title: Level-splitting effects in resonant four-wave mixing.
abstract: Resonant spectral structures of four-wave mixing (FWM) in molecular sodium are investigated. For a double- ? configuration with strong-weak-strong-weak fields, split components in FWM spectra induced by the strong pump fields are observed. It is shown that the split components merge into a single peak for a certain ratio of the strong field intensities. A correlation between the level-splitting effects and the saturation behavior of the FWM signal is experimentally demonstrated.
authors.forename: S A
authors.initials: SA
authors.lastname: Babin
authors.forename: S I
authors.initials: SI
authors.lastname: Kablukov
authors.forename: U
authors.initials: U
authors.lastname: Hinze
authors.forename: E
authors.initials: E
authors.lastname: Tiemann
authors.forename: B
authors.initials: B
authors.lastname: Wellegehausen