Octave-spanning frequency comb generation in a silicon nitride chip
Abstract
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.
- Publication:
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Optics Letters
- Pub Date:
- September 2011
- DOI:
- 10.1364/OL.36.003398
- arXiv:
- arXiv:1107.5555
- Bibcode:
- 2011OptL...36.3398O
- Keywords:
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- Physics - Optics
- E-Print:
- doi:10.1364/OL.36.003398