title: Deep-blue supercontinnum sources with optimum taper profiles--verification of GAM.
abstract: We use an asymmetric 2 m draw-tower photonic crystal fiber taper to demonstrate that the taper profile needs careful optimisation if you want to develop a supercontinuum light source with as much power as possible in the blue edge of the spectrum. In particular we show, that for a given taper length, the downtapering should be as long as possible. We argue how this may be explained by the concept of group-acceleration mismatch (GAM) and we confirm the results using conventional symmetrical short tapers made on a taper station, which have varying downtapering lengths.
authors.affiliation: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark. stso@fotonik.dtu.dk
authors.forename: S T
authors.initials: ST
authors.lastname: Sørensen
authors.forename: U
authors.initials: U
authors.lastname: Møller
authors.forename: C
authors.initials: C
authors.lastname: Larsen
authors.forename: P M
authors.initials: PM
authors.lastname: Moselund
authors.forename: C
authors.initials: C
authors.lastname: Jakobsen
authors.forename: J
authors.initials: J
authors.lastname: Johansen
authors.forename: T V
authors.initials: TV
authors.lastname: Andersen
authors.forename: C L
authors.initials: CL
authors.lastname: Thomsen
authors.forename: O
authors.initials: O
authors.lastname: Bang
mesh_terms: D000465:Algorithms; D001703:Biophysics / Q000379:methods*; D003460:Crystallization; D004867:Equipment Design; D005336:Fiber Optic Technology; D008027:Light; D008962:Models, Theoretical; D055100:Optical Fibers; D017785:Photons; D010825:Physics / Q000379:methods; D015203:Reproducibility of Results; D013059:Spectrum Analysis, Raman / Q000379:methods; D014466:Ultraviolet Rays