实验上分析了在多模激光抽运的条件下，水中宽带受激布里渊散射（WSBS）及前向受激拉曼散射（FSRS）产生的物理机制及二者之间能量变化的关系。实验结果表明，在多模激光抽运过程中，WSBS能量与FSRS能量处于不断变化的状态。聚焦长度较短或抽运光能量相对较低时，WSBS在散射过程中占据主导地位；随着聚焦长度和抽运光能量的增加以及光学击穿的产生，FSRS在散射过程中逐渐占据优势。

Wideband stimulated Brillouin scattering (WSBS) and forward stimulated Raman scattering (FSRS) in water pumped by a multi-longitudinal-mode laser are studied. The experimental results indicate that in the pump process of multi-longitudinal-mode laser, energy changes exist between WSBS and FSRS. WSBS will be dominant when the focal length is shorter or the pump energy is lower; on the contrary, FSRS will be dominant with the increase of focal length and pump energy or the appearance of optical breakdown.