Cryogenic sapphire oscillator with exceptionally high long-term frequency stability

Abstract

We report on the development of a sapphire cryogenic microwave resonator oscillator long-term fractional frequency stability of 2x10^-17Sqrt[τ] for integration times τ>10^3 s and negative drift of about 2.2x10^-15/day. The short-term frequency instability of the oscillator is highly reproducible and also state-of-the-art: 5.6x10^-16 for an integration time of τ~ 20 s.

Accepted for publication in Applied Physics Letters

References in corpus (1)

• Test of Lorentz Invariance in Electrodynamics Using Rotating Cryogenic Sapphire Microwave Oscillators

Cited by in corpus (4)

• Adapting a Cryogenic Sapphire Oscillator for Very Long Baseline Interferometry
• Measurement of fundamental thermal noise limit in a cryogenic sapphire frequency standard using bimodal maser oscillations
• Discovery of Bragg confined hybrid modes with high Q-factor in a hollow dielectric resonator
• The stability of an optical clock laser transferred to the interrogation oscillator for a Cs fountain