【作者】 付强； 姜会林； 王晓曼； 刘智；

【Author】 Fu Qiang,Jiang Hui-lin,Wan Xiao-man,Liu Zhi(Institute of Space Photoelectric Technology,Changchun University of Science and Technology,Changchun 130022,China)

【机构】 长春理工大学空间光电技术研究所；

【摘要】 大气湍流对光传输产生光强闪烁、相畸变等效应,影响高速激光通信性能,本文运用Rytov近似方法在Kolmogorov折射率起伏功率谱下求解弱湍流光强闪烁模型,结合Andrews和Churnside推导的强湍流光强闪烁渐进分析模型,建立高速激光通信中光强闪烁与误码率的关系,并进行数值计算仿真,表明光强闪烁是造成误码率的主要因素,湍流强度越强、传输距离越长,光强闪烁越严重,误码率越大;同时利用研制的大气湍流模拟装置对光强闪烁、误码率等影响进行实验研究,数据结果与数值仿真结论相符合,为高速大气激光通信系统优化设计奠定基础。更多还原

【Abstract】 Optical transmission in atmospheric turbulence produces some effects which affect performances of the laser communication such as scintillation,distortion.This paper solved scintillation model in weak turbulence by intensity approximate method called Rytov in refractive index ups and downs power spectrum called Kolmogorov,combining with incremental analysis model of scintillation in strong turbulence by Andrews and Churnside,built the relationship between scintillation and BER in laser communication at high data rate,and calculated bynumerical simulation.It shows that scintillation is the main factor caused by BER,and the stronger the turbulence,the longer the transmission distance,the more serious scintillation,the greater the BER.At the same time,using atmospheric turbulence simulation device,experimental researches on influence of laser communication at high data rate was made.Experimental data and numerical simulation conclusion is consistent,lay the foundation for optimization design of laser communication system at high data rate in atmosphere.更多还原