4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

The Wigner distribution function in modal characterisation

6 Jul 2016, 16:10
1h 50m
Kramer Law building

Kramer Law building

UCT Middle Campus Cape Town
Board: C.263
Poster Presentation Track C - Photonics Poster Session (2)


Mr Prince Mredlana (CSIR National laser centre)

Main supervisor (name and email)<br>and his / her institution

Darryl Naidoo, dnaidoo3@csir.co.za, CSIR, National laser centre.

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

We investigate a novel approach to characterise an optical field employing a Wigner distribution function with a modal decomposition technique. Optical fields are typically characterised through their phase, beam size, far field beam divergence, beam quality and constituent modal components where a variety of measurement techniques are required to obtain the above parameters. These techniques include a modal decomposition that uses a superposition of orthogonal functions to determine constituent modal components and a knife-edge method to determine beam size by the use of a scanning slit and a detector. The use of the Wigner distribution function together with the modal decomposition is an approach to optimally obtain the various beam parameters in a single set of measurements. We demonstrate a mathematical representation of the approach and highlight the experimental procedure in modal characterisation.

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Primary author

Mr Prince Mredlana (CSIR National laser centre)


Prof. Andrew Forbes (CSIR) Dr Angela Dudley (CSIR National Laser Centre) Dr Cosmas Mafusire (University of Pretoria) Dr Darryl Naidoo (Council for Scientific and Industrial Research) Dr Tjaart Krüger (University of Pretoria)

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