8-12 July 2013
Africa/Johannesburg timezone
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Azimuthal beam superpositions with intra-cavity rings

Presented by Mr. Darryl NAIDOO on 9 Jul 2013 from 17:40 to 18:40
Type: Poster Presentation
Session: Poster1
Track: Track C - Photonics

Abstract

We demonstrate the intra-cavity generation of a coherent superposition of Laguerre-Gaussian modes of zero radial order but opposite azimuthal order. The superposition is achieved through a set of amplitude rings in a diode-pumped solid-state resonator. By adjusting the number of rings and their thicknesses we can produce modes up to azimuthal order 12. To infer the purity of these modes we perform a full azimuthal modal decomposition by an inner product executed on a phase-only spatial light modulator. We also investigate if there is a phase difference between the Laguerre-Gaussian modes to identify if the phase difference is spatially or temporally dependent. A hallmark of a phase difference is the rotation of the field as the beam propagates into the far field or a rotation of the field at a fixed position over time.

Award

Yes

Level

PhD

Supervisor

Andrew Forbes, aforbes1@csir.co.za CSIR, University of Stellenbosch

Paper

No

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