Abstract

The production of multi-wavelengths by stimulated Raman scattering (SRS) in high pressure gases is receiving a great interest in recent years, being the SRS widely used in multiparametric LIDAR systems [1] In particular, the developing of new techniques to control the energy conversion efficiency from the pump radiation to a desired Stokes order represents one of the main research objective pursued in the last years II is well known that by utilising high pressure Raman gas and a low-angle pumping geometry to reduce the four wave mixing processes, a quite high conversion to the first Stokes (Sj) can be obtained. However, as the intensity of S] becomes sufficiently high, it stimulates the second order Stokes (S2) and so on higher order Stokes beams.

© 1996 IEEE