9-13 July 2012
Africa/Johannesburg timezone
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Generation of High Order Modes

Presented by Mr. Sandile NGCOBO on 11 Jul 2012 from 11:15 to 11:35
Type: Oral Presentation
Session: Photonics
Track: Track C - Photonics

Abstract

This work deals with the generation of symmetrical high order Laguerre Gaussian modes. These high order Laguerre-Gaussian beams are generated by forcing the laser using an annular binary Diffractive Optical Element whose geometry is in connection with the location of the Laguerre polynomial zeros. The Diffractive optical element is used to shape the TEM00 Gassian beam and force the laser to operate on a higher order TEMp0 Laguerre-Gaussian modes or high order superposition of Laguerre-Gaussian modes. In this presentation we will show some different methods that we have employed for generating these high order Laguerre Gaussian modes using annular binary Diffractive Optical Elements of multi rings and single ring method. The characterization of these high order Laguerre Gaussian modes using Fourier Transformation, Modal Decomposition Method and Beam quality factor M2 measurements will show that they are of high purity.

Award

Yes

Level

PhD

Supervisor

Prof. Andrew Forbes aforbes@csir.co.za

Paper

No

Place

Location: IT 4-5


Primary authors

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