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Hyperfine optical pumping of cesium with a CW GaAs laser

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1 Author(s)
Picque, J.-L. ; Laboratoire Aimé Cotton, Centre National de la Recherche Scientifique, Orsay, France

Efficient and stable hyperfine pumping of Cs133vapor has been achieved for extended periods of time with the use of a CW single-mode GaAs diode laser. Static matching of either hyperfine component of the 8521-Å D2line was performed by adjusting the dc injection current. As the pumping-beam intensity was increased continuously, the population of the depleted hyperfine level was monitored by the fluorescence caused by a weak, modulated probing beam. For the first time, it has been possible to display a complete depopulation of either one of the two ground-state hyperfine levels. These results provide new possibilities for cesium frequency standards, such as atomic-beam clocks without deflecting magnets. The construction of a cesium maser now becomes feasible.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:10 ,  Issue: 12 )

Date of Publication:

Dec 1974

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