title: Shape-invariant difference between two Gaussian Schell-model beams.
abstract: The difference between two Gaussian Schell-model cross-spectral densities can give a new genuine correlation function if suitable conditions are met. Generally speaking, the structure of such cross-spectral density changes in a complicated way upon propagation. We consider here the notable exception of shape-invariant beams, and we investigate their intensity and coherence properties. The modal analysis of this class of cross-spectral densities is exploited to devise a synthesis scheme for this type of beam.
authors.forename: R
authors.initials: R
authors.lastname: Borghi
authors.forename: F
authors.initials: F
authors.lastname: Gori
authors.forename: G
authors.initials: G
authors.lastname: Guattari
authors.forename: M
authors.initials: M
authors.lastname: Santarsiero