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利用变换矩阵和ＡＢＣＤ定律讨论了激光谐振腔对高斯光束的变换，推导出了高斯光束参数（光斑尺寸、波面曲率半径）通过光腔输出镜的变换公式．并对热透镜腔、光束远场发散角等问题进行了讨论
The transformation of Gaussian beam by laser resonator is discussed by using transformation matrix and ABCD law. The transformation formula of Gaussian beam parameters (spot size and wave radius) through the optical cavity output mirror is deduced. The problems of the thermal lens cavity and the far-field divergence angle of the beam are also discussed