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Updated: May 13, 2026

Implementation of a Nonlinear Microscope Based on Stimulated Raman Scattering
Published on: July 6, 2019
Extension and validation of the GN model for non-linear interference to uncompensated links using Raman amplification
Vittorio Curri1, Andrea Carena, Pierluigi Poggiolini
1DET, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy. curri@polito.it
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.
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