Title :
Impact of Interchannel Nonlinearities on a Split-Step Intrachannel Nonlinear Equalizer
Author :
Savory, Seb J. ; Gavioli, Giancarlo ; Torrengo, Enrico ; Poggiolini, Pierluigi
Author_Institution :
UCL Electron. & Electr. Eng. Dept., Univ. Coll. London, London, UK
fDate :
5/15/2010 12:00:00 AM
Abstract :
We experimentally investigate the use of split-step intrachannel nonlinear equalizer, for a wavelength-division-multiplexed (WDM) 112-Gb/s nonreturn-to-zero polarization-division-multiplexed quadri-phase-shift keying system using a digital coherent receiver. Our investigations demonstrate that the nonlinear compensation algorithm can increase the reach by 23% in a 100-GHz spacing WDM link compared to 46% for the single-channel case. When the channel spacing is reduced to 50 GHz, the reach improvement is minimal due to the uncompensated interchannel nonlinearities; nevertheless, the system robustness is improved as the system operating power dynamic range is widened by 2 dB.
Keywords :
compensation; equalisers; quadrature phase shift keying; radio receivers; wavelength division multiplexing; bit rate 112 Gbit/s; channel spacing; digital coherent receiver; frequency 100 GHz; frequency 50 GHz; interchannel nonlinearities; nonlinear compensation algorithm; nonreturn-to-zero multiplexed quadri-phase-shift keying system; polarization-division-multiplexed quadri-phase-shift keying system; split-step intrachannel nonlinear equalizer; wavelength-division-multiplexed; Nonlinear mitigation; polarization-division- multiplexing quadri-phase-shift keying (PDM-QPSK); wavelength-division-multiplexing (WDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2043837
