Spectral Gaussian Schell-model beams

A generalization of the classic Gaussian Schell-model source is considered for which the rms width of the beam σ and the rms width of the spectral degree of coherence S are assumed to depend on wavelength. It is shown that the functional form σ(λ) and δ(λ) of such a source can affect the behavior of the spectral density, the degree of coherence, and the degree of polarization of the propagating beam.