Generating and measuring non-diffracting vector Bessel beams

A. Dudley; Y. Li; T. Mhlanga; M. Escuti; A. Forbes

doi:10.1117/12.2038372

25 February 2014 Generating and measuring non-diffracting vector Bessel beams

A. Dudley, Y. Li, T. Mhlanga, M. Escuti, A. Forbes

Proceedings Volume 8999, Complex Light and Optical Forces VIII; 89990K (2014) https://doi.org/10.1117/12.2038372
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

We demonstrate how to create non-diffracting vector Bessel beams by implementing a spatial light modulator (SLM) to generate scalar Bessel beams which are then converted into vector fields by the use of an azimuthally-varying birefringent plate, known as a q-plate. The orbital angular momentum (OAM) of these generated beams is measured by performing a modal decomposition on each of the beam’s polarization components. This is achieved by separating the circular polarization components through a polarization grating (PG) before performing the modal decomposition. We investigate both single charged Bessel beams as well as superpositions and the results are in good agreement with theory.

Citation Download Citation

A. Dudley, Y. Li, T. Mhlanga, M. Escuti, and A. Forbes "Generating and measuring non-diffracting vector Bessel beams", Proc. SPIE 8999, Complex Light and Optical Forces VIII, 89990K (25 February 2014); https://doi.org/10.1117/12.2038372

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