Abstract
The objective of this research is to propose two new optical procedures
for packet routing and forwarding in the framework of transparent optical
networks. The single-wavelength label-recognition and packet-forwarding unit,
which represents the central physical constituent of the switching node, is
fully described in both cases. The first architecture is a hybrid opto-electronic
structure relying on an optical serial-to- parallel converter designed to
slow down the label processing. The remaining switching operations are done
electronically. The routing system remains transparent for the packet payloads.
The second architecture is an all-optical architecture and is based on the
implementation of all-optical decoding of the parallelized label. The packet-forwarding
operations are done optically. The major subsystems required in both of the
proposed architectures are described on the basis of nonlinear effects in
semiconductor optical amplifiers. The experimental results are compatible
with the integration of the whole architecture. Those subsystems are a 4-bit
time-to-wavelength converter, a pulse extraction circuit, a an optical wavelength
generator, a 3 x 8
all-optical decoder and a packet envelope detector.
© 2008 IEEE
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