A cryogenic open-cavity sapphire reference oscillator with low spurious mode density.
IEEE Trans Ultrason Ferroelectr Freq Control
; 51(10): 1232-9, 2004 Oct.
Article
em En
| MEDLINE
| ID: mdl-15553506
ABSTRACT
In this paper, we describe the implementation of a microwave cryogenic sapphire oscillator (CSO) at the Laboratoire de Physique et Métrologie des Oscillateurs. In our realization we solved the problem of the spurious modes by operating the sapphire resonator in an open cavity. The CSO compared to a hydrogen maser demonstrates a frequency stability better than 3 x 10(-14) at short term. Its long-term frequency instability of the order of 3 x 10(-12)/day is limited by a random walk process. A first attempt to use this reference oscillator to characterize other signal sources is presented.
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MEDLINE
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article