Comparison of the dispersion allocated WDM (10 Gbit/s×10 channels) optical soliton and NRZ systems using a Q map

Akio Sahara, Hirokazu Kubota, Masataka Nakazawa

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11 Citations (Scopus)


We compared the transmission quality of wavelength division multiplexing (WDM) soliton and WDM nonreturn-to-zero (NRZ) systems numerically by using a Q contour map for WDM. The bit rate was set at 100 Gbit/s (10 Gbit/s×10 channels). We studied the effect of dispersion allocation in detail and found that there is a significant improvement in the transmission quality of WDM soliton systems when a large dispersion allocation is used. Such an improvement was not obtained in the WDM NRZ system. We show that a dispersion allocated WDM soliton system using 1.3 μm standard fiber has greater potential for increasing the transmission distance than a WDM NRZ system. This result confirms the experimental result reported by Le Guen et al. [D. Le Guen, A. O'Hare, S. Del Burgo, D. Grot, F. Favre, T. Georges, Narrow band 640 Gbit/s soliton WDM transmission over 1200 km of standard fibre with 100 km-21 dB amplifier spans, European Conf. on Optical Communications '98, Madrid, Post Deadline Papers, 1998, pp. 59-63].

Original languageEnglish
Pages (from-to)139-145
Number of pages7
JournalOptics Communications
Issue number1-3
Publication statusPublished - 1999 Feb 1
Externally publishedYes


  • Dispersion allocation
  • NRZ modulation
  • Optical communications
  • Optical solitons
  • Q-factor
  • WDM

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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