Towards Sr shelving spectroscopy based in microfabricated vapor cells

ORAL

Abstract

The 7 kHz Sr intercombination line at 689 nm could be used to implement an optical clock with a frequency instability below 10-13 at 1s. Optical “shelving” detection provides a simple scheme to detect the 7 kHz transition in hot Sr vapors, making it possible to miniaturize the clock with the help of a microfabricated vapor cell. To perform shelving spectroscopy, a narrow linewidth laser at 689nm of the Sr intercombination line is needed. We achieved this by phase locking the 689 nm laser to a frequency comb. A 461 nm laser probing the 1S0 to 1P1 transition is frequency locked using saturation absorption spectroscopy. We will report on the progress of using the two lasers for shelving spectroscopy in a microfabricated Sr vapor cell.

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Presenters

  • Yang Li

    National Institute of Standards and Technology

Authors

  • Yang Li

    National Institute of Standards and Technology

  • Samuel Porter

    University of Colorado Boulder

  • John E Kitching

    National Institute of Standards and Technology (NIST), National Institute of Standards and Technology Boulder

  • Matthew T Hummon

    National Institute of Standards and Technology Boulder