Abstract: The tests and experiments of the various parameters, which affect the output power of the long cavity HCN laser, are performed. It is shown that there exists a group of optimized parameters, under which the output power of the long cavity HCN laser reaches 210mW, these parameters are: grid 250 meshes, waveguide wall temperature 130°C, mixed gas flow 21.3sccm, laser current 1.3A, working gas pressure 147Pa, the added He flow 12sccm.

Key words: Long cavity, FIR, Laser power, Best parameters

摘要： 对影响长腔HCN激光器功率输出的各种参数进行了调试实验，实验结果表明，激光器的最佳参数为：栅网250目/英寸、工作波导管壁温130°C、混合气体流量21.3sccm、激光工作电流1.3A、工作气体压力147Pa、补充He气流量12sccm。在最佳工作参数条件下，长腔HCN激光器的激光输出为210mW。

关键词: 长腔, FIR, 功率, 最佳参数