title: On-axis diffraction of an ultrashort light pulse by circularly symmetric hard apertures.
abstract: The analytical solution of the Rayleigh-Sommerfeld on-axis diffraction integral for an ultrashort light pulse diffracted by circularly symmetric hard apertures is derived. The particular case of a circular aperture is treated in detail. The time changes of the instantaneous intensity along the axial direction are predicted. An analysis of the standard deviation width shows a pulse broadening about the axial positions where the instantaneous intensity reaches a zero value. We show that the temporal shape of the instantaneous intensity depends on the number of oscillation cycles at the central frequency of the real electric field.
authors.affiliation: GROC, Departament de Física, Universitat Jaume I, E12080 Castelló, Spain. omendoza@uji.es
authors.forename: Omel
authors.initials: O
authors.lastname: Mendoza-Yero
authors.forename: Gladys
authors.initials: G
authors.lastname: Mínguez-Vega
authors.forename: Jesús
authors.initials: J
authors.lastname: Lancis
authors.forename: Mercedes
authors.initials: M
authors.lastname: Fernández-Alonso
authors.forename: Vicent
authors.initials: V
authors.lastname: Climent