Demonstration of output-port contention resolution in a WDM switching node based on all-optical wavelength shifting and subcarrier-multiplexed routing-control headers

We demonstrate near-error-free output-port contention resolution in a WDM switching node based on all optical wavelength shifting. Contention between incoming 1-Gb/s data packets is resolved in real-time by comparing subcarrier-multiplexed control headers on 2 input ports and then all-optically wavelength-shifting one input signal to a free wavelength if contention occurs. Additionally, the 50-Mb/s subcarrier header itself is replaced and updated with new routing information.

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