Open AccessDesigning laser beams carrying OAM for a high-performance underwater communication system
Author(s) -
Svetlana Avramov-Zamurovic,
Abbie T. Watnik,
J. R. Lindle,
K. Peter Judd
Publication year - 2020
Publication title -
journal of the optical society of america. a, optics, image science, and vision./journal of the optical society of america. a, online
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.803
H-Index - 158
eISSN - 1520-8532
pISSN - 1084-7529
DOI - 10.1364/josaa.388370
Subject(s) - underwater , beam (structure) , intensity (physics) , optics , set (abstract data type) , cluster analysis , laser , computer science , angular momentum , matching (statistics) , optical communication , physics , gaussian , artificial intelligence , mathematics , statistics , oceanography , quantum mechanics , programming language , geology
We present a design methodology for creating a distinct laser beam set suitable for detection by using only the recorded intensity pattern. We consider four coherent Laguerre-Gaussian beams carrying orbital angular momentum (OAM) to form the basis for optical communication. The complex electric fields of the beams are superimposed to create 16 dissimilar intensity patterns. The presented beam set design method considers the beam generation hardware limitations and aims to minimize the correlation among the messages and maximize their intensity differences. After propagating the 16 messages through a water channel, we measured high correlation, intensity similarity, and R-squared values for the identical messages and low values for the different ones. Distinct clustering between the measurements for the matching messages and the rest allows us to set a threshold in the gap among the groupings and successfully classify the received images.