光栅调谐TEA CO_2激光器理论计算模型  

Theoretical Mode on Calculating Grating Tuned TEA CO_2 Laser

作　　者：吴谨[1] 

机构地区：[1]中国科学院电子学研究所,北京100080

出　　处：《光学学报》2004年第4期472-476,共5页Acta Optica Sinica

摘　　要：基于六温度模型速率方程理论 ,建立了系统计算光栅调谐TEACO2 激光器动力学特性的理论模型。利用该模型举例计算了光栅调谐TEACO2 激光器的各种输出特性。计算中 ,激光器的增益体积为 0 .9L ,闪耀光栅的光栅常数为 12 0line/mm ,闪耀角为 30°,激光混合气体气压为 6 1 3kPa ,温度为 30 0K ,采用光栅零级作为耦合输出。计算给出了如下结果 :1)光栅分别调谐于 9R(2 0 ) ,9P(2 0 ) ,10R(2 0 )或 10P(2 0 )线时 ,激光器的输出脉冲能量 ;2 )光栅调谐于 10P(2 0 )线时 ,激光输出谱线的精细纵模结构和输出激光脉冲波形 ;3)激光输出脉冲能量和输出波长随光栅入射角的变化 ;4 )光栅输入失调时 ,激光输出波长的精细纵模结构。Based on the theory of six-temperature model rate equation a theoretical model on calculating the kinetic characteristics of a grating-tuned TEA CO 2 laser is given. As an illustration, the output characteristics of a grating-tuned TEA CO 2 laser is calculated out by this theory. In the calculation, a grating with a brazing angle 30° and 120 grooves per millimeter is used. The laser is assumed to be of an active volume 0.9 litter and total gas pressure 61.3 kPa under temperature 300 K. By numerical calculation, the following results are obtained: 1) the laser output pulse energy at each of the four vibration-rotational lines 9R(20), 9P(20), 10R(20), or 10P(20); 2) The fine longitudinal modes of the output wavelength and the output laser pulse profile at 10P(20) line; 3) The relationship between the output laser pulse energy/laser wavelength with the incident angle on the grating; 4) The relationship between the fine longitudinal modes of the output laser wavelength with the incident angle near 10P(20) line. The calculated results are in good agreement with the well-known experimental conclusion.

关 键 词：光栅调谐 激光物理 二氧化碳激光器 增益体积 六温度模型速率方程 精细纵模结构 

分 类 号：TN248.22[电子电信—物理电子学]