激光技术2016，Vol.40Issue(6)：796-800,5.DOI:10.7510/jgjs.issn.1001-3806.2016.06.005
3 kW射频板条CO2激光器抛物面非稳波导腔研究
Research on unstable-waveguide hybrid resonator of parabolic mirrors for 3kW radio frequency slab CO2 laser
严拓 1郭海平 1王振 1王炜 1唐霞辉 1王度2
作者信息
- 1. 华中科技大学 光学与电子信息学院，武汉430074
- 2. 中国工程物理研究院 激光聚变研究中心，绵阳621900
- 折叠
摘要
Abstract
In order to improve the beam quality of traditional spherical mirror cavity in 3kW radio frequency slab CO2 laser, a new negative branch unstable-waveguide hybrid resonator with parabolic mirrors was designed. Based on Rayleigh-Sommerfeld diffraction theory for scalar beam, the influence of mirror type on optical field transmission characteristics of unstable hybrid waveguide cavity in the condition of large Fresnel number was studied. Based on rectangular waveguide theory and 1-D approximation, the waveguide propagation loss and polarization were analyzed. The research shows that, in the unstable direction, rear mirror and output mirror with paraboloid of curvature radius R1 =951. 32mm, R2 =1088. 68mm can avoid light leak of rear mirror and effectively improve the mode identification characteristic. Among common waveguide electrode coating materials, aluminum electrode can supply minimum waveguide propagation loss and transmission optical field is x polarization EH1 mode. Using unstable-waveguide hybrid resonator with parabolic mirrors whose electrodes are coated with aluminum can reduce loss and improve beam quality.关键词
激光器/射频板条CO2激光器/非稳波导混合腔/抛物面镜/瑞利-索末菲衍射/大菲涅耳数Key words
lasers/radio frequency slab CO2 laser/unstable-waveguide hybrid cavity/parabolic mirror/Rayleigh-Sommerfeld diffraction/large Fresnel number分类
信息技术与安全科学引用本文复制引用
严拓,郭海平,王振,王炜,唐霞辉,王度..3 kW射频板条CO2激光器抛物面非稳波导腔研究[J].激光技术,2016,40(6):796-800,5.
