160-Gb/s all-optical packet-switching with in-band filter-based label extraction and a hybrid-integrated optical flip-flop

Abstract—An in-band labeling scheme with filter-based label ex-traction is employed for very high-speed optical packet-switching. The scheme shows a potentially high scalability, up to 25 labels in a 5-nm bandwidth packet using commercial arrayed waveguide gratings as the label processor. Switching is demonstrated using packets with two different 9-ns labels, 6.4- and 4.6-ns guard times, and 56.8-ns payload at 160 Gb/s. The system uses a tunable optical filter as the label extractor, a hybrid integrated optical flip-flop, and a high-speed semiconductor-optical-amplifier-based wave-length converter. Error-free operation is achieved with acceptable error penalties. Index Terms—Label extraction, optical flip-flop, packet-switching, semiconductor optical amplifier (SOA), wavelength conversion. I