光学精密工程2018，Vol.26Issue(2)：253-260,8.DOI:10.3788/OPE.20182602.0253
差分吸收NO2激光雷达波长漂移和能量波动对浓度反演的影响
Effects of wavelength shift and energy fluctuation on inversion of NO2differential absorption lidar
摘要
Abstract
To evaluate the effect of the stability of the laser on the inversion of the NO2distribution in differential absorption based on the NO2absorption spectrum and the lidar equation.The relative er-rors caused by wavelength shift and energy fluctuation in the range resolved differential absorption li-dar were analyzed.Two Nd:YAG lasers are used to pump into two dye lasers to produce two wave-lengths,λon(448.1 nm)and λoff(446.6 nm),respectively.In the absence of frequency and power sta-bility conditions,the influence of the change of NO2absorption cross section caused by wavelength drift on the inversion concentration was analyzed.When the two wavelengths'drift is less than 0.005 nm,the total relative error of inversion concentration due to λonand λoffwavelength drift is less than 3%,and λondrift is the main factor.Then the influence of energy fluctuation on the inversion concen-tration is analyzed.T he results show that the energy fluctuation has no effect on the inversion concen-tration,but the energy reduction will increase the statistical error.When the energy fluctuates in a range of 5% or less,detection range decreases about 100 meters.Lastly,the vertical or horizontal NO2profiles were measured at range of 0.5 km to 3.0 km.This method provides theoretical basis and technical support for the design and application of practical NO2differential absorption lidar.关键词
激光雷达/差分吸收光谱/二氧化氮/波长漂移/能量波动Key words
lidar/differential absorption spectrum/NO2/wavelength drift/energy fluctuation分类
信息技术与安全科学引用本文复制引用
刘秋武,陈亚峰,王杰,黄见,胡顺星..差分吸收NO2激光雷达波长漂移和能量波动对浓度反演的影响[J].光学精密工程,2018,26(2):253-260,8.基金项目
国家重大科研仪器设备研制专项(No.41127901) （No.41127901）
国家自然科学基金资助项目(No.41575032,No.41505019) （No.41575032,No.41505019）
