Cold-atom-based commercial microwave clock at the 10<sup>−15</sup> level

Pelle, Bruno; Szmuk, Ramon; Desruelle, Bruno; Holleville, David

doi:10.1109/fcs.2017.8088932

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…After many years of development, atomic clocks based on laser cooled atoms are beginning to be made commercially. [1][2][3] These commercial cold-atom clocks utilize microwave interrogation of the sample and achieve a short-term fractional frequency stability on the order of 10 −13 / √ τ with the ability to average down to the level of 3 × 10 −15 or better. The last two decades have also seen tremendous developments in atomic clocks based on optical interrogation of microwave atomic resonances via the coherent population trapping (CPT) technique.…”

Section: Introductionmentioning

confidence: 99%

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

Hoth

Elvin

Wright

et al. 2019

Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology

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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.

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Section: Introductionmentioning

confidence: 99%

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

Hoth

Elvin

Wright

et al. 2019

Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology

View full text Add to dashboard Cite

show abstract

Towards a compact, optically interrogated, cold-atom microwave clock

Elvin

Wright

Lewis

et al. 2019

Advanced Optical Technologies

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A compact platform for cold atoms opens a range of exciting possibilities for portable, robust and accessible quantum sensors. In this work, we report on the development of a cold-atom microwave clock in a small package. Our work utilises the grating magneto-optical trap and high-contrast coherent population trapping in the lin$\perp $lin polarisation scheme. We optically probe the atomic ground-state splitting of cold 87Rb atoms using a Ramsey-like sequence whilst the atoms are in free-fall. We have measured a short-term fractional frequency stability of $5{\times}{10}^{-13}/\sqrt{\tau }$ with a projected quantum projection noise limit at the ${10}^{-13}/\sqrt{\tau }$ level.

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Cold-atom-based commercial microwave clock at the 10⁻¹⁵ level

Cited by 2 publications

References 9 publications

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

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

Towards a compact, optically interrogated, cold-atom microwave clock

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Cold-atom-based commercial microwave clock at the 10−15 level

Cited by 2 publications

References 9 publications

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

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

Towards a compact, optically interrogated, cold-atom microwave clock

Contact Info

Product

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About

Cold-atom-based commercial microwave clock at the 10⁻¹⁵ level