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

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physics.atom-ph2008★ 36 cited

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

Karim Benmessai, Daniel Lloyd Creedon, Michael Edmund Tobar +3

We 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, an…