Cascade of 100 optical 3R regenerators at 40 Gbit/s based on all-active Mach Zehnder interferometers

The operation of an optical 3R regenerator combining monolithic integrated semiconductor optical amplifier-based Mach Zehnder interferometers is demonstrated at 40 Gbit/s. 100 regenerators have been cascaded in a recirculation loop including 40 km of dispersion shifted fibre.