Title :
Interrogation oscillator noise rejection in the comparison of atomic fountains
Author :
Bize, Sebastien ; Sortais, Yvan ; Lemonde, Pierre ; Zhang, Shougang ; Laurent, Philippe ; Santarelli, Giorgio ; Salomon, Christophe ; Clairon, Andre
Author_Institution :
BNM-LPTF, Obs. de Paris, France
Abstract :
The frequency stability of an atomic fountain clock can be limited by the phase noise of the interrogation oscillator via the "Dick effect." In this paper we demonstrate the rejection of the phase fluctuations of the interrogation oscillator by the synchronization of atomic fountains. A reduction by a factor of 16 in the Allan standard deviation of the relative frequency difference between two fountains has been obtained.
Keywords :
atomic clocks; frequency stability; frequency standards; phase noise; synchronization; Allan standard deviation; Dick effect; atomic fountain clock; frequency stability; interrogation oscillator; phase noise rejection; synchronization; 1f noise; Atomic clocks; Fluctuations; Frequency conversion; Frequency synchronization; Oscillators; Phase noise; Process control; Stability; Standards development;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
