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Proceedings Paper

Transverse energy redistribution upon edge diffraction of a paraxial laser beam with optical vortex
Author(s): Aleksandr Bekshaev; Kadhim Ameen Mohammed
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Paper Abstract

We present the results of the numerical investigation of the transverse profile evolution for a beam obtained by the edge diffraction of a circular Laguerre-Gaussian mode. It is shown that the energy penetrates into the geometric shadow region asymmetrically, which testifies for the transverse energy circulation in the incident beam. The intensity profile shows the “overall” rotation in agreement with the energy circulation handedness. The phase profile of the diffracted beam is characterized by the system of singularities (optical vortices) that migrate over the beam cross section and participate in topological reactions of emergence and/or annihilation. In the far field, the beam profile structure is simplified and becomes symmetric with respect to the axis orthogonal to the screen edge. No matter which part of the Laguerre-Gaussian beam is stopped by the screen, the far-field profile contains the optical vortex of the same sense as the incident one.

Paper Details

Date Published: 17 December 2013
PDF: 10 pages
Proc. SPIE 9066, Eleventh International Conference on Correlation Optics, 906602 (17 December 2013); doi: 10.1117/12.2050875
Show Author Affiliations
Aleksandr Bekshaev, Odessa I.I. Mechnikov National Univ. (Ukraine)
Kadhim Ameen Mohammed, Odessa I.I. Mechnikov National Univ. (Ukraine)

Published in SPIE Proceedings Vol. 9066:
Eleventh International Conference on Correlation Optics
Oleg Vyacheslavovich Angelsky, Editor(s)

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