10 Tb/s self-homodyne 64-QAM superchannel transmission with 4% spectral overhead

We use a 10 nm frequency comb to transmit a 10 Tb/s 50×20 GBaud PM-64QAM super-channel over 80 km SMF. Using two unmodulated carriers we regenerate a phase locked receiver comb, enabling self-homodyne detection with record-low spectral overhead.