引言随着激光化学和激光分离同位素研究工作的开展,迫切需要一种譜綫稳定、寿命长、輸出能量較大的TEA CO_2激光器。为此,我們研制了一台CP—Ⅱ型选频双放电TEA CO_2激光器。經过一年多科研工作的考驗,証明性能良好。TEA CO_2激光器的关键是怎样达到大面积均勻輝光放电,为此有各种子电离技术,該器件采用由三个电极組成的双放电結构。这种子电离方式早为Pan和Bishop等人所采用,效果良好。近年来,国内兄弟单位也用过这种子电离方式,取得了一些經驗,在他們工作的基础上,我們对电极結构,电路参数等做了一些改进,改善了放电性能,光腔結构上考 INTRODUCTION With the development of laser chemical and laser separation isotopes, there is an urgent need for a TEA CO_2 laser with stable spectral line, long lifetime and large output energy. To this end, we have developed a CP-Ⅱ frequency selective discharge TEA CO_2 laser. After more than a year of scientific research, it proved that the performance is good. The key to TEA CO_2 lasers is how to achieve a large area of ​​uniform glow discharge. There are various sub-ionization technologies for this purpose. The device uses a double-discharge structure consisting of three electrodes. This sub-ionization method as early as Pan and Bishop and others used, the effect is good. In recent years, the domestic units also used this sub-ionization methods, and gained some experience, on the basis of their work, we made some improvements to the electrode structure, circuit parameters, etc., to improve the discharge performance, the optical cavity structure of the test