2011/07/27 by Yoshitomo Okawachi, Kasturi Saha, Jacob S. Levy +3 · 1 citation
Physics and Astronomy · #physics.optics
paper · pdf · doi:10.1364/ol.36.003398
arxiv created 2011/07/27 · arxiv updated 2015/05/28
We demonstrate a frequency comb spanning an octave via the parametric process of cascaded four-wave mixing in a monolithic, high-Q silicon nitride microring resonator. The comb is generated from a single-frequency pump laser at 1562 nm and spans 128 THz with a spacing of 226 GHz, which can be tuned slightly with the pump power. In addition, we investigate the RF-noise characteristics of the parametric comb and find that the comb can operate in a low-noise state with a 30-dB reduction in noise as the pump frequency is tuned into the cavity resonance.