高斯光束经圆孔光阑衍射后在近场区的轴向光场分布

Near field on-axis irradiance of truncated-Gaussian apertures

本文从衍射积分方程出发,得到了高斯光束经圆孔光阑衍射后在近场区,也就是在光阑平面和菲涅耳区之间的轴向光场分布。此外,还得到了其菲涅耳衍射特性的一些新结果。作为比较,文中也对平面波和球面波的入射进行了分析。

Using the diffraction, integral equation, the irradiance in near -field , i. e., in the region between the aperture and the Fresnel region, of plane-wave Gaussian beams are presented for the first time. Some new results for Fresnel diffraction characteristics of Gaussian beams are obtained. For comparison, the incidences of plane and spherical wave are also analyzed.