title: Hybrid optics for focusing ultrashort laser pulses.
abstract: We present a specially designed hybrid optics comprising refraction and diffraction effects for tight spatial and temporal focusing of ultrashort laser pulses. Both aims can be put into practice by having a high numerical aperture (NA=0.45) and low internal dispersion at the same time. We are presenting what we believe is the first experimental realization of such a hybrid short plus focusing optics. The focusing properties are compared with a commonly used microscope objective (20 X, NA = 0.45) in theory and experimentally.
authors.affiliation: Fraunhofer-Institut für Angewandte Optik und Feinmechanik, Jena, Germany. ulrike.fuchs@iof.fraunhofer.de
authors.forename: Ulrike
authors.initials: U
authors.lastname: Fuchs
authors.forename: Uwe D
authors.initials: UD
authors.lastname: Zeitner
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann