厄米-高斯光束的焦开关

Focal switch of Hermite-Gaussian beams

考虑了由光阑和透镜组成的简单光学系统 .研究表明 ,当厄米 高斯光束入射这一系统 ,在系统和光束参数满足一定条件时会出现称为焦开关的新现象 .详细的数值计算和物理分析说明了厄米 高斯光束的焦开关特性 .与已有的工作做了比较 ,并指出了焦开关可能的应用 .

A simple optical system consisting of an aperture and a thin lens is considered. lt is shown that when a Hermite-Gaussian (H-G) beam is incident on such a type of system and the parameters of the optical system and the beam satisfy a certain condition, a new effect called the focal switch can take place. Detailed numerical results and physical explanation are given to illustrate the characteristics of the focal switch of H-G beams. A comparison with the previous work is made and the potential application of the focal switch is pointed out.