STIMULATED RAMAN-SCATTERING OF AN HYBRID PUMP WAVE PROPAGATING OBLIQUELY IN A MAGNETOACTIVE CENTROSYMMETRIC SEMICONDUCTOR PLASMA

Considering the hydrodynamic model of a semiconductor plasma, stimulat ed Raman scattering (SRS) of an hybrid pump wave propagating obliquely with the externally applied magnetic field in a centrosymmetric doped semiconductor plasma has been analytically investigated. The origin o f SRS lies in the third-order nonlinear optical susceptibility arising due to the electron density perturbations and the molecular vibration s of the medium. The magnitude of third-order Raman susceptibility det ermined from the present analysis agrees well with the experimentally observed and theoretically quoted values. The steady-state Raman gain constant has been identified. The magnetic field is found to augment t he gain constant. The gain constant increases with scattering angle an d is maximum for the backscattered mode. Transmitted intensity of the scattered mode and Raman cell efficiency have also been deduced when t he cell length is quite large compared to the pump wavelength. The cel l efficiency is found to be maximum for the backscattered mode. The an alysis established the possibility of optical phase conjugation in sem iconductor plasma and the minimum cell length required for OPC to occu r is found to be 60 mu m.