Study of beam combination by stimulated Brillouin scattering

In this paper, a new method of laser beam combination by SBS is proposed. In this method, the pump pulse cluster, which consists of series pulses that is distributed by various time, is incident at one side while the Stokes seed is incident at the other side of the SBS cell, The Stokes seed beam extracts energy from the input pulse cluster in the interaction region of the SBS cell. Energy reflectivity and pulse width of the Stokes seed are calculated on condition of various pulse cluster, seed and medium. The results show that highly effective beam combination is obtained by back injecting Stokes seed into amplified SBS cell and the extracting energy from the pulse cluster of the pump.