Cheng Mingjian, Guo Lixin, Zhang Yixin
Opt Express. 2015 Dec 14;23(25):32606-21. doi: 10.1364/OE.23.032606.
Analytic expression of the receiver-aperture-averaged scintillation index (SI) was derived for Gaussian-beam waves propagating through non-Kolmogorov maritime atmospheric environment by establishing a generalized maritime atmospheric spectrum model. The error performance of an intensity-modulated and direct-detection (IM/DD) free-space optical (FSO) system was investigated using the derived SI and log-normal distribution. The combined effects of non-Kolmogorov power-law exponent, turbulence inner scale, structure parameter, propagation distance, receiver aperture, and wavelength were also evaluated. Results show that inner scale and power-law exponent obviously affect SI. Large wavelength and receiver aperture can mitigate the effects of turbulence. The proposed model can be evaluated ship-to-ship/shore FSO system performance.
通过建立广义海洋大气谱模型，推导了高斯光束在非柯尔莫哥洛夫海洋大气环境中传播时接收孔径平均闪烁指数（SI）的解析表达式。利用推导得到的SI和对数正态分布研究了强度调制直接探测（IM/DD）自由空间光（FSO）系统的误差性能。还评估了非柯尔莫哥洛夫幂律指数、湍流内尺度、结构参数、传播距离、接收孔径和波长的综合影响。结果表明，内尺度和幂律指数对SI有明显影响。大波长和接收孔径可以减轻湍流的影响。所提出的模型可用于评估船对岸/船对船FSO系统的性能。
