title: Single-mode pumped high air-fill fraction photonic crystal fiber taper for high-power deep-blue supercontinuum sources.
abstract: Dispersion control with axially nonuniform photonic crystal fibers (PCFs) permits supercontinuum (SC) generation into the deep-blue from an ytterbium pump laser. In this Letter, we exploit the full degrees of freedom afforded by PCFs to fabricate a fiber with longitudinally increasing air-fill fraction and decreasing diameter directly on the draw-tower. We demonstrate SC generation extending down to 375 nm in one such monolithic fiber device that is single-mode at 1064 nm at the input end.
authors.forename: Simon T
authors.initials: ST
authors.lastname: Sørensen
authors.forename: Casper
authors.initials: C
authors.lastname: Larsen
authors.forename: Christian
authors.initials: C
authors.lastname: Jakobsen
authors.forename: Carsten L
authors.initials: CL
authors.lastname: Thomsen
authors.forename: Ole
authors.initials: O
authors.lastname: Bang