title: Complex amplitude correlations of dynamic laser speckle in complex ABCD optical systems.
abstract: Within the framework of complex ABCD-matrix theory, exact theoretical expressions are derived for the space-time-lagged cross-covariance functions of the fields valid for arbitrary (complex) ABCD-optical systems, i.e., systems that include Gaussian-shaped apertures and partially developed speckle. Specifically, we show and discuss the results for the three generic systems, i.e., free-space propagation, Fourier transform configuration, and imaging. To cope with various surface structures of varying rms surface heights, we apply two models in addition to employing the usual model for surfaces giving rise to fully developed speckle. The theoretical results found for free-space propagation are supported by interferometrically obtained data.
authors.affiliation: Laboratory for Information Photonics and Wave Signal Processing, Department of Information and Communication Engineering, The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, Japan.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Steen G
authors.initials: SG
authors.lastname: Hanson
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Takeda