title: Square core jacketed air-clad fiber.
abstract: We report the fabrication of a highly multi-mode square core jacketed air-clad fiber with a top-hat near-field intensity profile. Using this fiber to deliver Q-switched pulses at 1 mum we have successfully produced square shaped ablation marks in indium tin oxide (ITO) without the use of complex beam shaping optics.
authors.affiliation: Optoelectronics Research Centre University of Southampton, SO17 1BJ, UK. jrh@orc.soton.ac.uk
authors.forename: John R
authors.initials: JR
authors.lastname: Hayes
authors.forename: Joanne C
authors.initials: JC
authors.lastname: Flanagan
authors.forename: Tanya M
authors.initials: TM
authors.lastname: Monro
authors.forename: David J
authors.initials: DJ
authors.lastname: Richardson
authors.forename: Phillip
authors.initials: P
authors.lastname: Grunewald
authors.forename: Ric
authors.initials: R
authors.lastname: Allott