Journal
OPTICS LETTERS
Volume 43, Issue 12, Pages 2933-2936Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.002933
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Funding
- Defense Advanced Research Projects Agency (DARPA) (DODOS)
- Air Force Office of Scientific Research (AFOSR) [FA9550-16-1-0016]
- National Institute of Standards and Technology (NIST)
- NRC
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We report accurate phase stabilization of an interlocking pair of Kerr-microresonator frequency combs. The two combs, one based on silicon nitride and one on silica, feature nearly harmonic repetition frequencies and can be generated with one laser. The silicon-nitride comb supports an ultrafast-laser regime with three-optical-cycle, 1-picosecond-period soliton pulses and a total dispersive-wave-enhanced bandwidth of 170 THz, while providing a stable phase-link between optical and microwave frequencies. We demonstrate nanofabrication control of the silicon-nitride comb's carrier-envelope offset frequency and spectral profile. The phase-locked combs coherently reproduce their clock with a fractional precision of <6 x 10(-13)/tau, a behavior we verified through 2 h of measurement to reach <3 x 10(-16). Our work establishes Kerr combs as a viable technology for applications like optical-atomic timekeeping and optical synchronization. (C) 2018 Optical Society of America
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