Hyperfine optical pumping of cesium with a CW GaAs laser
Abstract
Efficient and stable hyperfine pumping of Cs-133 vapor 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-A D2 line 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.
- Publication:
-
IEEE Journal of Quantum Electronics
- Pub Date:
- December 1974
- DOI:
- 10.1109/JQE.1974.1068116
- Bibcode:
- 1974IJQE...10..892P
- Keywords:
-
- Cesium Vapor;
- Gallium Arsenide Lasers;
- Hyperfine Structure;
- Laser Outputs;
- Optical Pumping;
- Atomic Clocks;
- Cesium 133;
- Continuous Wave Lasers;
- Frequency Standards;
- Ground State;
- Line Spectra;
- Masers;
- Lasers and Masers