Towards a compact atomic clock based on coherent population trapping and the grating magneto-optical trap

Gregory W. Hoth; Rachel Elvin; Michael Wright; Ben Lewis; Aidan S. Arnold; Paul F. Griffin; Erling Riis

doi:10.1117/12.2516612

1 March 2019 Towards a compact atomic clock based on coherent population trapping and the grating magneto-optical trap

Gregory W. Hoth, Rachel Elvin, Michael Wright, Ben Lewis, Aidan S. Arnold, Paul F. Griffin, Erling Riis

Proceedings Volume 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology; 109342E (2019) https://doi.org/10.1117/12.2516612
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

The combination of coherent population trapping (CPT) and laser cooled atoms is a promising platform for realizing the next generation of compact atomic frequency references. Towards this goal, we have developed an apparatus based on the grating magneto-optical trap (GMOT) and the high-contrast lin ⊥ lin CPT scheme in order to explore the performance that can be achieved. One important trade-off for cold-atom systems arises from the need to simultaneously maximize the number of cold atoms available for interrogation and the repetition rate of the system. This compromise can be mitigated by recapturing cold atoms from cycle to cycle. Here, we report a quantitative characterization of the cold atom number in the recapture regime for our system, which will enable us to optimize this trade-off. We also report recent measurements of the short-term frequency stability with a short-term Allan deviation of 3 × 10^-11/τ up to an averaging time of τ = 10 s.

Citation Download Citation

Gregory W. Hoth, Rachel Elvin, Michael Wright, Ben Lewis, Aidan S. Arnold, Paul F. Griffin, and Erling Riis "Towards a compact atomic clock based on coherent population trapping and the grating magneto-optical trap", Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109342E (1 March 2019); https://doi.org/10.1117/12.2516612

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