雾霾对1.55μm激光传播衰减特性研究

Study on Attenuation Characteristics of Haze to 1.55μm Laser Propagation

大气对激光的衰减特性会使得自由空间光通信系统性能恶化。论文针对雾霾气溶胶进行理论建模。首先基于Christian Matzler包层散射理论建立雾霾气溶胶散射模型。其次,采用分层的数学思想构建激光沿任意路径的传播情况。当气溶胶之间的多重散射效应无法忽略时,结合蒙特卡洛法进行算法优化。然后采用PM2.5指数表征雾霾的强弱,并分析了其对1.55um激光的衰减特性,将仿真结果与主流经验公式Kruse进行比对,比对结果误差为3.69%。最后对理论建模进行实验比对,也验证了建模的准确性,为自由空间光通信的进一步优化奠定了理论基础。

The atmospheric attenuation of laser will deteriorate the performance of free space optical communication system.In this paper,a theoretical model of haze aerosol is established.Firstly,a haze aerosol scattering model is established based on Christian Matzler cladding scattering theory.Secondly,the propagation of laser along any path is constructed by layered mathemati⁃cal thought.When the multiple scattering effect between aerosols can not be ignored,the algorithm is optimized by Monte Carlo method.Then,PM2.5 index is used to characterize the haze intensity,and its attenuation characteristics for 1.55um laser are ana⁃lyzed.The simulation results are compared with the main empirical formula Kruse,and the error is 3.69%.Finally,the theoretical modeling is compared with the experimental results,and the accuracy of the modeling is verified,which lays a theoretical founda⁃tion for further optimization of free space optical communication.