title: Extension and validation of the GN model for non-linear interference to uncompensated links using Raman amplification.
abstract: We show the extension of the Gaussian Noise model, which describes non-linear propagation in uncompensated links of multilevel modulation formats, to systems using Raman amplification. We successfully validate the analytical results by comparison with numerical simulations of Nyquist-WDM PM-16QAM channels transmission over multi-span uncompensated links made of a single fiber type and using hybrid EDFA/Raman amplification with counter-propagating pumps. We analyze two typical high- and low-dispersion fiber types. We show that Raman amplification always induces a limited non-linear interference enhancement compared to the dominant ASE noise reduction.
authors.affiliation: DET, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy. curri@polito.it
authors.forename: Vittorio
authors.initials: V
authors.lastname: Curri
authors.forename: Andrea
authors.initials: A
authors.lastname: Carena
authors.forename: Pierluigi
authors.initials: P
authors.lastname: Poggiolini
authors.forename: Gabriella
authors.initials: G
authors.lastname: Bosco
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Forghieri
mesh_terms: D000669:Amplifiers, Electronic; D003198:Computer Simulation; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D015233:Models, Statistical; D017711:Nonlinear Dynamics; D016011:Normal Distribution; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman / Q000295:instrumentation* / Q000379:methods*