Article

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

WDM Dynamic Networks Dept., Alcatel-Lucent Bell Labs., Nozay, France
IEEE Photonics Technology Letters (impact factor: 2.19). 01/2011; DOI:10.1109/LPT.2010.2089047 pp.1859 - 1861
Source: IEEE Xplore

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.

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Keywords

112-Gb/s polarization-division-multiplexed quaternary phase-shift keying system
 
narrower transmitter bandwidth degrades
 
nonlinear threshold difference
 
signal degradations
 
single channel
 
standard single-mode fiber
 
transmitter bandwidth
 
wavelength-division-multiplexed configuration