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Modified gamma network and its optical implementation.

Y Wu, L Liu, Z Wang

    Applied Optics
    |September 24, 2010
    PubMed
    Summary
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    A modified optical gamma network uses new connection patterns for easier implementation. This rearrangeable nonblocking network is suitable for optical traffic and packet switching applications.

    Area of Science:

    • Optical networking
    • Interconnection networks
    • Switching systems

    Background:

    • Traditional gamma networks (O(N log(2)N)) use complex 1x3 or 3x3 switches, hindering optical realization.
    • Existing optical interconnection networks face challenges in scalability and implementation complexity.

    Purpose of the Study:

    • To propose a modified gamma network optimized for optical implementation.
    • To adapt the gamma network using specific connection patterns suitable for optical components.
    • To demonstrate a rearrangeable nonblocking optical network for synchronous optical traffic.

    Main Methods:

    • Modified the gamma network using bar-plus-2(i) and modulo-N connection patterns.
    • Employed 2x2 switches and regular interconnections for optical compatibility.

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  • Suggested an optical implementation using a birefringent crystal and programmable half-wave plates.
  • Presented a proof-of-principle experiment.

    • Main Results:

    • The modified network is suitable for optical implementation due to 2x2 switches and regular interconnections.
    • A nonblocking routing algorithm for N x N networks was developed.
    • The network achieves N-to-N permutations in (2 log(2)N - 2) stages with a specific number of switches.
    • Demonstrated feasibility through a proof-of-principle experiment.

    Conclusions:

    • The proposed modified gamma network is a viable and efficient optical interconnection solution.
    • The network's design is well-suited for optical components and synchronous optical traffic.
    • This work advances the development of practical optical switching networks.