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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/6111

Title: Quantitative measurement of the orbital angular momentum density of light
Authors: Dudley, A
Litvin, IA
Forbes, A
Keywords: Orbital angular momentum
OAM
Optics
Physics
Bessel–Gaussian beams
Bessel beams
Issue Date: Mar-2012
Publisher: Optical Society of America
Citation: Dudley, A, Litvin, IA and Forbes, A. 2012. Quantitative measurement of the orbital angular momentum density of light. Applied Optics, vol. 51(7), pp 823-833
Series/Report no.: Workflow;9621
Abstract: In this work we derive expressions for the orbital angular momentum (OAM) density of light, for both symmetric and nonsymmetric optical fields, that allow a direct comparison between theory and experiment. We present a simple method for measuring the OAM density in optical fields and test the approach on superimposed nondiffracting higher-order Bessel beams. The measurement technique makes use of a single spatial light modulator and a Fourier transforming lens to measure the OAM spectrum of the optical field. Quantitative values for the OAM density as a function of the radial position in the optical field are obtained for both symmetric and nonsymmetric superpositions, illustrating good agreement with the theoretical prediction.
Description: Copyright: 2012 OSA. This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ao/submit/review/copyright_permissions.cfm. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
URI: http://www.opticsinfobase.org/ao/viewmedia.cfm?uri=ao-51-7-823&seq=0
http://hdl.handle.net/10204/6111
ISSN: 1559-128X
Appears in Collections:Laser physics and technology
General science, engineering & technology

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