Abstract
The scaling of the capacity of a semiconductor-optical-amplifier-based switch carrying wavelength-striped data
is assessed under packet timescale reconfiguration for short-reach high-capacity data interconnects. Off-the-shelf
components are used with a low-complexity control layer to demonstrate high-capacity end-to-end packet routing. The
impact of increasing the aggregate data rate and the number of connections made to the switch fabric is assessed in
terms of the power penalty and dynamic range for a broadcast and select architecture. Studies with up to ten
wavelength-multiplexed data channels with an aggregate capacity of 100 Gb/s are shown to give sufficient margin for
even higher aggregate data rates and for the additional splitter stages, which would enable 8
x 8 connectivity in a single stage. Further increases in
connectivity are anticipated with higher performance commercially available transmitters and receivers. Multipath
routing is assessed with three hosts simultaneously transmitting wavelength-striped data packets over the same
switch fabric to reveal a penalty in the range of 0.3–0.6 dB due to multipath crosstalk and a modest penalty
in the range of 0.4–1.2 dB that was incurred through dynamic routing. A route to terabit-per-second switch
performance in a single-stage low-complexity switch fabric is identified.
© 2007 IEEE
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