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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4510–4513

Incoherent averaging of phase singularities in speckle-shearing interferometry

Klaus Mantel, Vanusch Nercissian, and Norbert Lindlein  »View Author Affiliations


Optics Letters, Vol. 39, Issue 15, pp. 4510-4513 (2014)
http://dx.doi.org/10.1364/OL.39.004510


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Abstract

Interferometric speckle techniques are plagued by the omnipresence of phase singularities, impairing the phase unwrapping process. To reduce the number of phase singularities by physical means, an incoherent averaging of multiple speckle fields may be applied. It turns out, however, that the results may strongly deviate from the expected N behavior. Using speckle-shearing interferometry as an example, we investigate the mechanism behind the reduction of phase singularities, both by calculations and by computer simulations. Key to an understanding of the reduction mechanism during incoherent averaging is the representation of the physical averaging process in terms of certain vector fields associated with each speckle field.

© 2014 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(120.6165) Instrumentation, measurement, and metrology : Speckle interferometry, metrology

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 14, 2014
Revised Manuscript: June 24, 2014
Manuscript Accepted: June 27, 2014
Published: July 28, 2014

Citation
Klaus Mantel, Vanusch Nercissian, and Norbert Lindlein, "Incoherent averaging of phase singularities in speckle-shearing interferometry," Opt. Lett. 39, 4510-4513 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-15-4510

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