Influence of eddy diffusivity ratio on Gaussian beam under weak to strong oceanic turbulence

Abstract

ABSTRACTThe oceanic turbulence refraction power spectrum model with a function of the eddy diffusivity ratio is adopted. By using the Rytov method, the scintillation index (SI) is derived using the aperture averaging technique for Gaussian beam under weak to strong oceanic turbulence. Variations of the SI in weak to strong oceanic turbulence are evaluated versus link length and the oceanic turbulence parameters such as the ratio of temperature to salinity contributions to the refractive index spectrum, the rate dissipation of the mean squared temperature, and the rate of dissipation of kinetic energy per unit mass of fluid. Considering the eddy diffusivity ratio of salinity to temperature, the effects of the ratio of temperature to salinity contributions to the refractive index spectrum on the performance of underwater wireless optical communication (UWOC) systems in weak to strong turbulence are analysed.