title: Coherent supercontinuum generation in photonic crystal fiber with all-normal group velocity dispersion.
abstract: We demonstrate supercontinuum generation in a photonic crystal fiber with all-normal group velocity dispersion. Pumping a short section of this fiber with compressed pulses from a compact amplified fiber laser generates a 200 nm bandwidth continuum with typical self-phase-modulation characteristics. We demonstrate that the supercontinuum is compressible to a duration of 26 fs. It therefore has a high degree of coherence between all the frequency components, and is a single pulse in the time domain. A smooth, flat spectrum spanning 800 nm is achieved using a longer piece of fiber.
authors: Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath, BA2 7AY, UK. l.e.hooper@bath.ac.uk
authors: L E
authors: LE
authors: Hooper
authors: P J
authors: PJ
authors: Mosley
authors: A C
authors: AC
authors: Muir
authors: W J
authors: WJ
authors: Wadsworth
authors: J C
authors: JC
authors: Knight