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Proceedings Paper

Unveiling the radial modes in vortex beams (Conference Presentation)
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Paper Abstract

We present an experimental technique to generate partially coherent vortex beams with an arbitrary azimuthal index using only a spatial light modulator. Our approach is based on digitally simulating the intrinsic randomness of broadband light passing through a spiral phase plate. We illustrate the versatility of the technique by generating partially coherent beams with different coherence lengths and orbital angular momentum content, without any moving optical device. Consequently, we study its cross-correlation function in a wavefront folding interferometer. The comparison with theoretical predictions yields excellent agreement.

Paper Details

Date Published: 21 April 2017
PDF: 1 pages
Proc. SPIE 10090, Laser Resonators, Microresonators, and Beam Control XIX, 100901P (21 April 2017); doi: 10.1117/12.2252000
Show Author Affiliations
Prince Mredlana, Council of scientific and industrial research (South Africa)
Darryl Naidoo, Council for Scientific and Industrial Research (South Africa)
Cosmas Mafusire, Univ. of Pretoria (South Africa)
Angela Dudley, Council for Scientific and Industrial Research (South Africa)
Tjaart Krüger, Univ. of Pretoria (South Africa)
Andrew Forbes, Univ. of the Witwatersrand (South Africa)

Published in SPIE Proceedings Vol. 10090:
Laser Resonators, Microresonators, and Beam Control XIX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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