title: Hollow core fiber with an octave spanning bandgap.
abstract: We thoroughly compare the out-of-plane bandgaps generated by three realistic two-dimensional lattices: a triangular and a square arrangement of holes and a triangular arrangement of rods. We demonstrate that, for any given hole-diameter-to-pitch ratio d/Lambda, the triangular arrangement of interconnected resonators generates the widest possible bandgap along the air line, and we propose a physical interpretation explaining these results. The design of a hollow core photonic bandgap fiber based on such a lattice and able to transmit light with sub-decibel-per-meter losses over an octave of frequencies is presented for the first time, to the best of our knowledge.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, B53, Highfield Campus, Southampton SO17 1BJ, UK. frap@orc.soton.ac.uk
authors.forename: Francesco
authors.initials: F
authors.lastname: Poletti