Beam combining using Orientational Stimulated Scattering in Liquid   Crystals
  Possibility of beam combining and clean-up using Orientational Stimulated Scattering in a Nematic Liquid Crystal is considered. We numerically study the dynamics of the process and find that back-conversion process tends to limit the effective interaction strength. Instability of the steady state of cross-phase modulation is demonstrated, when both waves have the same frequency. We show that high conversion efficiency can be achieved, and that the shape and wave-front of the amplified output signal are robust with respect to amplitude and phase distortions of the input pump. 
Hakob Sarkissian, Chang Ching Tsai, Boris Zeldovich, Nelson Tabirian