Mode coupling in a partially filled dielectric loaded plasma waveguide

Summary form only given. The stimulated Raman scattering of a perturbed TM mode in a dielectric loaded partially filled plasma waveguide is considered. The radiation is the result of the scattering of the pump electromagnetic wave, which is EH waveguide mode, off of a space-charge wave. In the analysis, a non linear wave equation for the three-wave interaction is used to investigate the coupling of the space-charge and the waveguide modes. Dispersion relations for electromagnetic modes are solved numerically to study the frequency characteristics of the interaction of the EH waveguide modes with the space-charge modes. Formulas for the spatial and temporal growth rates of the backscattered wave near the electron cyclotron frequency are derived and the effect of the dielectric liner on the growth rates is investigated. The numerical studies show that the presence of the dielectric liner has an effect on the phase matching condition and leads to a rather larger growth rates close to the electron cyclotron resonance.