Abstract
A concise laser system for optically pumped cesium beam clocks is presented. The laser’s frequency is locked by a fluorescence signal, produced by the interaction between a cesium atomic beam and laser. A cesium oven with a longer atom source collimator, formed by an array of channels, was used to reduce the divergence angle of the cesium atomic beam. The size of the cesium source collimator is , and the cesium expenditure rate is per year. A dense cesium atomic flux was used to interact with the laser to generate a fluorescence signal when the oven heating temperature is not too high. The cesium beam tube could have a longer lifetime. The optical structure of the laser system is compact. The measured frequency stability of the laser is at 10,000 s when the laser frequency is locked in the transition of the cesium line. The design of an atom oven and atom source may be used in other atomic beam clocks to improve their performance.
© 2018 Optical Society of America
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10 September 2018: A correction was made to the funding section.
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