Feasibility of suppression of steady-state and transient stimulated Brillouin scattering

The feasibility of suppression of stimulated Brillouin backscattering by phase modulation of the pump radiation and/or a longitudinal gradient of the Brillouin frequency shift is discussed. In both cases, the signal amplified by stimulated Brillouin scattering (STBS) in one part of the medium is out of resonance with the pump radiation in another part of the medium. A suitable theory of STBS is constructed for the transient regime when STBS is suppressed less efficiently.