Correlation singularities in partially coherent electromagnetic beams

Journal article (2012)
Department
Telecommunications (EEMCS) (TU Delft)
Copyright: © 2012 Optical Society of America
DOI: https://doi.org/doi:10.1364/OL.37.004179
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Published Date

02-10-2012

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Source:

Optics Letters, 37 (20), 2012

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Telecommunications

Abstract

We demonstrate that coherence vortices, singularities of the correlation function, generally occur in partially coherent electromagnetic beams. In successive cross sections of Gaussian Schell-model beams, their locus is found to be a closed string. These coherence singularities have implications for both interference experiments and correlation of intensity fluctuation measurements performed with such beams.