3.66μm激光外差光谱仪设计与水汽柱浓度反演
投稿时间:2019-12-10  修订日期:2020-08-18  点此下载全文
引用本文:黄俊,黄印博,卢兴吉,曹振松,谈图,刘丹丹.3.66μm激光外差光谱仪设计与水汽柱浓度反演[J].红外与毫米波学报,2020,39(5):612~620].HUANG Jun,HUANG Yin-Bo,LU Xing-Ji,CAO Zhen-Song,TAN Tu,LIU Dan-Dan.Design of 3.66 μm laser heterodyne spectrometer and retrieval of water vapor column concentration[J].J.Infrared Millim.Waves,2020,39(5):612~620.]
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作者单位E-mail
黄俊 中国科学院安徽光学精密机械研究所 中国科学院大气光学重点实验室 hungjune@mail.ustc.edu.cn 
黄印博 中国科学院安徽光学精密机械研究所 中国科学院大气光学重点实验室  
卢兴吉 中国科学院安徽光学精密机械研究所 中国科学院大气光学重点实验室 lxj168@mail.ustc.edu.cn 
曹振松 中国科学院安徽光学精密机械研究所 中国科学院大气光学重点实验室  
谈图 中国科学院安徽光学精密机械研究所 中国科学院大气光学重点实验室  
刘丹丹 中国科学院安徽光学精密机械研究所 中国科学院大气光学重点实验室  
基金项目:中国科学院战略性先导科技专项(A 类) XDA17010104;中国科学院青年创新促进会 2015264┫资助课题中国科学院战略性先导科技专项(A 类)(XDA17010104);中国科学院青年创新促进会(2015264)资助课题
中文摘要:激光外差光谱测量技术具有光谱分辨率高、探测灵敏度高、成本低等特点,近年来在温室气体探测、激光大气传输等领域得到了广泛的应用。以3.66 μm 分布反馈式带间级联激光器作为本振光源搭建了一套高分辨率激光外差太阳光谱测量装置,实现了水汽吸收光谱的实时测量,并利用最优估算法对整层大气中的水汽柱浓度进行了反演,得到合肥地区2019年5月22日和23日的水汽柱浓度。反演结果与同步进行观测的傅里叶变换光谱仪EM27/SUN测量结果变化趋势一致,相关性优于0.8,偏差小于15%。研究结果表明,搭建的激光外差测量装置能够实现大气中水汽吸收光谱的实时测量以及水汽柱浓度的精确反演,同时为后续的水汽浓度廓线测量与研究奠定了基础。
中文关键词:激光外差  太阳光谱  最优估算法  水汽柱浓度
 
Design of 3.66 μm laser heterodyne spectrometer and retrieval of water vapor column concentration
Abstract:Laser heterodyne spectroscopy has been widely used in greenhouse gas detection and laser atmospheric transmission in recent years, because of its high spectral resolution, simple structure and low cost. A laser heterodyne spectrum detection system using 3.66 μm DFB laser as local oscillator source is designed. The real-time and accurate measurements of water vapor absorption spectrum in the whole atmosphere are also realized. Furthermore, the signal-to-noise ratio after 12 averaging is 160.4, and the spectral resolution is 0.009 cm-1. The average values of water vapor column concentration in Hefei on May 22 and 23 were 1549 ppmv and 1730 ppmv respectively. The analysis of correlationship indicated that Compared with EM27/SUN measured by Fourier Transform Spectrometer, the correlation is 0.895 and 0.819 respectively, and the deviation is 14.2% and 11.2% respectively. With the design and research of the system, the real-time measurements of the solar absorption spectrum of water vapor in the atmosphere and the precise inversions of water vapor column density are realized, which lays a foundation for more accurate detection and concentration inversion of the absorption spectrum of water vapor and its isotope HDO.
keywords:Laser Heterodyne  Solar Spectrum  Optimal Estimation Method  Water Vapor Column Concentration
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