Keskin Aysan, Baykal Yahya
Appl Opt. 2021 Aug 20;60(24):7054-7063. doi: 10.1364/AO.428840.
Effects of source beam, link, and oceanic turbulence parameters on the scintillation index and bit error rate (BER) performance of cosine (cos) and cosine-hyperbolic (cosh) Gaussian light beams have been investigated in order to improve wireless optical communication link performance in oceanic turbulence. The Nikishov and Nikishov power spectrum of oceanic water and extended Huygens Fresnel principle were used in our evaluations; the results were obtained via MATLAB. The scintillation index and BER were examined versus oceanic turbulence parameters, which are the rate of dissipation of mean-square temperature, the ratio of temperature and salinity contributions to the refractive index spectrum, and the dissipation rate of kinetic energy per unit fluid mass of fluid. Further, the scintillation index and BER are investigated against the source size, propagation distance, and complex displacement parameters of cos- and cosh-Gaussian beams. This study aimed to select the suitable sinusoidal beam to be employed in order to increase the performance of underwater wireless optical communication systems operating in oceanic turbulence.
为了提高海洋湍流环境下无线光通信链路的性能，研究了源光束、链路和海洋湍流参数对余弦（cos）高斯光束和双曲余弦（cosh）高斯光束的闪烁指数和误码率（BER）性能的影响。我们的评估中使用了海水的尼基肖夫功率谱和扩展的惠更斯-菲涅耳原理；结果通过MATLAB获得。研究了闪烁指数和误码率与海洋湍流参数的关系，这些参数包括均方温度耗散率、温度和盐度对折射率谱贡献的比值以及单位流体质量流体的动能耗散率。此外，还针对cos-高斯光束和cosh-高斯光束的源尺寸、传播距离和复位移参数研究了闪烁指数和误码率。本研究旨在选择合适的正弦光束，以提高在海洋湍流中运行的水下无线光通信系统的性能。
