摘要
针对直接探测长程CO2 差分吸收激光雷达系统 ,分析了对测量灵敏度产生影响的两个主要因素 :大气湍流和激光斑纹 ,得到了测量灵敏度与大气湍流和激光斑纹之间关系的数值计算结果。结果表明 ,在高度小于35 0m时 ,增加设备离地高度可以有效地提高测量灵敏度 ;在高度大于 35 0m后 ,改变系统参数可以有效地提高测量灵敏度。
For direct detection,long-range CO 2 differential absorption lidar (DIAL) system,two factors which have effects on measurement sensitivity:atmospheric turbulence and laser speckle are analyzed.Numerical calculation results of the dependent relationship between measurement sensitivity and atmospheric turbulence and laser speckle are obtained.These results show that when the height is smaller than 350m,measurement sensitivity can be efficiently improved by increasing the height of equipment above ground;when the height is bigger than 350m,measurement sensitivity can be efficiently improved by changing system parameters.
出处
《激光技术》
CAS
CSCD
北大核心
2004年第5期503-505,共3页
Laser Technology
关键词
差分吸收激光雷达
测量灵敏度
大气湍流
激光斑纹
differential absorption lidar(DIAL)
measurement sensitivity
atmospheric turbulence
laser speckle
