Hybrid photonic integration with passive assembly techniques allows compact optical modules to be realised with high
optical performance and low packaging cost. Recent advances in integrating semiconductor optical amplifiers into
practical all-optical signal processing modules is described, with applications from optical memory to sophisticated
burst-mode optical regenerators.
We present the results of a transmission experiment, over 110 km of field installed fiber, for an all-optical 160 Gb/s
packet switching system. The system uses in-band optical labels which are processed entirely in the optical domain
using a narrow-band all-optical filter. The label decision information is stored by an optical flip-flop, which output
controls a high-speed wavelength converter based on ultra-fast cross-phase modulation in a single semiconductor optical
amplifier. The packet switched node is located in between two different fiber sections, each having a length of 54.3-km.
The field installed fibers are located around the city of Eindhoven in the Netherlands. The results show how the all-optical
switch can effectively route the packets based on the optical information and that such packets may be
transmitted across the fiber with an acceptable penalty level.
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