【摘要】 <正> 自从1970年Beaulieu首次报导TEACO₂激光器以来,这类激光器已成为激光核聚变、同位素分离、激光加工、激光雷达、激光化学等方面的有力工具。TEA CO₂激光的输出脉冲波形一般是由一个100毫微秒的增益开关脉冲及1～2微秒的尾部组成。我们用光子牵引检测器检测了紫外预电离TEACO₂激光器的脉冲波形,观察了各种泵浦水平下的各种波形,并采用Manes和Seguin的五温度动力学模型,分析计算了不同条件下的动力学过程,从而解释了实验结果。更多还原

【Abstract】 The output characteristics of a TEA CO2 laser for various gas mixtures and various pump levels are quantitatively calculated using time-varying electron excitation coefficients. The calculation results are in good agreement with those of experiments. According to the theory of partial population inversion suggested by Polanyi, the conditions for partial population of CO2 molecules are discussed. The single peak of the output pulse for gas mixtures involving N2 is explained with the partial population inversion.更多还原