Numerical research on phase-conjugated stimulated Brillouin scattering mirror using fused-silica glass without laser-induced damage

Based on the nonlinear optics coupled wave equations, a physics model of SBS under focal pumping condition was established and numerical codes were developed. The laser field in fused silica glass when SBS existed was thoroughly evaluated and the damage mechanism was exploited. It is found that the optical-limiting-effect makes the laser intensity decrease in the focus spot to a moderate level. The dependence of SBS process on the laser pulse width and focal length of coupling lens was discussed and an operation state with high efficiency and without laser-induce damage was suggested.