摘要
提出了一种新型的大功率转流二氧化碳激光器.该激光器采用了圆形金属腔结构、腔内转流的设计,具有体积小、造价低和光束质量好等特点.利用五能级近似模型和四阶龙格库塔法对腔内增益分布进行了理论计算,主要对腔内增益分布随风速、工作气压、气体配比和电极位置等关键影响因素的变化进行了讨论,且在协调各影响因素的条件下得到较理想的腔内增益分布.同时提出了一种四金属腔结构的优化方案.
A novel high power rotational flow CO2 laser is introduced. A circular metal cavity and rotational flow structure are used in this laser. It has the advantages of small size, low cost and good beam quality. The theoretical calculation of the gain distribution in the cavity is conducted by five-energy-level model and four order Runge-Kutta. The major work of this calculation is focused on the cavity gain distribution change according to the variation of several key parameters, such as gas flow speed, gas pressure, gas mixture rate, electrode position and so on. As a result, pretty good cavity gain distribution was obtained by optimized parameters. Meanwhile, an improved ＂four metal cavities＂ structure, which could obtain even better gain distribution, is introduced.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2008年第4期111-116,共6页
Engineering Journal of Wuhan University
基金
武汉"晨光"计划(编号:20065004116-04)
教育部"新世纪优秀人才支持计划"(编号:NCET-07-0629)
高等学校博士点基金项目(编号:200604086036)
教育部留学回国人员科研启动基金项目(编号:2006331)
测绘遥感信息工程国家重点实验室基金项目(编号:060401)
关键词
二氧化碳激光器
转流
增益分布
光束质量
CO2 laser
rotational flow
gain distribution
laser beam quality
