Energy-efficient Tbit s optical interconnects are key elements for future communication
systems. Three novel optical frequency comb sources are investigated which have the potential
of being integrated in chip-scale Tbit s transmitters. Such frequency combs provide a large
number of carriers. The equidistance of the comb lines helps to minimize spectral guard bands.
For each type of comb source coherent data transmission experiments show the potential for
Tbit s data transmission rates.
