title: PDM-16QAM transmission performance over uncompensated fiber links.
abstract: The dependence of propagation performance on the signal baud-rate is investigated by simulations for WDM PDM-16QAM systems operating at a spectral efficiency of 4 b/s/Hz. We take into account the case of transmission over uncompensated links, both for standard single-mode fiber and non-zero dispersion-shifted fiber. Three baud-rates are tested: 16.25, 32.5 and 65 Gbaud, including overhead for soft-decision FEC. Hence, we compare the performance limited by the nonlinear impairments in case of 100, 200 and 400 Gb/s data rate transmission, respectively. We demonstrate that the trade-off between higher OSNR margin and nonlinear transmission penalty favors transmission at lower baud-rate (16.25 Gbaud) and narrower channel spacing (25 GHz), among the three different simulated baud-rates.
authors: Dept. Electronics and Information – PoliCom, Politecnico di Milano, via G. Colombo 81, 20133 Milano (MI), Italy. boffi@elet.polimi.it
authors: Pierpaolo
authors: P
authors: Boffi
authors: Paolo
authors: P
authors: Martelli
authors: Matteo
authors: M
authors: Cirigliano
authors: Maurizio
authors: M
authors: Magarini
authors: Mario
authors: M
authors: Martinelli
authors: Marco
authors: M
authors: Bertolini
authors: Marianna
authors: M
authors: Pepe
authors: Domenico
authors: D
authors: Di Mola
authors: Giancarlo
authors: G
authors: Gavioli