos. Environ. 81 443
[3]	Andreae M O, Rosenfeld D 2008 Earth-Sci. Rev. 89 13
[4]	Yu H B, Liu S C, Dickinson R E 2002 J. Geophys. Res. 107 4142
[5]	James D K 1981 Appl. Opt. 20 211
[6]	Fiocco G, Dewolf J B 1968 J. Atmos. Sci. 25 488
[7]	Zhao M, Xie C B, Zhong Z Q, Wang B X, Wang Z Z, Dai P D, Shang Z, Tan M, Liu D, Wang Y J 2015 J. Opt. Soc. Korea 19 695
[8]	Cheng Z T, Liu D, Zhou Y D, Yang Y Y, Luo J, Zhang Y P, Shen Y B, Liu C, Bai J, Wang K W, Su L, Yang L M 2016 Opt. Lett. 41 3916
[9]	Shimizu H, Lee S A, She C Y 1983 Appl. Opt. 22 1373
[10]	Hair J W, Caldwell L M, Krueger D A, She C Y 2001 Appl. Opt. 40 5280
[11]	Liu J T, Chen W B, Song X Q 2010 Acta Opt. Sin. 30 1548 (in Chinese) [刘金涛, 陈卫标, 宋小全 2010 光学学报 30 1548]
[12]	Su W Y, Schuster G L, Loeb N G, Rogers R R, Ferrare R A, Hostetler C A, Hair J W, Obland M D 2008 J. Geophy. Res. Atmos. 113 202
[13]	Rogers R R, Hostetler C A, Hair J W, Ferrare R A, Liu Z, Obland M D, Harper D B, Cook A L, Powell K A, Vaughan M A, Winker D M 2011 Atmos. Chem. Phys. 11 1295
[14]	Hoffman D S, Repasky K S, Reagan J A, Carlsten J L 2012 Appl. Opt. 51 6233
[15]	Imaki M, Takegoshi Y, Kobayashi T 2005 Jpn. J. Appl. Phys. 44 3063
[16]	Di H G, Zhang Z F, Hua H B, Zhang J Q, Hua D X, Wang Y F, He T Y 2017 Opt. Express 25 5068
[17]	Hua D X, Uchida M, Kobayashi T 2004 Opt. Lett. 29 1063
[18]	Jin Y, Sugimoto N, Nishizawa T, Ristori P, Otero L 2016 Proceeding of the 27th International Laser Radar Conference New York City, USA, July 5-10, 2015 p02006
[19]	Ristori P, Otero L, Jin Y, Sugimoto N, Nishizawa T, Quel E 2016 Proceeding of the 27th International Laser Radar Conference New York City, USA, July 5-10, 2015 p06005
[20]	Cheng Z T, Liu D, Zhang Y P, Liu C, Bai J, Wang D, Wang N C, Zhou Y D, Luo J, Yang Y Y, Shen Y B, Su L, Yang L M 2017 Opt. Express 25 979
[21]	Liu Z Y, Kobayashi T 1996 Opt. Rev. 3 47

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