Principle of the Phase Controlling of the SBS Wave and its Application to the Beam Combination Laser for the Laser Fusion Driver

Abstract

The phase control of the stimulate Brillouin scattering (SBS) wave by a standing wave is the most important technique for the realization of the beam combination laser system. In this work, a theoretical model has been developed for explaining the principle of the phase controlling. The phase fluctuation of the SBS wave has been numerically calculated using this theoretical model. Consequently, it predicts the phase of the SBS wave will be stabilized as the fluctuation of the pump energy decreases and the pump energy increases. Furthermore, the change of the relative phase difference between the SBS waves can be easily calculated by this model in the beam combination laser system.