Bandwidth scaling of a phase-modulated continuous-wave comb through four-wave mixing in a silicon nano-waveguide

Yang Liu, Andrew J. Metcalf, Victor Torres Company, Rui Wu, Li Fan, Leo T. Varghese, Minghao Qi, Andrew M. Weiner
2014 Optics Letters  
We demonstrate an on-chip four-wave mixing (FWM) scheme in a silicon nanowaveguide to scale the bandwidth of a frequency comb generated by phase modulation of continuous-wave (CW) lasers. The FWM process doubles the bandwidth of the initial comb generated by the modulation of a CW laser. For example, a wavelength-tunable frequency comb with >100 comb lines spaced by 10 GHz within a bandwidth of 5 dB is generated.
doi:10.1364/ol.39.006478 pmid:25490498 fatcat:ikbzlcei4jgznlsbz4fmb6dafu