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Towards a compact atomic clock based on coherent population trapping and the grating magneto-optical trap
Author(s): Gregory W. Hoth; Rachel Elvin; Michael Wright; Ben Lewis; Aidan S. Arnold; Paul F. Griffin; Erling Riis
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Paper 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.

Paper Details

Date Published: 1 March 2019
PDF: 8 pages
Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109342E (1 March 2019); doi: 10.1117/12.2516612
Show Author Affiliations
Gregory W. Hoth, Univ. of Strathclyde (United Kingdom)
Rachel Elvin, Univ. of Strathclyde (United Kingdom)
Michael Wright, Univ. of Strathclyde (United Kingdom)
Ben Lewis, Univ. of Strathclyde (United Kingdom)
Aidan S. Arnold, Univ. of Strathclyde (United Kingdom)
Paul F. Griffin, Univ. of Strathclyde (United Kingdom)
Erling Riis, Univ. of Strathclyde (United Kingdom)


Published in SPIE Proceedings Vol. 10934:
Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology
Selim M. Shahriar; Jacob Scheuer, Editor(s)

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