Cryogenic-Sapphire-Oscillator-Based Reference Signal at 1 GHz with $10^{-15}$ Level Instability
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概要
- 論文の詳細を見る
We describe a 1 GHz reference signal with $10^{-15}$ level fractional frequency stability for averaging times longer than 1 s, synthesized from a 10.8 GHz oscillation frequency of a cryogenic-sapphire-resonator-based ultra-stable oscillator and phase locked to a hydrogen maser with a time constant of about 1000 s. The degradation of the short term stability of the reference signal by phase locking to the hydrogen maser was evaluated. We also report on the implementation of the 1 GHz signal down converted to 5 MHz as a reference oscillator for a cesium atomic fountain frequency standard.
- 2008-09-25
著者
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Ohshima Shin-ichi
National Metology Institute Of Japan
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Watabe Ken-ichi
National Metology Institute Of Japan
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HARTNETT John
School of Physics, The University of Western Australia
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Ikegami Takeshi
National Metology Institute Of Japan/aist
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Locke Clayton
School of Physics, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia
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Locke Clayton
School of Physics, University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
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Yanagimachi Shinya
National Metrology Institute of Japan (NMIJ), AIST, Tsukuba, Ibaraki 305-8563, Japan
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Yanagimachi Shinya
National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8563, Japan
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Santarelli Giorgio
Laboratoire National d'Essais-Système de Références Temps-Espace (LNE-SYRTE), Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France
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Takamizawa Akifumi
National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8563, Japan
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Watabe Ken-ichi
National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8563, Japan
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Ohshima Shin-ichi
National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8563, Japan
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Ikegami Takeshi
National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8563, Japan
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Hartnett John
School of Physics, University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
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