25.6-Tb/s WDM transmission of polarization-multiplexed RZ-DQPSK signals

Alan H. Gnauck*, Gabriel Charlet, Patrice Tran, Peter J. Winzer, Christopher R. Doerr, J. C. Centanni, E. C. Burrows, Tetsuya Kawanishi, Takahide Sakamoto, Kaoru Higuma

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

136 Citations (Scopus)


We demonstrate record 25.6-Tb/s transmission over 240 km using 160 WDM channels on a 50-GHz grid in the C+L bands. Each channel contains two polarization-multiplexed 85.4-Gb/s RZ-DQPSK signals, yielding a spectral efficiency of 3.2 b/s/Hz in each band.

Original languageEnglish
Pages (from-to)79-84
Number of pages6
JournalJournal of Lightwave Technology
Issue number1
Publication statusPublished - 2008 Jan 1
Externally publishedYes


  • Differential quadrature phase shift keying
  • High spectral efficiency
  • Modulation formats
  • Optical fiber communications
  • Optical modulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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