title: Coherent and incoherent spectral broadening in a photonic crystal fiber.
abstract: The coherence of the spectral broadening process is the key requisite for the application of supercontinua in frequency combs. We investigate the coherence of two subsequent supercontinuum pulses created in a photonic crystal fiber pumped by a femtosecond laser. We measure Young interference fringes from a Michelson-type interferometer at different wavelengths of the output spectrum and analyze their dependence on pump intensity and polarization. The visibility of these fringes is a direct measure of the coherence of the spectral broadening processes.
authors.affiliation: Johannes Gutenberg-Universität, Staudingerweg 7, D-55128 Mainz, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Gross
authors.forename: Th
authors.initials: T
authors.lastname: Best
authors.forename: D
authors.initials: D
authors.lastname: van Oosten
authors.forename: I
authors.initials: I
authors.lastname: Bloch