采用受激布里渊散射(SBS)现象的自泵浦相位共轭镜（PCM）特性在改善激光相位分布进而提高光斑能量集中度方面具有重大应用价值。基于后向SBS散射光的相位共轭特性, 数值模拟了不同畸变程度和不同取样孔径对SBS-PCM校正效果的影响, 并搭建SBS-PCM波前畸变补偿实验系统, 对不同影响因素的补偿效果进行验证。仿真及实验研究结果表明: 在弱畸变情况下光斑经系统补偿后相对强畸变情况分布更均匀规整, 光斑能量集中度更高; 在强畸变情况下大取样孔径显示出优势, 校正效果更佳。仿真和实验结果均表明, SBS-PCM有较强波前畸变校正能力。

The self-pumped phase conjugate mirror(PCM) feature using the stimulated Brillouin scattering(SBS) phenomenon has great application value in improving the laser phase distribution and the energy concentration of the spot. Based on the phase conjugation characteristics of back scattered SBS light, the influence of different degree of distortion and different sampling aperture on SBS-PCM correction was numerically simulated. The SBS-PCM wavefront distortion compensation system was established to verify the compensation effect of different influencing factors. The simulation and experimental results show that under the condition of weak distortion, the spot distortion is more uniform and regular than the strong distortion after compensation, and meanwhile spot energy concentration is higher. In the case of strong distortion, large sampling aperture shows the advantage of better correction. Simulation and experimental results show that SBS-PCM has strong wavefront distortion correction capability.