Abstract

In this paper we report a new wave propagation theory and its experimental verification for stimulated Raman scattering with a tightly focussed Gaussian pump beam. We have found that our previously obtained exact solution for homogeneous (exponential) wave growth in media with focussed Gaussian gain⁽¹⁾ may be extended to include coupling and growth of anti-Stokes and Stokes modes to the prescribed pump wave. The new work fully incorporates the interplay between diffraction, parametric processes and homogeneous growth, and also has a formally exact (and numerically rapid) solution. The intensity-dependent dispersion associated with the Raman gain resonance is incorporated and is essential to the proper description of the process.

© 1984 Optical Society of America