Marked increase in power margin through the use of dispersion-allocated soliton and evaluation of transmission characteristics using Q map: Comparison between D-A soliton, NRZ pulse, and RZ pulse at zero GVD

Masataka Nakazawa, Akio Sahara, Hirokazu Kubota

Research output: Contribution to journalReview articlepeer-review

Abstract

When fiber routes for optical soliton transmissions are dispersion allocated, higher order solitons cannot be formed even at power levels reaching the higher-order soliton power determined by the average dispersion, since the group velocity dispersion (GVD) in the individual fiber is large and the phase matching necessary to form higherorder solitons cannot be obtained. Therefore, solitons with intensity higher than that of N = 1 can still be propagated with a simple and clean pulse waveform without splitting. In this paper, it is first shown that the power margin of the dispersion-allocated (D-A) soliton is 6-9.5 dB larger than that of the soliton with a uniform GVD. Next, a new method (Q map method) for the evaluation of optical transmission systems using the Q value is described, which indicates the signal-to-noise ratio of the received eye pattern. By using this method, the power margins and dispersion tolerances of the soliton, NRZ, and zero-dispersion RZ pulse transmissions are discussed and it is found that the D-A soliton transmission has the highest power margin.

Original languageEnglish
Pages (from-to)17-27
Number of pages11
JournalElectronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume80
Issue number12
DOIs
Publication statusPublished - 1997 Dec
Externally publishedYes

Keywords

  • Dispersion allocation
  • Group velocity dispersion
  • Nonlinear optical effect
  • Optical fiber amplifier
  • Optical soliton

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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