7-11 July 2014
Africa/Johannesburg timezone
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Propagation of vortex modes through fibres

Presented by Ms. Melanie MCLAREN on 10 Jul 2014 from 15:00 to 15:20
Type: Oral Presentation
Session: Photonics
Track: Track C - Photonics

Abstract

Spatial light modes that carry orbital angular momentum (OAM) have become popular within a range of optical fields; optical tweezing, microscopy, atom manipulation and quantum entanglement. These OAM modes span an infinite dimensional Hilbert space, offering an increase in the information capacity per photon for quantum communication. This obvious advantage over the 2-dimensional polarisation states is countered by the poor propagation of OAM modes through turbulent media such as the atmosphere. We therefore seek an alternative mode of propagation in the form of optical fibres. Multimode fibres suffer from strong intermodal coupling, which typically destroy the fragile quantum correlations carried by the spatially entangled state. We use classical back-projection as an experimental tool to study the effect of fibre transport on OAM modes. We show that our fibre system has the potential to transport high-dimensional entangled states.

Award

Yes

Level

PhD

Supervisor

Prof. Andrew Forbes, aforbes1@csir.co.za, CSIR

Paper

No

Place

Room: D Les 102


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