400-Gb/s and 1-Tb/s superchannels using multi-carrier no-guard-interval coherent OFDM

We review the principles of generation, detection, and transmission of multi-carrier superchannels based on no-guard-interval coherent optical orthogonal frequency division multiplexing (NGI-CO-OFDM). We illustrate our findings with performances of 1.2-Tb/s 24-carrier and 450-Gb/s 9-carrier NGI-CO-OFDM superchannels with polarization-division-multiplexed quadrature phase-shift keyed carrier modulation.