Measurement of the orbital angular momentum of an optical beam with the help of space-angle intensity moments

Alexander Ya. Bekshaev; Andriy Yurievich Popov

doi:10.1117/12.455175

5 February 2002 Measurement of the orbital angular momentum of an optical beam with the help of space-angle intensity moments

Alexander Ya. Bekshaev, Andriy Yurievich Popov

Author Affiliations +

Proceedings Volume 4607, Selected Papers from Fifth International Conference on Correlation Optics; (2002) https://doi.org/10.1117/12.455175
Event: Fifth International Conference on Correlation Optics, 2001, Chernivsti, Ukraine

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.

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Alexander Ya. Bekshaev and Andriy Yurievich Popov "Measurement of the orbital angular momentum of an optical beam with the help of space-angle intensity moments", Proc. SPIE 4607, Selected Papers from Fifth International Conference on Correlation Optics, (5 February 2002); https://doi.org/10.1117/12.455175

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