Study on the control of optical limiting of pulse-shape in stimulated Brillouin scattering process
受激布里渊散射光限幅输出波形控制研究

Based on the numerical models of stimulated Brillouin scattering(SBS) limiting, the influence of seed pulse duration, induced time and seed power on transmitted pulse shape in SBS optical limiting process is theoretically investigated. By seeding a Stokes pulse into the SBS optical limiting system, the SBS induced by this seeded Stokes pulse can reshape the transmitted limited pulse profile. By choosing suitable physical parameters, the best limited temporal profile can be obtained. The theoretical simulation shows that limited pulse shape can be controlled. When seed pulse duration is chosen as five times the length of the pump pulse duration and the delay time is just the same as the pump pulse duration, the limited pulse shape levels off, and the higher the seed power is, the lower the limited power steps. Optical limiting of pulse-shape can be controlled by introducing a seed to a stimulated Brillouin scattering cell.