title: Unrepeatered Nyquist PDM-16QAM transmission over 364  km using Raman amplification and multi-channel digital back-propagation.
abstract: Transmission of a net 467-Gb/s PDM-16QAM Nyquist-spaced superchannel is reported with an intra-superchannel net spectral efficiency (SE) of 6.6 (b/s)/Hz, over 364-km SMF-28 ULL ultra-low loss optical fiber, enabled by bi-directional second-order Raman amplification and digital nonlinearity compensation. Multi-channel digital back-propagation (MC-DBP) was applied to compensate for nonlinear interference; an improvement of 2 dB in Q(2) factor was achieved when 70-GHz DBP bandwidth was applied, allowing an increase in span length of 37 km.
authors.forename: Lidia
authors.initials: L
authors.lastname: Galdino
authors.forename: Mingming
authors.initials: M
authors.lastname: Tan
authors.forename: Domaniç
authors.initials: D
authors.lastname: Lavery
authors.forename: Pawel
authors.initials: P
authors.lastname: Rosa
authors.forename: Robert
authors.initials: R
authors.lastname: Maher
authors.forename: Ian D
authors.initials: ID
authors.lastname: Phillips
authors.forename: Juan D
authors.initials: JD
authors.lastname: Ania Castañón
authors.forename: Paul
authors.initials: P
authors.lastname: Harper
authors.forename: Robert I
authors.initials: RI
authors.lastname: Killey
authors.forename: Benn C
authors.initials: BC
authors.lastname: Thomsen
authors.forename: Sergejs
authors.initials: S
authors.lastname: Makovejs
authors.forename: Polina
authors.initials: P
authors.lastname: Bayvel