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

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