自散焦介质中的光束聚焦是通过交叉相位调制效应,强抽运光束诱导弱光束聚焦.自Agrawal发现这一现象以来,许多学者做了广泛的研究.通过推导1+1维自散焦介质中斜入射光束的传输方程,并应用数值计算斜入射角度对弱光束聚焦的影响,得到了入射角度的最佳值(σ=0时,光束最大压缩2.23倍;σ＝4.07光束最大压缩2.62倍).此结果是对自散焦介质中的光束聚焦理论的补充,对利用此现象进行光束压缩实验的实验设计有一定的参考价值.
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