Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions
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Date
01/12/2012Funder
Grant ID
502011.K501/NG
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Abstract
By analysis of the far-field cross-correlation function (CCF) of partially coherent optical beams, we demonstrate an implicit rule that the number of ring dislocations (dark zones) of the far-field CCF is equal to the original topological charge of an optical vortex rendered partially coherent. This novel link between an optical vortex and its correlation singularity may offer an efficient method for measuring the orbital angular momentum of partially coherent optical vortices in fields such as astrophysics and astronomy, as well as atmospheric laser communication.
Citation
Yang , Y , Mazilu , M & Dholakia , K 2012 , ' Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions ' , Optics Letters , vol. 37 , no. 23 , pp. 4949-4951 . https://doi.org/10.1364/OL.37.004949
Publication
Optics Letters
Status
Peer reviewed
ISSN
0146-9592Type
Journal article
Rights
© 2012 Optical Society of America. This paper was published in Optics Letters 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/ol/abstract.cfm?uri=ol-37-23-4949. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Description
This work is supported by UK EPSRCCollections
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