为了研究泵浦脉冲宽度对受激布里渊散射(SBS)相位共轭保真度的影响，分别采用CCl₄、Nhexane、CS₂三种不同的SBS介质，在泵浦脉宽分别为12ns、7ns和2ns的情况下，采用列阵相机法对保真度进行实验研究。结果表明：泵浦脉宽对SBS相位共轭保真度有很大影响。当泵浦脉宽远大于介质声子寿命时，保真度保持较高数值，且比较稳定；当泵浦脉宽逐渐接近并近似等于声子寿命时，保真度的值开始逐渐降低，降低的幅度也逐渐增大，稳定性也开始变差；当泵浦脉宽减小到小于声子寿命时，保真度大幅度降低，波动性增大，相位共轭情况很差。

In order to research the influence of pulse-width on stimulated Brillouin scattering(SBS)phase conjugation fidelity,experiments were performed on three different SBS media CCl₄,N-hexane and CS₂. The method of array camera is used under the conditions that pulse-width is respectively 12 ns,7 ns,2 us. Experimental results show that pulse-width has a great influence on SBS fidelity. The fidelity value of SBS has higher standard,and more stability when pulse-width is a greatly larger than phonon lifetime;It gradually falls down when pulse-width equals to phonon lifetime;It declines rapidly and has strong fluctuation when pulse-width is less than phonon lifetime.