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Appl Opt. 2013 Mar 20;52(9):1888-91. doi: 10.1364/AO.52.001888.

Direct generation of abruptly focusing vortex beams using a 3/2 radial phase-only pattern.

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San Diego State University, Department of Physics, San Diego, California 92182-1233, USA.


Abruptly focusing Airy beams have previously been generated using a radial cubic phase pattern that represents the Fourier transform of the Airy beam. The Fourier transform of this pattern is formed using a system length of 2f, where f is the focal length of the Fourier transform lens. In this work, we directly generate these abruptly focusing Airy beams using a 3/2 radial phase pattern encoded onto a liquid crystal display. The resulting optical system is much shorter. In addition, we can easily produce vortex patterns at the focal point of these beams. Experimental results match theoretical predictions.

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