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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 23 — Dec. 1, 2012
  • pp: 4949–4951

Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions

Yuanjie Yang, Michael Mazilu, and Kishan Dholakia  »View Author Affiliations

Optics Letters, Vol. 37, Issue 23, pp. 4949-4951 (2012)

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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.

© 2012 Optical Society of America

OCIS Codes
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Coherence and Statistical Optics

Original Manuscript: September 3, 2012
Revised Manuscript: October 22, 2012
Manuscript Accepted: October 24, 2012
Published: November 28, 2012

Yuanjie Yang, Michael Mazilu, and Kishan Dholakia, "Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions," Opt. Lett. 37, 4949-4951 (2012)

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