激光能量穿过大气层的传输过程  

Laser Beam Propagation Process in Atmosphere

作　　者：高凤彬 赵长明[1] 关哲[1] 张海洋[1] 杨苏辉[1] 王予[1] 

机构地区：[1]北京理工大学光电学院,北京100081

出　　处：《激光与光电子学进展》2017年第4期226-232,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61378020)

摘　　要：空间太阳能电站(SSPS)方案之一是采用激光束实现天-地能量传输。研究激光能量传输的可行性,需要对激光束穿过大气层的过程进行分析。理论分析并数据模拟了激光在大气层中传输的过程,分析了大气在不同高度处对激光的作用,计算了不同高度处的激光光强和分布,同时分析了相应的大气温度和折射率的变化规律。研究发现,利用激光实现大气层垂直方向上的能量传输,需要控制激光的功率密度在一定范围,以减小能量的损失,同时避免对大气产生明显影响。在一定传输功率下,可以通过增加光束口径来减小激光的功率密度。One scheme of the space solar power station （SSPS） is based on the laser beam for energy transfer from space to the earth. In order to demonstrate the feasibility of laser energy transfer, the analysis of the propagation process of laser beam in atmosphere is needed. Modeling and simulating processes are conducted. We analyze the effect of atmosphere towards laser beam at different heights, simulate the intensity profile of laser beam, and discuss the change of atmospheric temperature and refractive index at different heights. The results show that in order to reduce influence of atmosphere and avoid energy loss, the laser power density should remain within a certain range. Increasing the laser beam size can reduce the laser power density at a certain power level.

关 键 词：激光光学 大气吸收系数 激光热晕效应 大气折射率分布 激光能量传输 

分 类 号：O436.2[机械工程—光学工程]