本文以四面镜8字形稳定环形腔为代表,利用传输矩阵法、等效厚透镜法和腰斑处为参考面展开等三种方法,对环形腔内光束的传输特性作了详细的计算和分析,并与驻波腔的结果进行了比较。对象散的影响亦作了讨论。

The beam propagation characteristics in the 8-shaped ring resonator containing four mirrors are calculated and comparied with the standing wave resonator by using-three methods: (1) propagation matrix representation; (2) equivalent sequence of thick lenses, and (3) waist position being selected as the reference developing plane. The influence of astigmatism is also discussed.