Higher-Order Spatial Modes in Turbulence: Alternatives to Orbital Angular Momentum

Mitchell A. Cox, Abderrahmen Trichili, Boon S. Ooi, Mohamed-Slim Alouini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effect of atmospheric turbulence on Orbital Angular Momentum (OAM) modes, which are a subset of the Laguerre-Gaussian (LG) modes, has been thoroughly studied. Other high-order basis sets such as Hermite-Gaussian (HG, which have a rectangular shape) and Ince-Gaussian modes (which have an elliptical shape) have received relatively little attention. In this work, comparative experimental measurements of low order OAM, Ince-, and Hermite-Gaussian modes in turbulence are presented. It is found that the performance of the mode sets vary dramatically in the same turbulence. Surprisingly, Ince-Gaussian modes experience lower crosstalk and mode dependent loss than LG and HG modes of similar order. This warrants further investigation: could there be an optimal basis set for optical communications in turbulence?
Original languageEnglish (US)
Title of host publication2021 IEEE International Conference on Communications Workshops (ICC Workshops)
PublisherIEEE
ISBN (Print)9781728194417
DOIs
StatePublished - Jun 2021

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