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Dissipative solitons formed in Kerr microresonators may enable chip-scalefrequency combs for precision optical metrology. Here we explore the creationof an octave-spanning, 15-GHz repetition-rate microcomb suitable for both f-2fself-referencing and optical-frequency comparisons across the near infrared.This is achieved through a simple and reliable approach to deterministicallygenerate, and subsequently frequency stabilize, soliton pulse trains in asilica-disk resonator. Efficient silicon-nitride waveguides provide asupercontinuum spanning 700 to 2100 nm, enabling both offset-frequencystabilization and optical-frequency measurements with >100 nW per mode. Wedemonstrate the stabilized comb by performing a microcomb-mediated comparisonof two ultrastable optical-reference cavities.

Optical-frequency measurements with a Kerr-microcomb and photonic-chip supercontinuum