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Wavelength dependent ac-Stark shift of the 1S0 - 3P1 transition at 657 nm in Ca

Carsten Degenhardt·Hardo Stoehr·Uwe Sterr·Fritz Riehle·Christian Lisdat
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Abstract

We have measured the ac-Stark shift of the 4s2 1S0 - 4s4p 3P1 line in 40Ca for perturbing laser wavelengths between 780 nm and 1064 nm with a time domain Ramsey-Borde atom interferometer. We found a zero crossing of the shift for the mS = 0 - mP = 0 transition and σpolarized perturbation at 800.8(22) nm. The data was analyzed by a model deriving the energy shift from known transition wavelengths and strengths. To fit our data, we adjusted the Einstein A coefficients of the 4s3d 3D - 4s4p 3P and 4s5s 3S - 4s4p 3P fine structure multiplets. With these we can predict vanishing ac-Stark shifts for the 1S0 m = 0 - 3P1 m = 1 transition and σ- light at 983(12) nm and at 735.5(20) nm for the transition to the 3P0 level.

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Carsten Degenhardt, Hardo Stoehr, Uwe Sterr, Fritz Riehle, Christian Lisdat. 2004-06-04. Wavelength dependent ac-Stark shift of the 1S0 - 3P1 transition at 657 nm in Ca. https://doi.org/10.1103/physreva.70.023414

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