McAllister G L, Draggoo V G, Eguchi R G
Appl Opt. 1975 Jun 1;14(6):1290-6. doi: 10.1364/AO.14.001290.
A high efficiency CO, e(-)-beam sustained electric discharge laser has been operated at 500 J/pulse with near diffraction limited beam quality. The high Fresnel number cavity configuration employs a confocal unstable resonator with a geometric magnification of approximately 2.5. In spite of the high quantum efficiency of the CO laser, significant fractions of the pumping energy are absorbed in the gas as bulk heating giving rise to acoustic waves that refract portions of the light from the beam axis. The strength of the density waves have been measured using interferometric techniques and correlate well with the observed refraction of the laser light.
一台高效的一氧化碳电子束持续放电激光器已实现每脉冲500焦耳的输出，且光束质量接近衍射极限。高菲涅耳数腔配置采用了几何放大倍数约为2.5的共焦非稳腔。尽管一氧化碳激光器具有很高的量子效率，但相当一部分泵浦能量在气体中以体加热的形式被吸收，从而产生声波，使部分光线偏离光束轴方向折射。已使用干涉测量技术测量了密度波的强度，其与观察到的激光折射情况具有良好的相关性。
