title: Pulse characterization by THG d-scan in absorbing nonlinear media.
abstract: We report on few-cycle pulse characterization based on third harmonic generation dispersion scan (THG d-scan) measurements using thin films of different TiO(2)-SiO(2) compositions as nonlinear media. By changing the TiO(2) concentration in the thin film the band gap and therefore the position of the absorption edge were varied. The retrieved pulse durations from different nonlinear media agree within 5%, and the reconstructed pulse shapes prove to be immune against the absorption edges as well. The reason is the robust retrieval algorithm which takes the influence of wavelength dependent nonlinearity into account by a spectral weight function.
authors.forename: Mathias
authors.initials: M
authors.lastname: Hoffmann
authors.forename: Tamas
authors.initials: T
authors.lastname: Nagy
authors.forename: Thomas
authors.initials: T
authors.lastname: Willemsen
authors.forename: Marco
authors.initials: M
authors.lastname: Jupé
authors.forename: Detlev
authors.initials: D
authors.lastname: Ristau
authors.forename: Uwe
authors.initials: U
authors.lastname: Morgner