© 2015 OSA. Chip-scale frequency comb sources are likely to become key elements of future terabit/s optical transceivers. We investigated and demonstrate the viability of different comb generation schemes for transmission at data rates beyond 1 Tbit/s. OCIS codes: (060.0060) Fiber optics and optical communications; (060.1660) Coherent communications; (190.4390) Nonlinear optics, integrated optics