title: Toward visible cw-pumped supercontinua.
abstract: We report a 1 mum cw-pumped supercontinuum that extends short of the pump wavelength to 0.65 mum. This is achieved by using a 50 W Yb fiber laser in combination with a photonic crystal fiber with a carefully engineered zero-dispersion wavelength. We show that the short-wavelength generation is due to a combination of four-wave mixing and dispersive wave trapping by solitons. The evolution and limiting factors of the continuum are discussed.
authors.affiliation: Femtosecond Optics Group, Imperial College London, London, UK. b.cumberland05@imperial.ac.uk
authors.forename: B A
authors.initials: BA
authors.lastname: Cumberland
authors.forename: J C
authors.initials: JC
authors.lastname: Travers
authors.forename: S V
authors.initials: SV
authors.lastname: Popov
authors.forename: J R
authors.initials: JR
authors.lastname: Taylor