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2009•Unpublished venueRequires access

Synthesis chains based on ultra-stable cryogenic sapphire oscillator at NICT

Motohiro Kumagai, Hiroyuki Ito, Shigeo Nagano, Mizuhiko Hosokawa, Giorgio Santarelli, Clayton R. Locke, John Gideon Hartnett

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Abstract

A synthesis chain based on a cryogenic sapphire oscillator (CSO) has been developed at NICT. The 11.2005 GHz output of the CSO is down-converted to 1-GHz for laboratory distribution. The short-term frequency stability of the down-converter itself is better than 1 times 10-15at an averaging time of 1 second. The long-term drift of the CSO is suppressed by referencing it to a hydrogen maser linked to Japan Standard Time. For microwave interrogation to the cesium atom, a 9.192-GHz up-converter was developed.

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What this paper is about

A synthesis chain based on a cryogenic sapphire oscillator (CSO) has been developed at NICT. The 11.2005 GHz output of the CSO is down-converted to 1-GHz for laboratory distribution. The short-term frequency stability of the down-converter itself is better than 1 times 10-15at an averaging time of 1 second. The long-term drift of the CSO is suppressed by referencing it to a hydrogen maser linked to Japan Standard Time. For microwave interrogation to the cesium atom, a 9.192-GHz up-converter was developed.

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Available abstract

A synthesis chain based on a cryogenic sapphire oscillator (CSO) has been developed at NICT. The 11.2005 GHz output of the CSO is down-converted to 1-GHz for laboratory distribution. The short-term frequency stability of the down-converter itself is better than 1 times 10-15at an averaging time of 1 second. The long-term drift of the CSO is suppressed by referencing it to a hydrogen maser linked to Japan Standard Time. For microwave interrogation to the cesium atom, a 9.192-GHz up-converter was developed.

Key concepts: Sapphire, Hydrogen maser, Microwave, Maser, Frequency standard, Physics, Caesium, Electrical engineering

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