Cryogenic Whispering Gallery Sapphire Oscillator for Microwave Frequency Standard Applications

K. Watabe, Y. Koga, S. Ohshima, T. Ikegami, John Hartnett

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A cryogenic Whispering Gallery sapphire resonator oscillator has been investigated using a 4 K pulse-tube cryocooler. The turnover temperature of the chosen mode in the sapphire crystal was 9.17 K with an unloaded Q-factor of 7 x 10(8). The prototype sapphire-loaded cavity oscillator was designed to oscillate at 9.195 GHz. A fractional frequency stability of 2 x 10(-13) was measured at integration times of 10s.
Original languageEnglish
Pages (from-to)1640-1642
JournalIEICE Transactions on Electronics
VolumeE87-C
Issue number9
Publication statusPublished - 2004

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