摘要
基于大气分层理论,分析了临近空间环境的特性,同时利用Beer定律和Markov模型分别对激光在临近空间中传输的衰减效应和湍流效应进行了计算和仿真。结果表明:O3分子的吸收、气溶胶粒子的散射和高空大气分子的散射是造成激光衰减的主要因素,30km高空以上激光已很少受到湍流效应的影响,并且常用的1.06μm激光比10.6μm激光的光强闪烁小,更适于在临近空间中进行传输。
Based on the theory of the atmosphere delamination,the characteristics of the near space＇ environment have been analyzed, at the same time, the Beer law and the model of the Markov are respectively used to calculate and emulate the attenuation and the turbulence in the propagation of laser beam through the near space. It has been proved that the absorbtion of the O3 , the scattering of the aerosol and the rayleigh scattering of the upper air molecules are the main factors to the attenuation of the laser,the laser in 30km high altitude has been hardly influenced by the turbulence,and the common-used 1.06μm＇s irradiance scintillation is less than the 10.6μm laser and is more suitable for transmiting in the near space.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第12期1188-1191,共4页
Laser & Infrared
基金
国家高技术发展研究计划863项目(No.2007AA01Z294)资助
关键词
临近空间
激光衰减
大气湍流
折射率结构常数
near space
laser attenuation
atmosphere turbulence i refractive index structure
