Phonon excitation in Stimulated Brillouin Scattering

Stimulated Brillouin Scattering (SBS) is an example of traveling wave parametric interaction involving photons and phonons. When one of the interacting waves is a backward traveling wave, which yields spatial nonlinear distributed regeneration covering the entire medium, the system exhibits a typical backward traveling wave parametric interaction. It may oscillate with a distinct threshold. The generation of backward traveling light becomes known as optical phase conjugation. In this paper, both pulsed and continuous wave modes of phonon excitations for SBS are described.