33
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Date
33
Authors
Cisternas, Jaime E.
Anguita, Jaime A.
Journal Title
Journal ISSN
Volume Title
Publisher
33
Abstract
We propose the use of orbital angular momentum (OAM) states to form modulation symbols in a free-space laser communication link affected by atmospheric turbulence. A collection of superpositions of 2 and 4 active OAM modes are used for transmitting digital information. To sense and decode the data we compare three candidate architectures, based on a Mode Sorter, a Shack-Hartmann and phase flattening holograms. In this work we use concepts of Optimal Transport, particularly the Wasserstein distance and barycenter, for an optimal selection of OAM superpositions and a more appropriate processing of OAM spectra, leading to more accurate detection, achieving a classification error smaller than 1/1000 in intermediate to strong turbulence conditions.
Description
Keywords
FSO communications, Wasserstein distance, optimal transport, orbital angular momentum, turbulence-induced distortions
Citation
33