OPTIMA: Scalable, multi-stage, 640-Gbit/s ATM switching system based on advanced electronic and optical WDM technologies

Naoaki Yamanaka, Eiji Oki, Seisho Yasukawa, Ryusuke Kawano, Katsuhiko Okazaki

Research output: Contribution to journalArticle

9 Citations (Scopus)


An experimental 640-Gbit/s ATM switching system is described. The switching system is scalable and quasi-non-blocking and uses hardware self-rearrangement in a three-stage network. Hardware implementation results for the switching system are presented. The switching system is fabricated using advanced 0.25-μm CMOS devices, high-density multi-chipmodule (MCM) technology, and optical wavelength-division-multiplexing (WDM) interconnection technology. A scalable 80-Gbit/s switching module is fabricated in combination with a developed scalable-distributed-arbitration technique, and a WDM interconnection system that connects multiple 80-Gbit/s switching modules is developed. Using these components, an experimental 640-Gbit/s switching system is partially constructed. The 640-Gbit/s switching system will be applied to future broadband ATM networks.

Original languageEnglish
Pages (from-to)1488-1495
Number of pages8
JournalIEICE Transactions on Communications
Issue number7
Publication statusPublished - 2000
Externally publishedYes



  • ATM
  • Interconnection
  • Multi-chip module
  • Switch
  • WDM

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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