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

Digitally transforming high-order mode to a high brightness beam

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

Kramer Law building

UCT Middle Campus Cape Town
Board: C.441
Poster Presentation Track C - Photonics Poster Session (2)

Speaker

Mr Sandile Ngcobo (CSIR)

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In this paper we demonstrate the superresolution technique of transforming a pure high order LGpl or HGml modes into a Gaussian intensity distribution at the plane of a converging lens. The high order modes are generated by encoding a digital amplitude hologram mask that contains absorbing rings match the Laguerre polynomial p and l zeros or the Hermite polynomial m and l zeros on a spatial light modulator (SLM) that acts as end-mirror of the resonator. The transformation is achieved by encoding an annular binary diffractive optical element on a second SLM as a digital hologram with a transmittance that has +1 or -1 which coincide with the dark and bright parts of the incident beams. It is envisaged that the transformed beam at the focus of the lens will have a focal volume and a profile that is similar to a Gaussian beam.

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