The results show the advantages by compared with the traditional methods.Then the method is also exploited to analyze the confocal unstable resonator without and with media inside.

• 首先,通过对圆形镜共焦腔模式进行了分析,验证了方法的精度和适用性,同时,显示了该方法与传统方法相比的几个主要优点。