Analysis of modal crosstalk for communication in turbulent ocean using Lommel-Gaussian beam

We analyze OAM modal crosstalk of a Lommel-Gaussian beam induced by anisotropic oceanic turbulence. The theoretical model is constructed to illustrate the impacts of turbulence and beam parameters on the received crosstalk probability. Turbulence conditions with a larger inner-scale factor, larger anisotropic factor, higher dissipation rate of kinetic energy, lower dissipation rate of the mean-squared temperature, and smaller temperature-salinity contribution ratio usually cause smaller crosstalk. Due to its better immunity to turbulence interference, a Lommel-Gaussian beam with a small asymmetry factor, low OAM quantum number, optimum waist width, and long wavelength in the transmission window is preferable for application. The results are useful to improve OAM communication performances in oceanic turbulence. (C) 2017 Optical Society of America