Author Affiliations
Abstract
1 Southwest Institute of Technical Physics, Chengdu 610041, China
2 Science College, Civil Aviation Flight University of China, Guanghan 618307, China
3 Lidar and Device Laboratory, Southwest Institute of Technical Physics, Chengdu 610041, China
4 Key Laboratory of Laser Device Technology of China North Industries Group Corporation Limited, Chengdu 610041, China
5 China Research and Development Academy of Machinery Equipment, Beijing 100089, China
Coherent lidar (CL) addresses existing constraints in CL data products by enabling simultaneous observation of multiple meteorological parameters such as cloud height, extinction coefficient, aerosol concentration, and wind field evaluation. A detailed analysis of CL echo signals was performed at a wavelength of 1550 nm, enabling accurate measurements of cloud height and aerosol concentration. Extensive data analyses and validation tests were conducted, aligning them with a 532 nm direct aerosol lidar (AL). The assessments of the aerosol extinction coefficient demonstrated notable consistency. This underscores the potential of advanced CL for providing prolonged and consistent observations across diverse meteorological conditions.
coherent lidar aerosol extinction coefficient aerosol concentration wind Chinese Optics Letters
2025, 23(1): 011203
1 中国辐射防护研究院环境工程技术研究所, 山西 太原 030006
2 山西大学激光光谱研究所量子光学与光量子器件国家重点实验室, 山西 太原 030006
3 山西大学极端光学协同创新中心, 山西 太原 030006
基于近前向光散射法, 实现了多分散亚微米级气溶胶的浓度测量。测量装置采用卤钨灯作为光源, 整形后的环状光束被会聚至待测气体处, 散射光经透镜收集后, 由光电探测器进行探测, 分析探测光强度的变化, 从而反演出被测气溶胶的浓度。实验结果表明, 该测量方法的探测灵敏度能够达到10-4 μg·L-1, 线性响应范围覆盖了6个数量级。该方法可应用于核工业、医药、微电子等领域。
散射 气溶胶浓度测量 近前向散射 灵敏度 线性响应范围 激光与光电子学进展
2017, 54(9): 092901
中国科学院安徽光学精密机械研究所, 安徽 合肥 230031
从湍流大气中粒子运动方程出发,探讨粒子运动与大气湍流之间存在的相互关系,结果表明粒子运动张弛时间τ值越大,粒子惯性的相对作用就越大,大气湍流越难带动粒子,此时粒子运动与大气运动的差别越大。采用物理图像分析,建立简单的数学模型,求解并获得了有限空间气溶胶浓度场函数表达式,并进行相应的数值分析。根据短时间内能见度仪的实验探测数据,得知在光的传输路径上,大气气溶胶浓度场的变化将对光的强度、相位的起伏造成影响。
大气光学 光传输 气溶胶浓度场 大气湍流扩散
