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Proceedings Paper

Statistics of phase singularity of a speckle field in atmospheric turbulence
Author(s): Ruizhong Rao
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Paper Abstract

Numerical experiments are carried out for a plane wave propagating in atmospheric turbulence and reflected from a rough surface under weak to strong fluctuation condition. The statistical characteristics of the scintillation index and the number density of the phase singularity (or the optical vortex) are analyzed. The density of the phase singularity is evaluated as a function of the Rytov index, the Fresnel length, the correlation scale and roughness of the surface. Correlation and interaction between both types of phase singularity caused by rough surface and turbulence are analyzed. Results could provide a theoretical basis for measurement of surface roughness under known turbulence condition or measurement of atmospheric turbulence under known surface roughness condition.

Paper Details

Date Published: 14 September 2010
PDF: 6 pages
Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73871H (14 September 2010); doi: 10.1117/12.868315
Show Author Affiliations
Ruizhong Rao, Anhui Institute of Optics and Fine Mechanics (China)

Published in SPIE Proceedings Vol. 7387:
Speckle 2010: Optical Metrology
Armando Albertazzi Goncalves; Guillermo H. Kaufmann, Editor(s)

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