title: 112 Gb/s PM-QPSK transmission up to 6000 km with 200 km amplifier spacing and a hybrid fiber span configuration.
abstract: We demonstrate transmission of 112 Gb/s PM-QPSK signals over a system with 200 km span lengths. Amplification is provided by hybrid backward-pumped Raman/EDFA amplifiers and reach lengths up to 6000 km for an 8 channel system and 5400 km for a 32 channel system are shown. As a means of maximizing OSNR, a simple hybrid fiber span configuration is used that combines two ultra-low loss fibers, one having very large effective area.
authors.affiliation: Corning Incorporated, 1 Riverfront Plaza, SP-AR-02-1, Corning, New York 14831, USA. downiejd@corning.com
authors.forename: John D
authors.initials: JD
authors.lastname: Downie
authors.forename: Jason
authors.initials: J
authors.lastname: Hurley
authors.forename: John
authors.initials: J
authors.lastname: Cartledge
authors.forename: Scott
authors.initials: S
authors.lastname: Bickham
authors.forename: Snigdharaj
authors.initials: S
authors.lastname: Mishra