title: Spatially resolved small-angle noncollinear interferometric autocorrelation of ultrashort pulses with microaxicon arrays.
abstract: Small-angle, noncollinear, first- and second-order interferometric autocorrelation experiments with Ti:sapphire laser pulses of 9-80-fs duration have been performed with microaxicon arrays. Predictions of short-pulse spatial frequency effects were verified by comparison of interference patterns of single elements and matrices. An angular spectrum of Gaussian-shaped axicons was analyzed on the basis of linear refraction. Experimental data indicate contributions to autocorrelation by nonlinear refraction and travel-time differences. The influence of the spectral bandwidth was separated from the pulse-duration-dependent effects. Spatially resolved information about the coherence time was delivered by the multichannel structure.
authors.affiliation: Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Berlin, Germany. grunwald@mbi-berlin.de
authors.forename: R
authors.initials: R
authors.lastname: Grunwald
authors.forename: U
authors.initials: U
authors.lastname: Griebner
authors.forename: E T
authors.initials: ET
authors.lastname: Nibbering
authors.forename: A
authors.initials: A
authors.lastname: Kummrow
authors.forename: M
authors.initials: M
authors.lastname: Rini
authors.forename: T
authors.initials: T
authors.lastname: Elsaesser
authors.forename: V
authors.initials: V
authors.lastname: Kebbel
authors.forename: H J
authors.initials: HJ
authors.lastname: Hartmann
authors.forename: W
authors.initials: W
authors.lastname: Jüptner