title: Properties of a hollow-core photonic bandgap fiber at 850 nm wavelength.
abstract: We describe a hollow-core photonic bandgap fiber designed for use in the 850 nm wavelength region. The fiber has a minimum attenuation of 180dB/km at 847nm wavelength. The low-loss mode has a quasi- Gaussian intensity profile. The group-velocity dispersion of this mode passes through zero around 830nm, and is anomalous for longer wavelengths. The polarization beat length varies from 4 mm to 13 mm across the band gap. We expect this fiber to be useful for delivery of high-energy ultrashort optical pulses.
authors.forename: G
authors.initials: G
authors.lastname: Bouwmans
authors.forename: F
authors.initials: F
authors.lastname: Luan
authors.forename: Jonathan
authors.initials: J
authors.lastname: Knight
authors.forename: P
authors.initials: P
authors.lastname: St J Russell
authors.forename: L
authors.initials: L
authors.lastname: Farr
authors.forename: B
authors.initials: B
authors.lastname: Mangan
authors.forename: H
authors.initials: H
authors.lastname: Sabert