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 language | English |
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Title of host publication | Laser Communication and Propagation through the Atmosphere and Oceans XI |
Editors | Jaime A. Anguita, Jeremy P. Bos, David T. Wayne |
Publisher | SPIE |
Pages | 8 |
ISBN (Electronic) | 9781510654587 |
ISBN (Print) | 9781510654587 |
DOIs | |
State | Published - 2022 |
Event | Laser Communication and Propagation through the Atmosphere and Oceans XI 2022 - San Diego, United States Duration: 22 Aug 2022 → 23 Aug 2022 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 12237 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Conference
Conference | Laser Communication and Propagation through the Atmosphere and Oceans XI 2022 |
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Country/Territory | United States |
City | San Diego |
Period | 22/08/22 → 23/08/22 |
Bibliographical note
Publisher Copyright:© 2022 SPIE.
Keywords
- FSO communications
- Wasserstein distance
- optimal transport
- orbital angular momentum
- turbulence-induced distortions