| Physics Seminar : Latest advances in Cryogenic Sapphire Oscillators |
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A low maintenance long-term operational Cryogenic Sapphire Oscillator has been implemented at 11.2 GHz using an ultra-low-vibration cryostat and pulse-tube cryocooler. The performance of the oscillator is explained in terms of temperature and frequency stability. The phase noise and the frequency stability have been evaluated by comparing it to an ultra-stable liquid helium cooled CSO in the same laboratory. The square root Allan variance was measured as 1.4 x 10-15 /t ^-1/2 for integration times 1 < t < 20 s with a minimum value of 5.3 x 10-16 for the two oscillators at t = 20 s. The oscillator single side band phase noise was measured to be approx -97.5 dBc/Hz at 1 Hz offset from the carrier. This is the world's most stable microwave oscillator employing a cryocooler.
| Speaker(s) |
Prof. John Hartnett (School of Physics, UWA)
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| Location |
Room 2:15, Physics UWA
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| Contact |
Gay Hollister
<[email protected]>
: 6488 2738
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| Start |
Tue, 30 Mar 2010 15:30
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| End |
Tue, 30 Mar 2010 16:30
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| Submitted by |
Gay Hollister <[email protected]>
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| Last Updated |
Wed, 24 Mar 2010 08:56
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