Impact of Transmitter Bandwidth on Transmission Performance of Coherent 112-Gb/s PDM-QPSK Systems

Author

Koebele, Clemens ; Salsi, Massimiliano ; Charlet, Gabriel ; Bertran-Pardo, Oriol ; Renaudier, Jeremie ; Mardoyan, Haik ; Tran, Patrice ; Bigo, Sebastien

Author_Institution

WDM Dynamic Networks Dept., Alcatel-Lucent Bell Labs., Nozay, France

Volume

22

Issue

24

fYear

2010

Firstpage

1859

Lastpage

1861

Abstract

We investigate the impact of the transmitter bandwidth on the nonlinear tolerance in a 112-Gb/s polarization-division-multiplexed quaternary phase-shift keying system with coherent detection over a 1200-km dispersion-managed link using standard single-mode fiber. We show that a narrower transmitter bandwidth degrades not only the noise tolerance, but also exacerbates signal degradations due to nonlinearities both in single channel and in wavelength-division-multiplexed configuration. A nonlinear threshold difference of approximately 1 dB is observed.

Keywords

interference (signal); light coherence; optical fibre networks; optical fibre polarisation; optical links; optical transmitters; quadrature phase shift keying; wavelength division multiplexing; bit rate 112 Gbit/s; coherent PDM-QPSK systems; dispersion-managed link; distance 1200 km; noise tolerance; nonlinear tolerance; polarization-division-multiplexed quaternary phase-shift keying system; signal degradation; standard single-mode fiber; transmitter bandwidth; wavelength-division-multiplexed configuration; Bandwidth; Optical fibers; Optical noise; Optical transmitters; Receivers; Wavelength division multiplexing; Nonlinearities; optical fiber communication; optical modulation;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2089047

Filename

5605651