Autler-Townes spectroscopy of the 5S1/2-5P3/2-44D cascade of cold 85Rb atoms
B. K. Teo, D. Feldbaum, T. Cubel, J. R. Guest, P. R. Berman, G. Raithel
Abstract
We study nonlinear optical effects in the laser excitation of Rydberg states. 5S1/2 and 5P3/2 levels of 85Rb are strongly coupled by a strong laser field and probed by a weak laser tuned to the 5P3/2 - 44D Rydberg resonance. We observe high contrast Autler-Townes spectra which are dependent on the pump polarization, intensity and detuning. The observed behavior agrees with calculations, which include the effect of optical pumping.
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