title: Twisted Gaussian Schell-model beams as series of partially coherent modified Bessel-Gauss beams.
abstract: We show that twisted Gaussian Schell-model (TGSM) beams can be represented through an incoherent superposition of partially coherent beams carrying optical vortices and whose cross-spectral densities are expressed in terms of modified Bessel functions. Moreover, starting from this result, we show that the modal expansion of the cross-spectral density of a TGSM source can be directly obtained through simple mathematics.
authors.forename: F
authors.initials: F
authors.lastname: Gori
authors.forename: M
authors.initials: M
authors.lastname: Santarsiero