<p><a href="http://www.osa-jon.org/virtual_issue.cfm?vid=26">Feature Issue on Photonics in Switching</a></p>Optical packet switch (OPS) architectures with multifiber interfaces are considered here to combine space, wavelength, and time domain contention resolution. The switch is equipped with fiber delay lines as well as a pool of tunable wavelength converters that can be shared within the node or the single interface. Contention resolution algorithms can exploit space, wavelength, and time domains. In particular, the proposed multifiber solution, consisting of a bundle of fibers for each interface, allows isolating output wavelengths on each fiber and repeating them on different fibers. As a consequence, the wavelength converters employed become easier to implement due to the narrower bandwidth required for each of them. These architectures also allow implementing quality-of-service mechanisms to obtain an application related performance. Packet loss evaluation is obtained via simulation and analysis in the special case of bufferless design. The advantages of the proposed solution in terms of both performance and cost saving are shown.
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