Wollaston棱镜对单模高斯光束光强分布影响的分析

Effects of Wollaston prism to the distribution of light intensity of single-mode Gaussian beam

为了研究Wollaston棱镜对单模高斯光束光强分布的影响,采用分析光在棱镜胶合层中干涉效应的方法,对透射o光和e光分别进行了分析。对于某一给定的两偏振模兼并的单模高斯光束,透射o光和e光均随入射光在胶合层介质面上入射角、胶合层的厚度及层中介质的折射率的变化作周期性振荡,且振荡的幅度和频率也随之变化,这种振荡对透射光束的影响小于0.65%。结果表明,在实际应用中,只要对透射光束光强相对变化的要求不小于0.65%,即可忽略Wollaston对高斯光束光强分布的影响。

In order to study the effect of Wollaston prism on the intensity of single-mode Gaussian beam,the transmitting o light and e light were studied respectively by analyzing interference in the prism cementing layer. For a given single-mode Gaussian beam merged with two polarizing modes, the transmission polarizing light intensity of o and e oscillates in period with the incident light angle at the interface of the cementing layer, the thickness of the cementing layer, and the refracting index of the transmitter in the cementing layer, and that the amplitude and frequency of the oscillation change with them too. But in general, the effect on the transmitted Gaussian beam is less than 0.65 %. In practice,if the relative intensity is required larger than 0.65%, the effect of Wollaston prism on the transmitting characteristics of Gaussian beam can be neglected.