通过建立拉曼-纳斯衍射模型,运用数值模拟法,获得了拉曼-纳斯声光衍射的各级光强分布规律。表明调制因子对拉曼-纳斯衍射现象的产生有重大作用,且随着调制因子的增加,各衍射级的光强相对系数变化明显,且各级衍射光强变得匀滑。同时进行了相应的实验测试,实验结果与理论分析一致。
The light intensity distribution of Raman-Nath diffraction at all levels is obtained by establishing Ra- man-Nath-diffraction model and using numerical simulation method. The simulation results indicates that the modu- lation factor v has an important effect on Raman-Nath diffraction phenomenon, and the relative coefficient of light intensity at all levels is clearly changed and become smoothing with the increase of modulation factor. Simultaneous- ly the corresponding experiment is carried out, and the experimental results are consistent with theoretical analysis.