title: Spectral changes and spectral switches of partially coherent beams focused by an aperture lens.
abstract: Starting from the propagation law of partially coherent polychromatic light in the space-frequency domain, detailed numerical results and physical analysis are given to elucidate spectral changes and spectral switches at the geometrical focal plane of Gaussian Schell-model beams focused by an aperture lens. It is found that, in contrast to the aperture-induced spectral anomalies of spatially fully coherent polychromatic light, for partially coherent polychromatic light aperture diffraction plays an important role in spectral switching, but the truncation parameter, spectral correlation, and bandwidth all affect its spectral behavior.
authors.affiliation: Department of Physics, Luoyang Normal College, Luoyang 471022, China. panliuzhan@263.net
authors.forename: Liuzhan
authors.initials: L
authors.lastname: Pan
authors.forename: Baida
authors.initials: B
authors.lastname: Lü