根据光在格兰泰勒棱镜和格兰傅科棱镜空气隙胶合层中的干涉效应,分析了空气隙偏光棱镜对单模高斯光束光强分布的影响;结果表明：对于某一波长的入射光,当空气隙的厚度一定时,透射光强随光在空气隙介面上入射角的变化作周期性振荡;当入射角一定时,透射光强随空气隙厚度的变化作周期性变化;且透射高斯光束的形状也随光的入射角以及空气隙厚度的改变发生变化;且无论是透射光强的周期性振荡,还是透射高斯光束的形状的变化,格兰泰勒棱镜的影响均小于格兰傅科棱镜;这说明前者的综合性能优于后者。

Based on interference effect at the airgap cementing layer of GlanTaylor prism and GlanFoucault prism, the effect of airgap polarizing prism on the transmitted light intensity distribution of single-mode Gaussian beam is analyzed. The result shows that, for certain wavelength and airgap thickness, the transmitted light intensity oscillates periodically with the change of incident angle, and for a certain incident angle, the transmitted light intensity oscillates periodically with the change of airgap thickness. The profile of transmitted Gaussian beam varies with the change of incident angle and airgap thickness. Considering the effect on light intensity and beam profile, GlanTaylor prism is more robust than GlanFoucault prism, indicating that the former has better general performance than the latter.