KEYWORDS: Atmospheric turbulence, Free space optical communications, Turbulence, System on a chip, Receivers, Modulation, Light sources, Electromagnetism, Correlation function, Americium
A significant limiting factor for orbital angular momentum (OAM) based free-space communication is the unavoidable signal degradation caused by atmospheric turbulence. Its main effect, in fact, is to induce crosstalk between the various OAM states, thus introducing additional noise and rendering the detection of different OAM states quite challenging. In this work, we consider partially coherent, self-focusing fields carrying OAM beams. We then compare their performance through turbulent atmosphere with that of perfectly coherent vortex beams. We show how the innate self-focusing character of partially coherent beams results in a better resilience against turbulence-induced noise than their coherent counterparts.
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