利用耦合波方程分析了相位共轭效应和受激散射阈值效应对受激散射光发散角的影响.在甲醇、乙醇和丙酮的受激布里渊散射实验中,分别获得受激布里渊散射光发散角减小3.2、3.0和2.4倍,脉宽压缩4.3、4.3和2.6倍,并获得散射光束发散角随泵浦能量的变化关系.

The influence of the phase conjugation effect and the threshold effect of stimulated scattering on the divergence of stimulated scattering was discussed. Compared with the pumping beam, the divergence angles of stimulated Brillouin scattering (SBS) in methanol, ethanol and acetone were reduced to a factor of 3.2, 3.0 and 2.4 while the pulse durations were compressed to 4.3, 4.3 and 2.6. The relation between the divergence angle of the stimulated Brillouin scattering and the pumping energy was obtained.