12.8 Tbit/s (10 ch, 1.28 Tbit/s) OTDM-WDM Transmission of 320 Gbaud PDM-DQPSK Optical Nyquist Pulses over 1500 km

We report a 12.8-Tbit/s (10-ch, 1.28-Tbit/s), 320 Gbaud PDM-DQPSK transmission over 1500 km using optical Nyquist pulses. A BER below a 20%-overhead FEC threshold (2×10
^-2
) was successfully achieved for all WDM channels and OTDM tributaries.