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2008 J. Phys. B: At. Mol. Opt. Phys. 41 074014 (8pp) doi: 10.1088/0953-4075/41/7/074014
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Abstract. We demonstrate a population inversion in a three-level system via three-photon absorption from a single shaped ultrafast laser pulse. The optimal pulse shape for the inversion is discovered using closed-loop learning control and interpreted via pulse shape parameter scans and numerical integration of the Schrödinger equation. The population inversion is measured using a combination of spontaneous and stimulated emissions. Our results illustrate the importance of dynamic Stark shifts in coherent multi-photon excitation.
Print publication: Issue 7 (14 April 2008) |
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