Optimal transport theory for processing and classifying OAM superpositions distorted by turbulence

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Scopus citations

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.

Original languageEnglish
Title of host publicationLaser Communication and Propagation through the Atmosphere and Oceans XI
EditorsJaime A. Anguita, Jeremy P. Bos, David T. Wayne
PublisherSPIE
Pages8
ISBN (Electronic)9781510654587
ISBN (Print)9781510654587
DOIs
StatePublished - 2022
EventLaser Communication and Propagation through the Atmosphere and Oceans XI 2022 - San Diego, United States
Duration: 22 Aug 202223 Aug 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12237
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceLaser Communication and Propagation through the Atmosphere and Oceans XI 2022
Country/TerritoryUnited States
CitySan Diego
Period22/08/2223/08/22

Bibliographical note

Publisher Copyright:
© 2022 SPIE.

Keywords

  • FSO communications
  • Wasserstein distance
  • optimal transport
  • orbital angular momentum
  • turbulence-induced distortions

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