Stimulated rotational and vibrational Raman scattering by elliptical polarized pump radiation - art. no. 023812

Stimulated rotational and vibrational Raman scattering is investigated with a XeCl excimer laser by varying either the ellipticity degree of the pump radiation polarization and the pump beam quality factor (M-2) and divergenc e (theta). It is shown that the dependence of stimulated rotational Raman s cattering upon pump radiation polarization is substantially influenced by t he optical properties (M-2 and theta) of the pump beam. Gain suppression ef fects on stimulated vibrational Raman scattering and their dependence on pu mp beam optical properties have been evaluated to support experimental resu lts. Introducing the effective vibrational Raman gain provides a good under standing of the experimental results.