1.前言众所周知,反射镜的特性对激光器的性能有很大的影响。特别是广泛应用的氦氖系统(激光器),由于在可见光范围内其增益小,所以输出多受到反射镜损失的限制。激光器的内部损失有衍射损失,布鲁斯特窗的透过损失。衍射损失由共振器及放电管的几何尺寸决定。至于布鲁斯特窗的问题归根结蒂 1. Introduction As we all know, the characteristics of the mirror have a great impact on the performance of the laser. In particular, the widely used He-Ne system (laser) is limited by the loss of the mirror due to its small gain in the visible range. The loss of diffraction inside the laser is lost and the loss of Brewster window is lost. The diffraction loss is determined by the geometry of the resonator and discharge tube. As for the question of Brewster window in the final analysis