设计并研制了以全金属射频波导CO2激光器为抽运源的太赫兹(THz)激光器,其中THz激光工作气体为CH3OH气体,在波长为9.69 μm的P9(36)支CO2脉冲激光抽运情况下,获得了脉冲THz激光输出。实验上测量了脉冲抽运光及THz激光波形及重复频率,抽运光由宽带室温HgCdTe探测器测试,最高重复频率为5 kHz。THz激光由热释电探测器接收,由于受探测器限制,实验上测量的THz激光波形失真,最高重复频率为1 kHz。另外研究了输出THz激光强度与工作气压的关系,测出此系统最佳工作气压为10 Pa左右。研制的THz激光器为全金属结构,不用水冷,具有结构简单、体积小的优点,可以为相关研究提供参考。

The terahertz (THz) laser pumped by all-metal radio frequency (RF) waveguide CO2 laser is designed and researched.Its working gas is CH3OH .The pulsed THz laser output is obtained with the pump of P9(36) CO2 pulsed laser(9.69 μm).The THz laser waveform and pulse repetition frequency (PRF) for the pumped laser and THz laser are measured in experiment.The relationship between laser intensity and working gas pressure is also given.The PRF can be up to 5 kHz for the pumped laser detected by HgCdTe detector with high bandwidth.The THz laser is measured by pyroelectric detector and the measured waveform is distorted and the maximum PRF is only 1 kHz due to the limitation of the detector.The relationship between THz laser intensity and working gas pressure is also studied and the best working pressure is about 10 Pa.The designed THz laser has all-metal structure,which needs no water cooling.It has the advantages of simple structure and small size,which are helpful for further researches.