相干多普勒激光测风雷达系统研究

大气中风速和风场分布的精确测量具有重要的军用和民用价值。近20年来,相干激光雷达对风场的遥测被经常用于大气边界层风场的精确测量。首先介绍了相干激光测风雷达的工作原理;然后对其相关的指标体系进行了详细的分析和论证,主要包括工作波长、探测灵敏度、测速精度以及作用距离与发射功率的关系等技术指标;最后给出了目前较优的相干激光测风雷达系统的技术方案和技术途径。在此基础上,采用1.5μm窄线宽激光光源设计了一套全固态、小型化激光相干测风实验装置,并进行了相关实验。

Index system of coherence Doppler wind lidar

Accurate measurement of wind velocity and wind field is very important in military and civil applications.During the last 20 years,coherence laser radar is useful for the remote range-resolved measurement of atmospheric winds,it was used for many wind related measurements in the atmospheric boundary layer.Firstly,the principle of coherent wind lidar is introduced. Secondly,the index system of coherent wind lidar is analyzed and demonstrated. Finally,the better technology scheme and technology route are proposed. Based on the scheme,the prototype of all solid-state and compact coherent wind lidar is designed with 1.5μm laser,and some experiments are carried out.