Abstract

Generally, the eddy diffusivity ratio of salinity to temperature is not equal to one, especially in the upper and mid-to-high latitude ocean. In this paper, the performance of practical underwater optical communication (UOC) systems is investigated by considering the influence of the eddy diffusivity ratio other than one. Specifically, using the Rytov theory in weak turbulence, the aperture-averaged scintillation indices for the plane and spherical waves are derived. The typical performance criteria including the mean signal-to-noise ratio and bit error rate are further studied. It is found that the scintillation index and the associated UOC performance differ between the cases of the unity and variable eddy diffusivity ratio. Such a difference becomes smaller as the receiving aperture increases.

© 2018 Optical Society of America

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