Design of a compact setup to generate and test optical vortex beams
D. O. Pabon, S. A. Ledesma, G. F. Quinteiro, M. G. Capeluto
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Base Information
Volume
V50 - N3 / 2017 Ordinario
Reference
289-295
DOI
http://doi.org/10.7149/OPA.50.3.49030
Language
English
Keywords
optical vortex, computer generated holograms, fork hologram, orbital angular momentum, Mathieu beams
Abstract
We present a compact design to generate and test different vortex beams with orbital angular momentum (OAM). The design consists of a mask that contains both, a binary amplitude hologram and a pinhole. When the mask is illuminated and the pinhole is blocked, the hologram produces a vortex beam with OAM whose intensity distribution can be observed in the far field. When the pinhole is unblocked a reference wavefront is generated which allows testing interferometrically the spatial phase distribution of the beam. We numerically simulate the experiment for two kind of beams containing OAM: Laguerre-Gaussian like vortex beams and Mathieu beams.
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