title: Noise filtering in a multi-channel system using a tunable liquid crystal photonic bandgap fiber.
abstract: This paper reports on the first application of a liquid crystal infiltrated photonic bandgap fiber used as a tunable filter in an optical transmission system. The device allows low-cost amplified spontaneous emission (ASE) noise filtering and gain equalization with low insertion loss and broad tunability. System experiments show that the use of this filter increases for times the distance over which the optical signal-to-noise ratio (OSNR) is sufficient for error-free transmission with respect to the case in which no filtering is used.
authors.affiliation: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark.
authors.forename: Martin Nordal
authors.initials: MN
authors.lastname: Petersen
authors.forename: Lara
authors.initials: L
authors.lastname: Scolari
authors.forename: Torger
authors.initials: T
authors.lastname: Tokle
authors.forename: Thomas Tanggaard
authors.initials: TT
authors.lastname: Alkeskjold
authors.forename: Sebastian
authors.initials: S
authors.lastname: Gauza
authors.forename: Shin-Tson
authors.initials: ST
authors.lastname: Wu
authors.forename: Anders
authors.initials: A
authors.lastname: Bjarklev