Statistics of phase singularity of a speckle field in atmospheric turbulence

Ruizhong Rao

doi:10.1117/12.868315

13 September 2010 Statistics of phase singularity of a speckle field in atmospheric turbulence

Ruizhong Rao

Proceedings Volume 7387, Speckle 2010: Optical Metrology; 73871H (2010) https://doi.org/10.1117/12.868315
Event: Speckle 2010, 2010, Florianapolis, Brazil

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.

Citation Download Citation

Ruizhong Rao "Statistics of phase singularity of a speckle field in atmospheric turbulence", Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73871H (13 September 2010); https://doi.org/10.1117/12.868315

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KEYWORDS

Atmospheric propagation

Speckle

Turbulence

Scintillation

Spiral phase plates

Wave propagation

Atmospheric turbulence

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