Time behavior of stimulated Raman scattering

The time relationship between the 1st Stokes, 2nd Stokes, 3rd Stokes, 1st anti-Stokes radiations, and the exciting laser radiation for stimulated Raman scattering in self-focusing liquids has been investigated theoretically and experimentally. A model is presented for calculating the output power and time behavior of the different orders of Stokes radiation when self-focusing occurs. Experimentally, good agreement is found between predicted and measured output powers, but some apparent anomalies are observed in the time behavior for the 2nd and 3rd Stokes radiations and 1st anti-Stokes radiation, especially in carbon disulfide. There are strong indications of dielectric breakdown occurring in the liquids, and it is shown qualitatively that the observed time behavior of the higher order Stokes radiation can be caused by the dielectric breakdown.