Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions
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
Description
This work is supported by UK EPSRCCollections
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