title: Femtosecond direct-write überstructure waveguide Bragg gratings in ZBLAN.
abstract: Strong waveguide Bragg gratings (10.5 dB transmission dip) were fabricated using the femtosecond (fs) laser direct-write technique in ZBLAN glass. The Bragg gratings are based on depressed cladding waveguides and consist of planes, periodic according to the Bragg condition, which are constructed from a transverse hexagonal lattice of smaller point features. Such gratings are a key step toward the realization of mid-infrared monolithic waveguide lasers using the fs laser direct-write technique.
authors.affiliation: Centre of Ultrahigh bandwidth Devices for Optical Systems (CUDOS), MQ Photonics Research Centre, Department of Physics and Astronomy, Macquarie University, NSW 2109, Australia. simon.gross@mq.edu.au
authors.forename: Simon
authors.initials: S
authors.lastname: Gross
authors.forename: Martin
authors.initials: M
authors.lastname: Ams
authors.forename: David G
authors.initials: DG
authors.lastname: Lancaster
authors.forename: Tanya M
authors.initials: TM
authors.lastname: Monro
authors.forename: Alexander
authors.initials: A
authors.lastname: Fuerbach
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Withford