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Proceedings Paper

Measurement of the orbital angular momentum of an optical beam with the help of space-angle intensity moments
Author(s): Alexander Ya. Bekshaev; Andriy Yurievich Popov
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Paper Abstract

An orbital angular momentum (OAM) of the optical beam is shown to be reflected in the special structure of its matrix of space-angle intensity moments. Considering the properties of these moments and their transformations, a conclusion has been made that any light beam with the OAM experiences a characteristic transverse shift during its interaction with a plane boundary or a diffraction grating. On this base, a method for the immediate measurement of the beam OAM is proposed. The simple experimental arrangement for such a measurement includes a self-collimating diffraction grating, a position-sensitive quadrant photodetector and a device for the beam rotation around its longitudinal axis.

Paper Details

Date Published: 5 February 2002
PDF: 9 pages
Proc. SPIE 4607, Selected Papers from Fifth International Conference on Correlation Optics, (5 February 2002); doi: 10.1117/12.455175
Show Author Affiliations
Alexander Ya. Bekshaev, Univ. Instelling Antwerpen and Odessa National Univ. (Ukraine)
Andriy Yurievich Popov, Odessa National Univ. (Ukraine)

Published in SPIE Proceedings Vol. 4607:
Selected Papers from Fifth International Conference on Correlation Optics
Oleg V. Angelsky, Editor(s)

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