22-30 July 2021
North-West University
Africa/Johannesburg timezone
More Information Coming Soon

On the interaction of structured light fields and the atmosphere

27 Jul 2021, 12:00
15m
Potchefstroom Campus (North-West University)

Potchefstroom Campus

North-West University

Oral Presentation Track C - Photonics Photonics

Speaker

Asher Klug (University of the Witwatersrand)

Description

It is well understood that structured light becomes distorted after propagating through the atmosphere. These distortions are the result of random refractive index fluctuations, themselves a product of atmospheric turbulence. In particular, these distortions have been realised as modal crosstalk in beams carrying orbital angular momentum. Such beams are ubiquitously used in free space optical communication applications. Commonly, the atmosphere is treated as a phase-only effect that induces this modal scattering. However, this approach offers little insight as it does not focus on the gain or loss of OAM that the beam experiences from interacting with the atmosphere. We ask the question: from where did the OAM come? We develop an alternate, novel model to provide generalised explanations to the sometimes-contested effects of atmospheric turbulence on light.

Apply to be considered for a student ; award (Yes / No)?

Yes

Level for award;(Hons, MSc, PhD, N/A)?

Msc

Primary authors

Asher Klug (University of the Witwatersrand) Isaac Nape (Structured Light Lab, School of Physics, University of Witwatersrand) Andrew Forbes (U. Witwatersrand)

Presentation Materials