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Proceedings Paper

Measuring the orbital angular momentum density for a superposition of Bessel beams
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Paper Abstract

In this report we theoretically calculate and experimentally measure the OAM density of a coherent superposition of both symmetric and non-symmetric non-diffracting Bessel beams. Although the intensity pattern of the superimposed field rotates at a fixed angular velocity (which is due to the differing wave-vectors of the component fields), we show that the magnitude and direction of the OAM is dependent on the radial position within the field. We outline a simple approach using only a spatial light modulator to measure the OAM density for a superposition of non-diffracting Bessel beams. Our quantitative measurements are in good agreement with predicted values.

Paper Details

Date Published: 10 February 2012
PDF: 7 pages
Proc. SPIE 8274, Complex Light and Optical Forces VI, 827406 (10 February 2012); doi: 10.1117/12.910779
Show Author Affiliations
A. Dudley, CSIR National Laser Ctr. (South Africa)
Univ. of KwaZulu-Natal (South Africa)
I. Litvin, CSIR National Laser Ctr. (South Africa)
A. Forbes, CSIR National Laser Ctr. (South Africa)
Univ. of KwaZulu-Natal (South Africa)


Published in SPIE Proceedings Vol. 8274:
Complex Light and Optical Forces VI
Enrique J. Galvez; David L. Andrews; Jesper Glückstad; Marat S. Soskin, Editor(s)

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