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research article

mu POP Clock: A Microcell Atomic Clock Based on a Double-Resonance Ramsey Scheme

Batori, Etienne
•
Affolderbach, Christoph
•
Pellaton, Matthieu
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November 14, 2022
Physical Review Applied

We demonstrate and study a microcell microwave atomic clock based on optical-microwave double resonance (DR) interrogation operated in a pulsed Ramsey scheme, called the mu POP clock, based on a microfabricated Rb vapor cell and a micro-loop-gap microwave resonator. For the mm-scale dimensions of this cell, the population and coherence relaxation rates of the Rb clock transition are on the order of 4-5 kHz, which puts constraints on the useful Ramsey times and overall pulse sequence in view of optimized clock performance. Our proof-of-principle demonstration of the mu POP clock shows that the pulsed DR approach is nevertheless feasible and results in a short-term clock stability of 1 x 10(-11) tau(-1/2) and reaching the <= 2 x 10(-12) level at timescales of 1000 s to one day. The short-term instability budget established for the mu POP clock shows that the main limitation to the short-term stability arises from the detection noise. Thanks to the pulsed Ramsey scheme, light-shift effects are strongly reduced in the mu POP clock, which opens perspectives for further improvements of long-term clock stability, in view of future generations of miniature vapor-cell clocks with enhanced performances based on the DR scheme.

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Type
research article
DOI
10.1103/PhysRevApplied.18.054039
Web of Science ID

WOS:000934818600002

Author(s)
Batori, Etienne
•
Affolderbach, Christoph
•
Pellaton, Matthieu
•
Gruet, Florian
•
Violetti, Maddalena  
•
Su, Yuanyan  
•
Skrivervik, Anja K.  
•
Mileti, Gaetano
Date Issued

2022-11-14

Publisher

AMER PHYSICAL SOC

Published in
Physical Review Applied
Volume

18

Issue

5

Article Number

054039

Subjects

Physics, Applied

•

Physics

•

rb clock

•

rubidium

•

spectroscopy

•

compact

•

cavity

•

noise

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-STI-AS  
Available on Infoscience
March 13, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/195750
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