1.14 b/s/Hz spectrally efficient 50 × 85.4-Gb/s transmission over 300 km using copolarized RZ-DQPSK signals

Noboru Yoshikane*, Itsuro Morita

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

1.14 b/s/Hz spectrally efficient 50 × 85.4-Gb/s copolarized return-to-zero differential quarternary phase-shift keying (RZ-DQPSK) signals have been transmitted over 300 km of nonzero dispersion-shifted fiber (NZ-DSF), using optical prefiltering and conventional C-band erbium-doped fiber amplifier (EDFA) repeaters. In this study, in order to enhance the spectral efficiency, the impact of optical prefiltering on the RZ-DQPSK signal was experimentally investigated in comparison to the DQPSK signal, and we found that the RZ-DQPSK signal had better sensitivity with almost the same nonlinear tolerance than the DQPSK signal even with 65-GHz bandwidth optical prefiltering.

Original languageEnglish
Pages (from-to)108-114
Number of pages7
JournalJournal of Lightwave Technology
Volume23
Issue number1
DOIs
Publication statusPublished - 2005 Jan
Externally publishedYes

Keywords

  • Copolarized signals
  • Optical prefiltering
  • Return-to-zero differential quaternary phase-shift keying (RZ-DQPSK)
  • Spectral efficiency
  • Wavelength-division multiplexing (WDM)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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