13 August 1993 Intensity correlation of a two-frequency wave at finite aperture detector
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A high-frequency electromagnetic wave propagating through a randomly inhomogeneous medium will create random intensity pattern whose spatial structure is a function of the radiation wavelength and the parameters of the medium. The ability to detect the spatial variation and to find correlation between different patterns depends on the ratio between the receiver aperture and the characteristic spatial scale of the speckle. In this work using multiscale solutions for high-frequency random propagators we construct expressions for the integral intensity correlation measures which allow us to obtain spatial and spectral intensity correlation characteristics and to analyze their variation as functions of wavelength separation and detector aperture. Numerical results are presented for a plane wave propagating in a random medium characterized by a power law spectrum of the refractive index fluctuations.
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Reuven Mazar, Reuven Mazar, Mark Rozental, Mark Rozental, E. Duman, E. Duman, } "Intensity correlation of a two-frequency wave at finite aperture detector", Proc. SPIE 1967, Characterization, Propagation, and Simulation of Sources and Backgrounds III, (13 August 1993); doi: 10.1117/12.151054; https://doi.org/10.1117/12.151054

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