Work

Active compensation of the ac Stark shift in a two-photon rubidium optical frequency reference using power modulation

Year: 2026

Type: article

Abstract: We implement a feedback protocol to suppress the ac Stark shift in a two-photon rubidium optical frequency reference, reducing its sensitivity to optical power variations by a factor of 1000. This method alleviates the tradeoff between short-term and long-term stability imposed by the ac Stark shift, enabling us to simultaneously achieve instabilities of 3 × 10 − 14 at 1 s and 2 × 10 − 14 at 10 4 s. We also quantitatively describe, and experimentally explore, a stability limit imposed on clocks using this method by frequency noise on the local oscillator.

Source: Physical Review Applied

DOI: 10.1103/25md-vv43

Authors: Yorick Andeweg, John Kitching, Matthew T. Hummon

Institutions: National Institute of Standards and Technology, University of Colorado Boulder

Language: English

Topic: Advanced Frequency and Time Standards

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Institute of Standards and Technology, University of Colorado Boulder, Office of Naval Research

OpenAlex ID: W4416766019

FWCI: 2.844

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Cited by: 1

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