Long-Term Stability Analysis Towards < 10-14 Level for a Highly Compact POP Rb Cell Atomic Clock
Nil Almat, Mohammadreza Gharavipour, Willam Moreno, Florian Gruet, Christoph Affolderbach & Gaetano Mileti
| Résumé |
Long-term frequency instabilities in vapor-cell clocks mainly arise
from fluctuations of the experimental and environmental parameters
that are converted to clock frequency fluctuations via various
physical processes. Here, we discuss the frequency sensitivities
and the resulting stability limitations at one day timescale for a
rubidium vapor-cell clock based on a compact magnetron-type cavity
operated in air (no vacuum environment). Under ambient laboratory
conditions, the external atmospheric pressure fluctuations may
dominantly limit the clock stability via the barometric effect. We
establish a complete long-term instability budget for our clock
operated under stable pressure conditions. Where possible, the
fluctuations of experimental parameters are measured via the atomic
response. The measured clock instability of < 2·E10.14 at one day is
limited by the intensity light-shift effect, which could further be
reduced by active stabilization of the laser intensity or stronger
optical pumping. The analyses reported here show the way towards
simple, compact, and low-power vapor-cell atomic clocks with
excellent long-term stabilities. ≤ 10.14 at one day when
operated in ambient laboratory conditions. |
| Mots-clés |
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| Citation | N. Almat, et al., "Long-Term Stability Analysis Towards < 10-14 Level for a Highly Compact POP Rb Cell Atomic Clock," IEEE Tran. on Ultrasonics, Ferroelectronics and Frequency Control, vol. 1, p. 1-1, Sept. 2019. |
| Type | Article de périodique (Anglais) |
| Date de publication | 12-9-2019 |
| Nom du périodique | IEEE Tran. on Ultrasonics, Ferroelectronics and Frequency Control |
| Volume | 1 |
| Pages | 1-1 |
| URL | https://doi.org/10.1109/TUFFC.2019.2940903 |