Coexistence Transmission of 33.4-Tb/s O-band Coherent Classical Channels and a C-band QKD Channel over 80 km

A record data transmission capacity of $33.4 \mathrm{~Tb} / \mathrm{s}$ over 80 km is achieved in quantum-classical channel coexistence transmission by multiplexing 13.1-THz O-band coherent classical channels with a C-band DV-QKD channel.