Novel Design of an All-Cryogenic RF Pound Circuit

Ronni Basu, Rabi T. Wang, G. John Dick

Abstract:	We report on the design, construction and test of a new all-cryogenic RF Pound circuit used to stabilize a 100 MHz VCXO. Here, all active and passive RF components used to accomplish the phase modulation and detect a PM to AM conversion have been installed into the cryogenic environment. In conjunction with a high-Q cryogenic sapphire resonator a Pound discriminator sensitivity of 0.1 mV/Hz was seen experimentally. Based on this sensitivity and the noise properties of the pre-amplifier of the Pound signal, we calculate a limit of the oscillator’s Allan deviation as low as 4·10-16/vt. Experimentally, the first experiments gave a stability of 1·10-13 at 1 second.
Published in:	Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting August 29 - 31, 2005 Vancouver, Canada
Pages:	562 - 568
Cite this article:	Basu, Ronni, Wang, Rabi T., Dick, G. John, "Novel Design of an All-Cryogenic RF Pound Circuit," Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting, Vancouver, Canada, August 2005, pp. 562-568.
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