Abstract
A previously implemented Cryogenic Sapphire Oscillator (CSO) based on a commercial cryocooler has been modified and its frequency stability and phase noise re-measured against a nominally similar liquid helium cooled CSO in the same laboratory. Assuming both contribute equally, their frequency stability and phase noise have been evaluated. We report for the oscillator a minimum Allan deviation of 3.9 × 10-16 at 20 s, a long-term frequency drift less than 1 × 10-14/day, and a measured single sideband phase noise of -97 dBc/Hz at 1 Hz offset from the carrier. The stated performance of the cryocooled CSO is adequate for it to be deployed at a local VLBI site for comparison against the hydrogen maser which is the current reference standard.
Original language | English |
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Title of host publication | 2010 IEEE International Frequency Control Symposium, FCS 2010 |
Pages | 670-673 |
Number of pages | 4 |
DOIs | |
Publication status | Published - 2010 |
Event | 2010 IEEE International Frequency Control Symposium, FCS 2010 - Newport Beach, CA, United States Duration: 1 Jun 2010 → 4 Jun 2010 |
Other
Other | 2010 IEEE International Frequency Control Symposium, FCS 2010 |
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Country/Territory | United States |
City | Newport Beach, CA |
Period | 1/06/10 → 4/06/10 |