Frequency stability of an optically pumped cesium beam frequency standard |
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Authors: | V Candelier V Giordano A Hamel G Théobald P Cérez C Audoin |
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Institution: | (1) Laboratoire de l'Horloge Atomique, Unité Propre de Recherche du CNRS associée à l'Université Paris-Sud, Bât. 221, Université Paris-Sud, F-91405 Orsay Cedex, France;(2) Present address: CEPE-44 avenue de la Glacière, F-95100 Argenteuil, France |
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Abstract: | Results obtained in an experimental optically pumped cesium beam frequency standard in which a single semiconductor laser is used for the state selection and the atom detection are reported. The separation between the two interaction regions is equal to 21 cm. This gives a 500 Hz linewidth which is observed with a signal to noise ratio equal to 10,000 in a 1 Hz noise bandwidth. A quartz crystal oscillator is frequency controlled by the atomic transition. The measured short term frequency stability is given by y( )=2×10–12 –1/2 for 1 s<![tau](/content/n68kn4250p717144/xxlarge964.gif) 500 s. Prospects for improvement of this frequency stability are discussed. |
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Keywords: | 32 80B 35 10F 35 80 |
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