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Detection strategies for an optical communication system using Gaussian vortex beams.

In this paper, we describe the details of different detection strategies of a communication system using Gaussian vortex beams. These are listed as (a) simultaneous transmission of actual data symbol and reference signals (no multiplexing), (b) transmission of data symbol and reference signals in a wavelength division multiplexed manner, and (c) transmission of data symbol and reference signals in a time-division multiplexed manner. The performance of each one is evaluated for strong turbulence regimes with the help of an appropriately arranged random phase screen setup. It is found that the first two detection strategies work error-free within the source and propagation parameters chosen. In the last detection strategy, performance depends on the transverse wind velocity.