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Updated: May 18, 2026

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Optimal wavelength-space crossbar switches for supercomputer optical interconnects.

Ioannis Roudas1, B Roe Hemenway, Richard R Grzybowski

  • 1Department of Electical & Computer Engineering, University of Patras, Rio 26504, Greece. roudas@ece.upatras.gr

Optics Express
|October 6, 2012
PubMed
Summary

We present an economical design for an all-optical switch fabric, the Optical Shared Memory Supercomputer Interconnect System (OSMOSIS). Its complexity scales as N ln N, matching theoretical lower bounds for efficient supercomputer interconnects.

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Area of Science:

  • Computer Science
  • Optical Networking
  • Supercomputing

Background:

  • Supercomputer interconnects are critical for high-performance computing.
  • Existing switch fabrics face scalability challenges.
  • All-optical solutions offer potential for higher bandwidth and lower latency.

Purpose of the Study:

  • To propose an economical design for an all-optical, wavelength-space crossbar switch fabric.
  • To analyze and simulate the complexity of the proposed switch fabric.
  • To compare the design's complexity with theoretical lower bounds.

Main Methods:

  • Design and theoretical analysis of an N x N all-optical, wavelength-space crossbar switch fabric.
  • Asymptotic complexity analysis based on factoring the number of ports N.

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  • Simulation to validate analytical findings.

    • Main Results:

    • The proposed Optical Shared Memory Supercomputer Interconnect System (OSMOSIS) fabric achieves an economical design.
    • Switch fabric complexity scales asymptotically as N ln N for factorable N.
    • This complexity is comparable to Shannon's lower bound for permutation switches.

    Conclusions:

    • The OSMOSIS design offers an efficient and scalable solution for all-optical supercomputer interconnects.
    • The N ln N complexity demonstrates a practical approach to minimizing switch gates.
    • This research contributes to the advancement of high-performance optical networking.