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2×2 buffered switch fabrics for traffic routing, merging, and shaping in photonic cell networks

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7 Author(s)
D. K. Hunter ; Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK ; D. Cotter ; R. B. Ahmad ; W. D. Cornwell
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An approach to optical packet switching is discussed, which uses small, simplified optical elements for traffic routing, merging, and shaping. The elements are constructed from 2×2 switches and optical delay lines, and may be implemented in a variety of technologies. They are designed for use with deflection routing, and even when using only six switches in a module, a deflection probability of 2.8×10-7 is possible with a load of 0.8. The modules may also be used as 2×1 mergers where a deflection probability of 10-12 is possible with six switches and a total load of 0.8. The BER performance of the modules is simulated with respect to crosstalk, with even relatively poor switch devices of -18.5 dB isolation yielding a power penalty of less than 1 dB. A networking strategy radically different from today's is discussed, driven by the need to reduce hardware, software and operating costs

Published in:

Journal of Lightwave Technology  (Volume:15 ,  Issue: 1 )