Title :
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
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2089047