All-optical demultiplexing of 640-Gb/s OTDM-DPSK signal using a semiconductor SMZ switch

Toshihiko Hirooka, Masatada Okazaki, Toshiyuki Hirano, Pengyu Guan, Masataka Nakazawa, Shigeru Nakamura

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


The all-optical demultiplexing of a 640-Gb/s singlepolarization optical time-division-multiplexing signal is successfully demonstrated by using a symmetric Mach-Zehnder switch incorporating semiconductor optical amplifiers. An ultrafast switching gate as narrow as 1.4 ps is realized by using a low-jitter, subpicosecond pulse train as a control pulse, which facilitates low-penalty demultiplexing.

Original languageEnglish
Article number33
Pages (from-to)1574-1576
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number20
Publication statusPublished - 2009 Dec 1


  • High-speed optical pulse transmission
  • Optical demultiplexing
  • Optical time-division multiplexing (OTDM)
  • Semiconductor optical amplifier (SOA)
  • Symmetric Mach-Zehnder (SMZ) switch

ASJC Scopus subject areas

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


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