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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 5 — Mar. 1, 2008
  • pp: 479–481

Singularities in speckled speckle

Isaac Freund and David A. Kessler  »View Author Affiliations

Optics Letters, Vol. 33, Issue 5, pp. 479-481 (2008)

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Speckle patterns produced by random optical fields with two (or more) widely different correlation lengths exhibit speckle spots that are themselves highly speckled. Using computer simulations and analytic theory we present results for the point singularities of speckled speckle fields, namely, optical vortices in scalar (one polarization component) fields and C points in vector (two polarization components) fields. In single correlation length fields both types of singularities tend to be more or less uniformly distributed. In contrast, the singularity structure of speckled speckle is anomalous; for some sets of source parameters vortices and C points tend to form widely separated giant clusters, for other parameter sets these singularities tend to form chains that surround large empty regions. The critical point statistics of speckled speckle is also anomalous. In scalar (vector) single correlation length fields phase (azimuthal) extrema are always outnumbered by vortices (C points). In contrast, in speckled speckle fields, phase extrema can outnumber vortices and azimuthal extrema can outnumber C points by factors that can easily exceed 10 4 for experimentally realistic source parameters.

© 2008 Optical Society of America

OCIS Codes
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(030.6140) Coherence and statistical optics : Speckle
(030.6600) Coherence and statistical optics : Statistical optics
(260.0260) Physical optics : Physical optics
(260.5430) Physical optics : Polarization
(290.0290) Scattering : Scattering

ToC Category:
Coherence and Statistical Optics

Original Manuscript: December 12, 2007
Revised Manuscript: January 16, 2008
Manuscript Accepted: January 28, 2008
Published: February 27, 2008

Isaac Freund and David A. Kessler, "Singularities in speckled speckle," Opt. Lett. 33, 479-481 (2008)

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