Field demonstration of 1 Tb/s superchannel transmission supported by probabilistic shaped constellations

We have introduced a low cost backbone network architecture for 1-Tb/s superchannel transmission. To meet huge reach requirements in case of link failure we applied improved sensitivity probabilistic shaped constellations in a flex transponder application. For all distances of working paths up to 1000 km we successfully demonstrated 1-Tb/s transmission with spectral efficiencies up to 6.7 Gb/s/Hz. For protection path at higest distances around 2000 km the rate has been adjusted down to 800 km, which is inline with the protection concept. This rate is limited due to spectral efficiency constraints given by the 400 GHz slicing concept, the transmission format itself is capable to go even 2000 km at terabit capacities.