Observation of Raman Self-Conversion of fs-Pulse Frequency due to Impulsive Excitation of Molecular Vibrations

@inproceedings{Korn1998ObservationOR,
  title={Observation of Raman Self-Conversion of fs-Pulse Frequency due to Impulsive Excitation of Molecular Vibrations},
  author={Georg Korn and Oliver D{\"u}hr and A. V. Nazarkin},
  year={1998}
}
We report on the observation of a Raman frequency conversion mechanism different from the usual Stokes (anti-Stokes) stimulated process. A continuous down-shift of a laser pulse frequency was measured for sufficiently short (≤ 40 fs) pulses propagating in a gaseous SF6. We attribute this behavior to the extremely nonstationary nuclear response of SF6-molecules to the light field with a duration shorter than the period of the Raman-active vibration.