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Mesoscopic speckle
Phys. Rev. E 82, 051114 – Published 10 November, 2010
DOI: https://doi.org/10.1103/PhysRevE.82.051114
Abstract
We have measured first and second order statistics of the velocity of phase singularities in evolving speckle patterns of microwave radiation transmitted through random quasi-1D samples as the frequency is swept and relate these to global statistics of speckle evolution. When is normalized by the standard deviation of the fractional intensity change, the probability distribution and correlation function of approach those for random Gaussian fields even for localized waves. Analogous results are found for transmitted intensity normalized by the total transmission. This provides a unified framework for the statistics of speckle evolution and intensity.
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