ABSTRACT
A three-dimensional wave model for the stimulated Brillouin scattering can be built and analytically treated, in the case of slowly-varying-envelope approximation, in order to emphasize the transverse effects in SBS. The integration of the general SBS equation system can lead to more accurate analytical expressions for the pump and Stokes wave intensities and for SBS reflectivity. SBS can be modelled by a set of three differential equations describing the interaction between the light waves and the acoustical wave yielded in a nonlinear medium [5.1-5.10]. Due to the complexity of the nonlinear differential equations of the three-dimensional SBS model, several authors have solved them in different approximations or numerically, giving information about the evolution in space and time of the three interacting waves: pump wave, Stokes wave and acoustic wave.
