Measurement of fundamental thermal noise limit in a cryogenic sapphire frequency standard using bimodal maser oscillations

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dc.creatorBenmessai, Karim
dc.creatorCreedon, Daniel Lloyd
dc.creatorTobar, Michael Edmund
dc.creatorBourgeois, Pierre-Yves
dc.creatorKersale, Yann
dc.creatorGiordano, Vincent
dc.date2008-07-16
dc.date.accessioned2026-07-07T09:50:44Z
dc.date.available2026-07-07T09:50:44Z
dc.descriptionWe report observations of the Schawlow-Townes noise limit in a cryogenic sapphire secondary frequency standard. The effect causes a fundamental limit to the frequency stability, and was measured through the novel excitation of a bimodal maser oscillation of a Whispering Gallery doublet at $12.04 GHz$. The beat frequency of $10 kHz$ between the oscillations enabled a sensitive probe for this measurement of fractional frequency instability of $10^{-14}τ^{-1/2}$ with only 0.5 $pW$ of output power.
dc.descriptionPublished in PRL 100, 233901 (2008)
dc.identifierhttps://arxiv.org/abs/0807.2582
dc.identifierhttp://arxiv.org/abs/0807.2582
dc.identifierPRL 100, 233901 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.233901
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/165045
dc.subjectAtomic Physics
dc.subjectOptics
dc.titleMeasurement of fundamental thermal noise limit in a cryogenic sapphire frequency standard using bimodal maser oscillations
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