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Proceedings Paper

Edge diffraction of optical-vortex beams formed by means of the fork hologram
Author(s): Aleksey Chernykh; Aleksandr Bekshaev; Anna Khoroshun; Lidiya Mikhaylovskaya; Aleksandr Akhmerov; Kadhim Ameen Mohammed
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Paper Abstract

We present the experimental and numerical study of the transverse profile for a beam obtained by the screen-edge diffraction of optical-vortex (OV) Kummer beams with topological charges 1, 2 and 3, generated with the help of a “fork” hologram. The main results concern the behavior of the secondary OVs formed in the diffracted beam due to splitting of the incident multicharged OV into a set of single-charged ones. When the screen edge moves across the incident beam, OVs in every cross section of the diffracted beam describe complicated spiral-like trajectories, which distinctly manifests the screw-like nature and the energy circulation in the OV beam. At certain conditions, positions of the separate OVs as well as their mutual configuration (singular skeleton of the diffracted beam) shows high sensitivity to the screen edge dislocation with respect to the incident beam axis. This can be used for remote measurements of small displacements and deformations.

Paper Details

Date Published: 30 November 2015
PDF: 9 pages
Proc. SPIE 9809, Twelfth International Conference on Correlation Optics, 980902 (30 November 2015); doi: 10.1117/12.2220398
Show Author Affiliations
Aleksey Chernykh, East Ukrainian National Univ. (Ukraine)
Aleksandr Bekshaev, Odessa I.I. Mechnikov National Univ. (Ukraine)
Anna Khoroshun, East Ukrainian National Univ. (Ukraine)
Lidiya Mikhaylovskaya, Odessa I.I. Mechnikov National Univ. (Ukraine)
Aleksandr Akhmerov, Odessa I.I. Mechnikov National Univ. (Ukraine)
Kadhim Ameen Mohammed, Odessa I.I. Mechnikov National Univ. (Ukraine)

Published in SPIE Proceedings Vol. 9809:
Twelfth International Conference on Correlation Optics
Oleg V. Angelsky, Editor(s)

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