title: Dynamic control of higher-order modes in hollow-core photonic crystal fibers.
abstract: We present a versatile method for selective mode coupling into higher-order modes of photonic crystal fibers, using holograms electronically generated by a spatial light modulator. The method enables non-mechanical and completely repeatable changes in the coupling conditions. We have excited higher order modes up to LP(31) in hollow-core photonic crystal fibers. The reproducibility of the coupling allows direct comparison of the losses of different guided modes in both hollow-core bandgap and kagome-lattice photonic crystal fibers. Our results are also relevant to applications in which the intensity distribution of the light inside the fiber is important, such as particle- or atom-guidance.
authors.affiliation: Max-Planck Research Group IOIP, University of Erlangen-Nuremberg, Erlangen, Germany.
authors.forename: T G
authors.initials: TG
authors.lastname: Euser
authors.forename: G
authors.initials: G
authors.lastname: Whyte
authors.forename: M
authors.initials: M
authors.lastname: Scharrer
authors.forename: J S Y
authors.initials: JS
authors.lastname: Chen
authors.forename: A
authors.initials: A
authors.lastname: Abdolvand
authors.forename: J
authors.initials: J
authors.lastname: Nold
authors.forename: C F
authors.initials: CF
authors.lastname: Kaminski
authors.forename: P St J
authors.initials: PS
authors.lastname: Russell