高斯平面波场狭缝菲涅耳衍射的一些特性

Some Features of Fresnel Diffraction Fields of Gaussian plane Waves Truncated by Slit

用计算机数值求解了高斯平面波场的狭缝菲涅耳衍射图样。以均匀平面波的衍射图样为参照，求出了不同光斑尺寸、横向偏移高斯光场衍射图样与参照图样之间的相关系数。对几种参数下的高斯光束衍射图样提取了重心坐标，研究了衍射图样的重心在空间的轨迹形状及拟合方程。

Fresnel diffraction intensity patterns are computed where Gaussian plane waves with various spot size and transverse displacement are truncated by a slit.The correlation coefficients of these pattern curves and that one of uniformly planar waves are calculated.The gravity center coordinates of these patterns and the fit formula of space loci of the gravity centers are investigated.