1-Tb/s PDM-32QAM superchannel transmission at 6.7-b/s/Hz over SSMF and 150-GHz-grid ROADMs

We report on transmission of 1Tb/s superchannel occupying 150 GHz bandwidth under constraints of legacy optical networks. Using standard 50-GHz grid WSS, we assess the impact of filtering stemming from add/drop nodes over a 1Tb/s superchannel with 6.7-bit/s/Hz spectral efficiency.