Efficient sorting of Bessel beams

T. Mhlanga; A. Dudley; A. McDonald; F. S. Roux; M. Lavery; M. Padgett; A. Forbes

doi:10.1117/12.2004305

5 March 2013 Efficient sorting of Bessel beams

T. Mhlanga, A. Dudley, A. McDonald, F. S. Roux, M. Lavery, M. Padgett, A. Forbes

Proceedings Volume 8637, Complex Light and Optical Forces VII; 86371C (2013) https://doi.org/10.1117/12.2004305
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

Citation Download Citation

T. Mhlanga, A. Dudley, A. McDonald, F. S. Roux, M. Lavery, M. Padgett, and A. Forbes "Efficient sorting of Bessel beams", Proc. SPIE 8637, Complex Light and Optical Forces VII, 86371C (5 March 2013); https://doi.org/10.1117/12.2004305

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