Improved cryogenic sapphire oscillator with exceptionally high frequency stability

S. Chang, Anthony Mann, Andre Luiten

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)


Extremely high short term frequency stability has been realised in oscillators based on liquid helium cooled sapphire resonators with a modified mounting structure. These oscillators have exhibited a fractional frequency stability (Allan deviation) of similar to 5.4 x 10(-16)tau(1/2) for integration times (a of 1-4s and a minimum Allan frequency deviation of 2.4 x 10(16) at 32s. For integration times greater than 100s the oscillator frequency stability degrades approximately as 3 x 10(-17)tau(1/2) This is the best stability reported to date for any frequency standard over integration times of 1-100s.
Original languageEnglish
Pages (from-to)480-481
JournalElectronics Letters
Issue number5
Publication statusPublished - 2000


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