title: Frequency tunability of solid-core photonic crystal fibers filled with nanoparticle-doped liquid crystals.
abstract: We infiltrate liquid crystals doped with BaTiO3 nanoparticles in a photonic crystal fiber and compare the measured transmission spectrum with the one achieved without dopant. New interesting features, such as frequency modulation response of the device and a transmission spectrum with tunable attenuation on the short wavelength side of the widest bandgap, suggest a potential application of this device as a tunable all-in-fiber gain equalization filter with an adjustable slope. The tunability of the device is achieved by varying the amplitude and the frequency of the applied external electric field. The threshold voltage for doped and undoped liquid crystals in a silica capillary and in a glass cell are also measured as a function of the frequency of the external electric field and the achieved results are compared.
authors.affiliation: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark,Ørsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark. lsco@fotonik.dtu.dk
authors.forename: Lara
authors.initials: L
authors.lastname: Scolari
authors.forename: Sebastian
authors.initials: S
authors.lastname: Gauza
authors.forename: Haiqing
authors.initials: H
authors.lastname: Xianyu
authors.forename: Lei
authors.initials: L
authors.lastname: Zhai
authors.forename: Lars
authors.initials: L
authors.lastname: Eskildsen
authors.forename: Thomas T
authors.initials: TT
authors.lastname: Alkeskjold
authors.forename: Shin-Tson
authors.initials: ST
authors.lastname: Wu
authors.forename: Anders
authors.initials: A
authors.lastname: Bjarklev