Journal article
Demonstration of output-port contention resolution in a WDM switching node based on all-optical wavelength shifting and subcarrier-multiplexed routing-control headers
W Shieh, E Park, AE Willner
IEEE Photonics Technology Letters | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Published : 1997
DOI: 10.1109/68.593387
Abstract
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.