采用一维瞬态模型对受激布里渊散射(SBS)过程进行了数值模拟,研究了介质参数对SBS特性的影响规律;选取FC-72、FC-75、CCl₄、CS₂、丙酮、苯以及CCl₄/乙醇的混合溶液等作为散射介质,在Nd∶YAG调Q激光系统下进行了实验研究,比较了各种介质所产生的SBS脉宽、能量反射率和波形之间的差异,由此讨论了介质参数对SBS特性的影响.结果表明,介质增益系数越大,吸收系数越小,SBS能量反射率就越大;吸收系数越大,产生的SBS脉宽就越窄;声子寿命越短,SBS波形前沿就越陡,并且越容易出现调制现象.

SBS process was simulated numerically based on a one-dimensional transient model. The influence of Brillouin media on SBS characteristics was studied. A variety of media, such as FC-72, FC-75, CCl₄, CS₂, Acetone, Benzene, and mixture liquid of CCl₄/Ethanol, are investigated experimentally with a Nd∶YAG Q-switched laser, and comparison is made between the SBS characteristics, such as the SBS pulse-width, the energy reflectivity and the SBS pulse shape. It is shown that a large gain factor corresponds to a small absorption coefficient and a large SBS energy reflectivity; a large absorption coefficient corresponds to a short SBS pulse-width; and a short phonon lifetime corresponds to a short SBS rise time. The modulation of SBS pulse shape tends to occur with a short phonon lifetime.