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Proceedings Article

High-density optical interconnects within large-scale systems

[+] Author Affiliations
Christoph Berger, Marcel A. Kossel, Christian Menolfi, Thomas Morf, Thomas Toifl, Martin L. Schmatz

IBM Zurich Research Lab. (Switzerland)

Proc. SPIE 4942, VCSELs and Optical Interconnects, 222 (April 15, 2003); doi:10.1117/12.468494
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From Conference Volume 4942

  • VCSELs and Optical Interconnects
  • Hugo Thienpont; Jan Danckaert
  • Brugge, Belgium | October 28, 2002

abstract

Next-generation high-end data processing systems such as Internet switches or servers are approaching aggregate bandwidths in excess of 1 Terabit per second. In the case of Internet switches, the increase of fiber bandwidth that is caused by the introduction of Dense Wavelength Division Multiplexing leads to an increase of system size from single-shelf to multi-rack configurations. Intra-system interconnects will therefore span from centimeters (on-board) up to tens of meters (rack-to-rack). The task of providing hundreds of individual links at speeds in excess of 10 Gigabit per second over these distances becomes increasingly difficult for conventional copper-based technology. Using a packet switch system as an example application, we define a set of interconnect requirements for future large-scale systems. Distinguishing three interconnect classes (on-board, card-to-card over a backplane, rack-to-rack), we study the expected limits of copper-based solutions from an application point of view. After an overview of the state of the art in optical interconnect technology, we compare available technologies with the initially defined requirements. From this, we deduct key focus areas for future optical interconnect research. Finally, we present some of our recent activities in the field of waveguide and free-space based board-to-board interconnects.

© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Christoph Berger ; Marcel A. Kossel ; Christian Menolfi ; Thomas Morf ; Thomas Toifl, et al.
"High-density optical interconnects within large-scale systems", Proc. SPIE 4942, VCSELs and Optical Interconnects, 222 (April 15, 2003); doi:10.1117/12.468494; http://dx.doi.org/10.1117/12.468494


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