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A compact caesium-atomic-beam microwave clock is investigated at Peking University. The atomic beam is prepared by magnetic state selection and detected, after microwave interrogation, by means of laser-induced fluorescence. Distributed feedback laser diodes are adopted for their large mode-hopping-free ranges, which ensure a care-free long-term operation. Besides, digital servo systems can automatically...
Noise sources in optical detection of a magnetic-state-selection cesium beam clock are analyzed in this paper. Atomic shot noise, photon shot noise, laser frequency noise and stray light noise are considered. Experimental measurements and estimations of the noise magnitude are made.
Bang-bang(BB) decoupling schemes for low-level atom systems in the cases of adiabatic decoherence alone, amplitude decoherence alone, and the case of adiabatic and amplitude decoherence together have been fully discussed. And for arbitrary-level atom system in amplitude decoherence, BB decoupling scheme was also given. Here after a review, we give the BB decoupling scheme for an arbitrary-level atom...
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