Separable integrated frequency control of a microcomb

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Abstract
The revolutionary impact of optical frequency combs in fields as diverse as timekeeping and spectroscopy hinges on a way to independently control comb line spacing and spectral position. However, achieving such control in microcombs remains challenging. In this work, we demonstrate separable control of these parameters in a microcomb using a single integrated actuation mechanism. As a proof of concept, we fully frequency-lock a microcomb to a high-stability reference cavity and apply it to spectroscopy and microwave generation. This approach significantly simplifies the implementation of frequency-stabilized microcombs across a broad range of applications.
Funding Information
  • National Aeronautics and Space Administration (NASA.23M0239, 80NM0018D0004)
  • Defense Advanced Research Projects Agency (HR0011-22-2-0009)
  • National Science Foundation (NSF.2238058)

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