Enhanced backward stimulated Raman scattering by coupling between the forward and backward processes

Abstract

Abstract A new scheme of backward Raman scattering, in which coupling between the forward and backward Stokes processes is caused by injecting an additional backward pump field, is demonstrated both experimentally and theoretically. Four wave mixing among the pump and Stokes fields leads to gain enhancement of backward Raman scattering. A factor of gain enhancement of 2 was obtained with injection of a 0.4 mJ seed Stokes and a 5 mJ backward pump wave.