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Cryogenic sapphire microwave oscillators for space, metrology and scientific applications

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9 Author(s)
Giordano, V. ; Inst. FEMTO-ST, Univ. de Franche Comte, Besançon, France ; Crop, S. ; Bourgeois, P.Y. ; Kersale, Y.
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We recently demonstrated a Cryogenic Sapphire Oscillator (CSO) presenting a short term frequency stability better than 3 × 10-15 for 1 s≤ τ <; 1000 s and achieving 4.5 × 10-15 for one day integration. This CSO incorporates a pulse-tube cooler instead of a bath cryostat-thus eliminating the need for regular supplies and manual transferring of liquid helium. The advent of reliable and cryocooled CSO open the possibility to implement such an ultra-stable reference not only in metrological laboratories with liquid helium facilities but also in remote sites like base stations for space navigation, VBLI antenna sites, ...

Published in:

General Assembly and Scientific Symposium, 2011 XXXth URSI

Date of Conference:

13-20 Aug. 2011