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采用功率谱反演法与叠加低频谐波方式数值模拟静态湍流相位屏,并根据湍流冻结理论仿真了动态湍流相位屏。采用液晶空间光调制器(LC-SLM)在实验室内搭建了大气湍流信道仿真平台,进行了Kolmogorov湍流模型下,不同湍流强度的激光大气传输模拟研究,对比分析了实验结果,与理论较为符合。同时实验研究了不同模拟湍流强度下激光通信误码率的响应关系,这对实验室内评估实际激光通信系统的性能具有重要应用价值。
The static turbulent phase screen is numerically simulated by power spectral inversion and superposition of low frequency harmonics, and the dynamic turbulent phase screen is simulated based on turbulent freezing theory. Atmospheric turbulence channel simulation platform was set up in the laboratory by liquid crystal spatial light modulator (LC-SLM), and the simulation of laser atmospheric transmission with different turbulence intensity under Kolmogorov turbulence model was carried out. The experimental results were compared with the theoretical ones . At the same time, the response relationship of laser communication bit error rate under different simulated turbulence intensities is experimentally studied, which has important application value in the laboratory to evaluate the performance of practical laser communication system.