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Optica Publishing Group
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1994),
  • paper QTuL6

Two-photon spectroscopy of the 6S1/2 → 6D5/2 transition of atomic cesium

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Abstract

The use of cold atoms confined in a magneto-optic trap (MOT) is a powerful avenue for high resolution spectroscopy.1,2 The nearly Doppler-free environment of the MOT as well as the high sample density makes this technique particularly attractive. in our experiment we have studied the hyperfine structure of the 6D5/2 level of atomic cesium. The transition 6S1/2 → 6D5/2 is excited via two-photon absorption at 884 nm and the population of the 6D5/2 state is monitored via the fluorescence from the 6D5/2 → 6P3/2 transition at 917 nm (Fig. 1). From excitation spectra, we extract the magnetic dipole (a) and electric quatrupole (b) coefficients for the 6D5/2 state with an accuracy approximately 25 times better than those in ref. 3. We also observe Stark shifts and power broadening of the 6D5/2 hyperfine components due to the presence of the trapping beams, demonstrating that accurate measurements of these effects are well within the capabilities of our technique.

© 1994 Optical Society of America

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