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Proceedings Paper

Digitally controlling the 'twist' of light
Author(s): A. Dudley; A. Forbes
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Paper Abstract

An overview of the work done within the Mathematical Optics group at the CSIR’s National Laser Centre will be presented. We will focus on our work done in laser beam shaping with the use of digital holograms for the generation of superimposed optical fields which carry orbital angular momentum (OAM) and the development of OAM measurement techniques. Since OAM offers a potentially infinite-dimensional state space, much interest has been generated in its measurement for higher-dimensional quantum information processing to be realised. We generate superpositions of higher-order Bessel beams and show that even though we can create a field which carries no overall OAM, we can still witness an angular rotation in the intensity profile of the beam. We also develop a new OAM measurement technique by means of digital holograms.

Paper Details

Date Published: 22 August 2014
PDF: 6 pages
Proc. SPIE 9286, Second International Conference on Applications of Optics and Photonics, 92864S (22 August 2014); doi: 10.1117/12.2063073
Show Author Affiliations
A. Dudley, CSIR National Laser Ctr (South Africa)
A. Forbes, CSIR National Laser Ctr. (South Africa)

Published in SPIE Proceedings Vol. 9286:
Second International Conference on Applications of Optics and Photonics
Manuel Filipe P. C. Martins Costa; Rogério Nunes Nogueira, Editor(s)

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