Design of a compact setup to generate and test optical vortex beams

G. QUINTEIRO; S. A. LEDESMA; D. PABON; M. G. CAPELUTO

Conferencia; IX Reunión Iberoamericana de Óptica / XII Reunión Iberoamericana de Óptica, Láseres y Aplicaciones; 2017

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, abinary 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 thepinhole 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