All-optical header recognition using a tree-structure is reported for a three-bit address. Each bit of a three bit header is
read using an optical Sagnac AND gate and the outcome is used to control each level of the three level tree-structure
switch. Traffic at 10 Gb/s (payload) is directed through the switch and each possible address outcome is validated.
Reflective semiconductor optical amplifiers (RSOAs) are used as the 1 x 2 space switch at each node of the tree-structure
switch. A noise propagation analysis that considers mostly amplified spontaneous emission noise is presented. This
analysis takes into account the saturation power of the SOAs, their noise figure, the gain of each SOA and the coupled
optical power. It is concluded that large switches based on semiconductor optical amplifiers can be constructed using
Contention resolution is one of the major design challenges in scaling the current packet switching architectures toward
handling higher loads and different classes of traffic. This article explores an evolutionary path in packet switching
technology toward Quantum Switching paradigm based on the principles of Quantum Information Processing, as a
radical approach in addressing the contention resolution issue.