title: Modal content measurements (S2) of negative curvature hollow-core photonic crystal fibers.
abstract: We present modal content measurements (S2) of two different negative curvature hollow-core photonic crystal fibers: a kagome fiber and an ice cream cone fiber. Their sensitivity towards mode matching, bending and polarization is analyzed. For the kagome fiber, a higher order mode suppression of 17dB under optimal conditions was achieved, and for the ice cream cone fiber there was a suppression of up to 42dB. Polarization turned out to be a critical parameter for good higher order mode suppression in both fibers.
authors.forename: V
authors.initials: V
authors.lastname: Bock
authors.forename: M
authors.initials: M
authors.lastname: Plötner
authors.forename: O
authors.initials: O
authors.lastname: De Vries
authors.forename: J
authors.initials: J
authors.lastname: Nold
authors.forename: N
authors.initials: N
authors.lastname: Haarlammert
authors.forename: T
authors.initials: T
authors.lastname: Schreiber
authors.forename: R
authors.initials: R
authors.lastname: Eberhardt
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann