中文说明：应用背景利用快速傅里叶变换方法，仿真激光谐振腔模态，仿真包含激光晶体、不同腔镜结构的输出模态，可对谐振腔设计提供指导关键技术fft算法，考虑激光晶体增益，考虑泵浦方式，考虑泵浦光分布，考虑热透镜效应，考虑谐振腔结构，计算仿真输模态
English Description：
Application backgroundBy making use of the fast Fourier transform method, simulation of laser resonant cavity modes, including laser crystal, different cavity mirrors the structure of the output only modal simulation, provide guidance for the design of resonatorKey TechnologyFFT algorithm, consider laser crystal gain, consider pumping, considering the pump distribution, considering the effect of thermal lens, considering the resonant cavity structure, calculation and Simulation of transmission mode