New WDM channel rate records for transoceanic distances

We demonstrate single-carrier 518-Gb/s transceiver designed for 6600 km, single-carrier 420- Gb/s transceiver designed for 13200 km, and dual-carrier 1 Tb/s transceiver designed for 4000 km, leveraging high sampling rate CMOS DAC, probabilistic shaping and nonlinear mitigation.