Open Access107 Gb/s uncompensated transmission over a 470 km hybrid fiber link with in-line SOAs using MLSE and duobinary signals
Author(s) -
John D. Downie,
Jason Hurley,
Y. Mauro
Publication year - 2008
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.16.015759
Subject(s) - demodulation , wavelength division multiplexing , optics , keying , transmission (telecommunications) , channel spacing , optical filter , optical carrier transmission rates , maximum likelihood sequence estimation , modulation (music) , narrowband , optical amplifier , filter (signal processing) , physics , electronic engineering , channel (broadcasting) , optical fiber , telecommunications , computer science , wavelength , radio over fiber , estimation theory , engineering , laser , algorithm , acoustics , computer vision
We experimentally demonstrate uncompensated 8-channel wavelength division multiplexing (WDM) and single channel transmission at 10.7 Gb/s over a 470 km hybrid fiber link with in-line semiconductor optical amplifiers (SOAs). Two different forms of the duobinary modulation format are investigated and compared. Maximum Likelihood Sequence Estimation (MLSE) receiver technology is found to significantly mitigate nonlinear effects from the SOAs and to enable the long transmission, especially for optical duobinary signals derived from differential phase shift keying (DPSK) signals directly detected after narrowband optical filter demodulation. The MLSE also helps to compensate for a non-optimal Fabry-Perot optical filter demodulator.