大气中激光散射信号的特征分析  

Analysis of the Signal's Feature Corresponding to Laser Scattering in the Air

作　　者：王龙[1] 张国俊[1] 邹继伟[1] 孙晓泉[1] 

机构地区：[1]电子工程学院,合肥230037

出　　处：《应用激光》2002年第5期487-490,共4页Applied Laser

摘　　要：利用米氏散射理论,对1.06μm脉冲激光在低空大气中传输时的辐照度的分布进行了理论分析和数值计算,得到了都市郊区大气模型条件下,不同离轴距离时辐照度随时间的变化曲线,并对其峰值位置随离轴距离的变化进行了数值分析。进一步的数值分析表明,脉冲激光在传输过程中出现最大辐照度的位置距出口的距离与离轴距离成反比关系。在分析散射信号时域特征的基础上,对利用该特征对激光光源的定向可行性进行了初步探讨,认为单个探测器难以实现对激光源的定向,因此提出了用多个散射探测器对激光源进行定向的方法。The distribution of the scattering signal's irradiance of 1. 06μm laser in atmosphere is calculated by u-sing Mie's scattering theory. The distribution curve of the irradiance along laser beam is given in the low atmospheric model. Through the analysis, the conclusion is gotten that the distance between the point of the maximal irradiance and the laser is inverse relation with the abaxial distance of the detector and it is difficult to orient the laser by one detector, it should use several detectors.

关 键 词：激光告警 大气散射 截获 无源定位 辐照度 

分 类 号：P422.3[天文地球—大气科学及气象学]