Interrogation oscillator noise rejection in the comparison ofatomic fountains

摘要

The frequency stability of an atomic fountain clock can be limitednby the phase noise of the interrogation oscillator via the “Dickneffect.” In this paper we demonstrate the rejection of the phasenfluctuations of the interrogation oscillator by the synchronization ofnatomic fountains. A reduction by a factor of 16 in the Allan standardndeviation of the relative frequency difference between two fountains hasnbeen obtained