Optimal transport theory for processing and classifying OAM superpositions distorted by turbulence
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.
Más información
Título según WOS: | ID WOS:000878082900007 Not found in local WOS DB |
Título de la Revista: | FOURTEENTH INTERNATIONAL CONFERENCE ON MACHINE VISION (ICMV 2021) |
Volumen: | 12237 |
Editorial: | SPIE-INT SOC OPTICAL ENGINEERING |
Fecha de publicación: | 2022 |
DOI: |
10.1117/12.2633099 |
Notas: | ISI |