Reference Signal Synthesized from a Cryogenic Sapphire Oscillator Improved by Power Control Servo
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概要
- 論文の詳細を見る
Improvements in the frequency stability of a reference signal synthesized from a cryogenic sapphire oscillator (CSO) have been realized. This has been achieved by a power control servo with active Pound frequency stabilization in the loop oscillator based on a high $Q$-factor cryogenic sapphire resonator with a loaded $Q$-factor of $5 \times 10^{8}$ at 10.812 GHz and operating at a temperature of 6 K. The reference signal of 100 MHz was synthesized from the 10.812 GHz oscillation frequency. When compared with a 100 MHz hydrogen maser signal, the 100 MHz reference exhibited a fractional frequency stability of $5.6 \times 10^{-15}$ at an integration time of 510 s, which is approximately two times better than that without power servo control.
- 2006-04-15
著者
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Ohshima Shin-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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Ohshima Shin-ichi
National Metrology Institute of Japan/AIST, Tsukuba 305-8563, Japan
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Locke Clayton
School of Physics, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia
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Santarelli Giorgio
LNE-SYRTE, Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France
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Yanagimachi Shinya
National Metrology Institute of Japan (NMIJ), AIST, Tsukuba, Ibaraki 305-8563, Japan
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Shimazaki Takeshi
National Metrology Institute of Japan (NMIJ), AIST, Tsukuba, Ibaraki 305-8563, Japan
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Watabe Ken-ich
National Metrology Institute of Japan/AIST, Tsukuba 305-8563, Japan
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Shimazaki Takeshi
National Metrology Institute of Japan/AIST, Tsukuba 305-8563, Japan
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Yanagimachi Shinya
National Metrology Institute of Japan/AIST, Tsukuba 305-8563, Japan
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Santarelli Giorgio
LNE-SYRTE, Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France
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Watabe Ken-ichi
National Metrology Institute of Japan/AIST, Tsukuba 305-8563, Japan
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Ikegami Takeshi
National Metrology Institute of Japan/AIST, Tsukuba 305-8563, Japan
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Hartnett John
School of Physics, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia
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