Comparison of optical and electrical links for highly-interconnected systems

James Kruchowski, Vladimir Sokolov, Nathan E. Harff, Mark A. Nelson, K. Y. Liou, Graham Cameron, Barry K. Gilbert, Erik S. Daniel

Research output: Chapter in Book/Report/Conference proceedingConference contribution


As data rates for multi-gigabit serial interfaces within multi-node compute systems approach and exceed 10 Gigabits per second (Gbps), board-to-board and chip-to-chip optical signaling solutions become more attractive, particularly for longer (e.g. 50-100 cm) links. The transition to optical signaling will potentially allow new high performance compute (HPC) system architectures that benefit from characteristics unique to optical links. To examine these characteristics, we built and tested several optical demonstration vehicles; one based on dense wavelength division multiplexing (DWDM), and others based on multiple point-to-point links carried across multimode fibers. All test vehicles were constructed to evaluate applicability to a multi-node compute system. Test results, combined with data from recent research efforts are summarized and compared to equivalent electrical links and the advantages and design characteristics unique to optical signaling are identified.

Original languageEnglish (US)
Title of host publicationDesignCon 2011
Number of pages25
StatePublished - 2011
EventDesignCon 2011 - Santa Clara, CA, United States
Duration: Jan 31 2011Feb 3 2011

Publication series

NameDesignCon 2011


OtherDesignCon 2011
Country/TerritoryUnited States
CitySanta Clara, CA

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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