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Proceedings Paper

Efficient sorting of Bessel beams
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Paper Abstract

A procedure to efficiently sort orbital angular momentum (OAM) states of light, by performing a Cartesian to log-polar coordinate transformation which translates helically phased beams into a transverse phase gradient, currently exists1. We implement this mode transformer, which comprises of two custom refractive optical elements2, to efficiently sort Bessel beams carrying OAM. Introducing two cylindrical lenses, allows the focusing of each of the input OAM Bessel states to a different lateral position in the Fourier plane and separates the radial wave-vectors in the image-plane. We demonstrate the concept by separating over forty OAM states and radial wave-vectors.

Paper Details

Date Published: 5 March 2013
PDF: 9 pages
Proc. SPIE 8637, Complex Light and Optical Forces VII, 86371C (5 March 2013); doi: 10.1117/12.2004305
Show Author Affiliations
T. Mhlanga, CSIR National Laser Ctr. (South Africa)
Stellenbosch Univ. (South Africa)
A. Dudley, CSIR National Laser Ctr. (South Africa)
A. McDonald, CSIR National Laser Ctr. (South Africa)
F. S. Roux, CSIR National Laser Ctr. (South Africa)
M. Lavery, Univ. of Glasgow (United Kingdom)
M. Padgett, Univ. of Glasgow (United Kingdom)
A. Forbes, CSIR National Laser Ctr. (South Africa)
Stellenbosch Univ. (South Africa)
Univ. of KwaZulu-Natal (United Kingdom)


Published in SPIE Proceedings Vol. 8637:
Complex Light and Optical Forces VII
Jesper Glückstad; David L. Andrews; Enrique J. Galvez, Editor(s)

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