© 2015 OSA. We demonstrate for the first time Tbit/s transmission using Q-Dash mode-locked laser sources with FSR of 44.7 and 22.7GHz. The aggregate capacities achieved were 1.128Tb/s for 44.7GHz and 2.256Tb/s for 22.7GHz Q-Dash PMLL using IM/DD-SSB-OFDM.