射频激励金属板条波导CO2激光器的功率输出特性

为了获得较高的激光输出功率，介绍了射频激励扩散冷却全金属板条波导CO2激光器，放电区域由左右两个铝合金壁和上下两个铝合金电极构成，放电区域高2 mm，宽20 mm，长386 mm，工作气体混合比CO2:N2:He:Xe=1:1:3:0.26，该技术代替了过去的金属陶瓷结构，结合纵向电压均匀分布技术和面增比技术，获得了127 W的激光输出功率，光电转换效率高达14%。实验中，照相机放在激光器的纵向轴心上，清楚地记录了CO2激光器的放电现象。实验结果表明，该激光器小信号增益1%/cm，饱和光强1 200 W/cm2，促进了CO2激光器的发展。

Power output characteristic of RF excited all metal slab waveguide CO2 laser

In order to get the high output power, a RF excited diffusively cooled all-metal slab waveguide CO2 laser was reported, in which gas discharge region was constructed by two aluminum side walls and aluminum electrodes. The region dimension was 2 mm height×20 mm width×386 mm length, and the gas composition was CO2:N2:He:Xe=1:1:3:0.26. This technique replaced the old ceramic and metal sandwich waveguide technique.The optimum out power 127 W was achieved from the RF excited diffusively cooled all-metal slab waveguide CO2 laser with the longitudinal voltage uniformity distribution technique and scaling area technique. The electro-optic conversion efficiency was about 14%. In the experiment, the camera was placed on the longitudinal axis of all-metal slab waveguide and recorded the discharge phenomenon of CO2 laser clearly. The experimental result shows that the small signal gain is 1%/cm, and the saturated intensity is 1 200 W/cm2. The laser technique will greatly promote the CO2 laser development.