Cryogenic sapphire microwave oscillators for space, metrology and scientific applications

Author

Giordano, V. ; Crop, S. ; Bourgeois, P.Y. ; Kersalé, Y. ; Rubiola, E. ; Mrad, M. ; Langham, C. ; Oxborrow, M. ; Schäfer, W.

Author_Institution

Inst. FEMTO-ST, Univ. de Franche Comte, Besançon, France

fYear

2011

fDate

13-20 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

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, ...

Keywords

cryogenic electronics; liquid helium; microwave oscillators; navigation; sapphire; Al₂O₃; VBLI antenna sites; base stations; cryogenic sapphire microwave oscillators; liquid helium facilities; metrology applications; pulse-tube cooler; remote sites; scientific applications; short term frequency stability; space applications; space navigation; ultra-stable reference; Cryogenics; Frequency synthesizers; Laser stability; Optical resonators; Oscillators; Resonant frequency; Thermal stability;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium, 2011 XXXth URSI

Conference_Location

Istanbul

Print_ISBN

978-1-4244-5117-3

Type

conf

DOI

10.1109/URSIGASS.2011.6050311

Filename

6050311