Comparison between polarization-multiplexed DPSK and single-polarization DQPSK in 640 Gbaud, 1.28 Tbit/s-500 km single-channel transmission

Yutaro Tomiyama, Koudai Harako, Pengyu Guan, Toshihiko Hirooka, Masataka Nakazawa

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We describe two schemes for 1.28 Tbit/s single-channel transmission at 640 Gbaud with polarization-multiplexed DPSK and single-polarization DQPSK, and compare their performance in a 500 km transmission. We found that the polarization multiplexing of ultrahigh-speed DPSK signals, for example at 640 Gbaud, is sensitive to the PMD characteristics of the transmission link. Even when first-order PMD is fully compensated, second-order PMD, which varies over a long period and is difficult to compensate, results in inter-polarization crosstalk induced by depolarization. The single-polarization transmission of a 640 Gbaud DQPSK signal is less vulnerable to PMD and therefore more stable, as the depolarized components induced by second-order PMD can be easily rejected with a polarizer. However, its performance is limited because the OSNR must be higher than for DPSK.

Original languageEnglish
Pages (from-to)439-444
Number of pages6
JournalOptical Fiber Technology
Volume17
Issue number5
DOIs
Publication statusPublished - 2011 Jan 1

Keywords

  • Differential phase shift keying
  • Differential quadrature phase shift keying
  • High-speed optical pulse transmission
  • Optical time division multiplexing
  • Polarization multiplexing
  • Polarization-mode dispersion
  • Ultrashort optical pulse

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

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