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We demonstrate seamless channel multiplexing and high bitrate superchanneltransmission of coherent optical orthogonal-frequency-division-multiplexing(CO-OFDM) data signals utilizing a dissipative Kerr soliton (DKS) frequencycomb generated in an on-chip microcavity. Aided by comb line multiplicationthrough Nyquist pulse modulation, the high stability and mutual coherence amongmode-locked Kerr comb lines are exploited for the first time to eliminate theguard intervals between communication channels and achieve full spectraldensity bandwidth utilization. Spectral efficiency as high as 2.625 bit/Hz/s isobtained for 180 CO-OFDM bands encoded with 12.75 Gbaud 8-QAM data, adding upto total bitrate of 6.885 Tb/s within 2.295 THz frequency comb bandwidth. Ourstudy confirms that high coherence is the key superiority of Kerr solitonfrequency combs over independent laser diodes, as a multi-spectral coherentlaser source for high-bandwidth high-spectral-density transmission networks.

Terabit optical OFDM superchannel transmission via coherent carriers of a hybrid chip-scale soliton frequency comb