Impact of microwave-field inhomogeneity in an alkali vapour cell using Ramsey double-resonance spectroscopy
Willam Moreno, Christoph Affolderbach, Matthieu Pellaton & Gaetano Mileti
| Résumé |
We numerically and experimentally evaluate the impact of the
inhomogeneity of the microwave field in the cavity used to perform
double-resonance (DR) Ramsey spectroscopy in a buffer gas alkali
vapour cell. The Ramsey spectrum is numerically simulated using a
simple theoretical model and taking into account the field
distribution in a magnetron-type microwave resonator. An
experimental evaluation is performed using a DR pulsed optically
pumped (POP) atomic clock. It is shown that the sensitivity to the
microwave power of the DR POP clock can be reproduced from the
combination of two inhomogeneities across the vapour cell:
microwave field inhomogeneity and atomic ground-state resonance
frequency inhomogeneity. Finally, we present the existence of an
optimum operation point for which the microwave power sensitivity
of our DR POP clock is reduced by two orders of magnitude. It leads
into a long-term frequency stability of 1 × 10−14. |
| Mots-clés |
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| Citation | W. Moreno, et al., "Impact of microwave-field inhomogeneity in an alkali vapour cell using Ramsey double-resonance spectroscopy," Quantum Electronics, vol. 49, p. 1-1, Oct. 2018. |
| Type | Article de périodique (Anglais) |
| Date de publication | 24-10-2018 |
| Nom du périodique | Quantum Electronics |
| Volume | 49 |
| Numéro | 3 |
| Pages | 1-1 |
| URL | https://doi.org/10.1070/QEL16883 |