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基于快速傅里叶变换，提出了等效空间频谱传输法并计算了一维变反射率镜（１ＤＶＲＭ）非轴对称虚共焦腔板条激光器的谐振模，与均匀反射率镜（ＵＲＭ）和二维旋转对称变反射率镜（２ＤＶＲＭ）非轴对称虚共焦腔作了比较。在计算中考虑了腔的非轴对称性和激活介质的增益饱和特性。数值计算结果表明，一维变反射率镜非轴对称虚共焦腔具有高提取效率和高光束质量的优点
Based on the Fast Fourier Transform, an equivalent spatial spectrum transmission method is proposed and the resonant modes of one-dimensional variable reflectance mirror (1DVRM) non-axisymmetric imaginary-avalanche slab lasers are calculated, which are compared with the uniform reflectance mirror (URM) and Two-dimensional rotational symmetry variable reflectivity mirror (2DVRM) non-axisymmetric imaginary confocal cavity for comparison. The non-axial symmetry of the cavity and the gain saturation of the active medium are considered in the calculation. The numerical results show that the one-dimensional variable reflectivity mirror has the advantages of high extraction efficiency and high beam quality