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

Volume

22

Issue

10

fYear

2010

fDate

5/15/2010 12:00:00 AM

Firstpage

673

Lastpage

675

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);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2043837

Filename

5422682