高斯光束斜入射法布里-珀罗干涉腔后的反射光强分布

基于多光束干涉原理,推导了高斯光束斜入射法布里-珀罗干涉仪后的反射光强表达式.在此基础之上数值研究了入射角对高斯光束的反射特性的影响.研究结果表明:当法布里-珀罗干涉腔的腔长满足反共振时,随着入射角的增大,反射光的光强分散,峰值强度下降后呈现出幅度衰减的波动;峰值位置随着入射角的增大,呈现出幅度越来越小的振荡偏移;光斑大小随入射角的增大,呈现出幅度减小的振荡.

Reflecting Characteristics of Gaussian Beam Incidenting Nonnormally on a Fabry-Pérot Interferometer

Based on multi-beam interference principle and transmitting equation of a Gaussian beam in free space, the intensity expression of reflected beam for a Gaussian beam incidenting nonnormally on a Fabry-pérot interferometer ( FPI ) has been derived. According to that, the influence of the incidence angle on the reflection of a Gaussian beam has been investigated theoretically. The results show the intensity of the reflection beam disperse and the peak intensity decrease with the increase incidence angle under the condition that the cavity length of FPI is anti-resonance for the beam, then the peak intensity oscillates with an attenuating amplitude. The position of the peak intensity and the size of the beam vibrates with the increase of the incidence angle, and their vibrating amplitude is damping.