Open AccessPDM-16QAM transmission performance over uncompensated fiber links
Author(s) -
Pierpaolo Boffi,
Paolo Martelli,
M. Cirigliano,
Maurizio Magarini,
Mario Martinelli,
Marco Bertolini,
M.E. Pepe,
Domenico Di Mola,
G. Gavioli
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.021898
Subject(s) - baud , quadrature amplitude modulation , optics , transmission (telecommunications) , wavelength division multiplexing , spectral efficiency , dispersion (optics) , physics , computer science , electronic engineering , bit error rate , telecommunications , channel (broadcasting) , wavelength , engineering
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.