运用激光腔的矩阵理论，给出了内含热透镜的平－ 平腔的 Ｇ 参数，并给出了热稳条件，进而以高输出功率及稳定的输出光束参数为目的对谐振腔进行了优化设计，并用设计的参数进行了实验。 By using the laser cavity matrix theory, the G parameters of the flat-cavity with thermal lens are given, and the thermal stability conditions are given. The resonant cavity is optimized with high output power and stable output beam parameters Design, and experiments with the design parameters.