Invited Article: Design techniques and noise properties of ultrastable cryogenically cooled sapphire-dielectric resonator oscillators

Invited Article: Design techniques and noise properties of ultrastable cryogenically cooled sapphire-dielectric resonator oscillators

We review the techniques used in the design and construction of cryogenic sapphire oscillators at the University of Western Australia over the 18 year history of the project. We describe the project from its beginnings when sapphire oscillators were first developed as low-noise transducers for gravi...

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Veröffentlicht in:Review of scientific instruments 2008-05, Vol.79 (5), p.051301-051301-12
Hauptverfasser: Locke, C. R., Ivanov, E. N., Hartnett, J. G., Stanwix, P. L., Tobar, M. E.
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container_end_page 051301-12
container_issue 5
container_start_page 051301
container_title Review of scientific instruments
container_volume 79
creator Locke, C. R.
Ivanov, E. N.
Hartnett, J. G.
Stanwix, P. L.
Tobar, M. E.
description We review the techniques used in the design and construction of cryogenic sapphire oscillators at the University of Western Australia over the 18 year history of the project. We describe the project from its beginnings when sapphire oscillators were first developed as low-noise transducers for gravitational wave detection. Specifically, we describe the techniques that were applied to the construction of an interrogation oscillator for the PHARAO Cs atomic clock in CNES, in Toulouse France, and to the 2006 construction of four high performance oscillators for use at NMIJ and NICT, in Japan, as well as a permanent secondary frequency standard for the laboratory at UWA. Fractional-frequency fluctuations below 6 × 10 − 16 at integration times between 10 and 200 s have been repeatedly achieved.
doi_str_mv 10.1063/1.2919944
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title Invited Article: Design techniques and noise properties of ultrastable cryogenically cooled sapphire-dielectric resonator oscillators
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