Accurate optical stabilization of a Kerr-microresonator frequency comb

Published: June 14, 2018


Travis Briles, Jordan R. Stone, Tara E. Drake, Daryl T. Spencer, Connor D. Fredrick, Qing Li, Daron A. Westly, Bojan R. Ilic, Kartik A. Srinivasan, Scott A. Diddams, Scott B. Papp


Carrier-envelope-phase stabilization of optical waveforms enables exquisitely precise measurements by way of direct optical-frequency synthesis, coherent optical-to-microwave phase conversion, and control of ultrafast waveforms. We report such phase stabilization for Kerr- microresonator frequency combs integrated on silicon chips, and verify their fractional- frequency inaccuracy at <3x10-16. Our work introduces an interlocked Kerr-comb configuration comprised of one silicon-nitride and one silica microresonator, which have rational multiple repetition frequencies but are generated from the same laser. These frequency combs support a new regime in ultrafast waveforms with 3 optical cycle, 1 ps roundtrip-duration soliton pulses and a total dispersive-wave bandwidth of 160 THz, while providing a stable phase-link between the optical- and microwave-frequency domains. To accommodate low-power and mobile application platforms, our phase-locked frequency-comb system operates with <250 mW of chip-coupled power. Our work establishes Kerr-microresonator comb technology for precision applications like optical atomic timekeeping, tunable optical synthesis, and numerous related directions.
Citation: Optica
Pub Type: Journals

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integrated photonics, microresonator, nonlinear nanophotonics, optical frequency combs, optical metrology
Created June 14, 2018, Updated February 21, 2019