强激光在液晶材料中传输时易诱导非线性效应,这种非线性效应对液晶器件光学性能有一定影响.高斯光束通过平行排列的5CB液晶材料后产生自衍射图像,利用高速相机对不同光强的532 nm激光通过5CB液晶后的衍射图样成像.获得了从激光作用瞬间到液晶温度达到清亮点附近时衍射图样的变化过程.通过衍射图样对液晶材料光致折射率变化的性质进行了分析.利用基尔霍夫衍射积分公式数值模拟研究了相应强度532 nm高斯光束通过非线性液晶材料后在衍射屏上的衍射图样,并与实验结果进行了比对,定性分析了液晶非线性对液晶器件性能的影响.
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