HCN激光器小型化及工作参数优化  

Optimum on working parameters of short cavity HCN laser

作　　者：王成鑫 申俊杰 刘海庆 魏学朝 揭银先[2] 张际波 WANG Cheng-xin;SHEN Jun-jie;LIU Hai-qing;WEI Xue-chao;JIE Yin-xian;ZHAGN Ji-bo(School of Mechanical Engineering, Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin 300384, China;Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

机构地区：[1]天津理工大学机械工程学院天津市先进机电系统设计与智能控制重点实验室机电工程国家级实验教学示范中心,天津300384 [2]中国科学院等离子体物理研究所,合肥230031

出　　处：《天津理工大学学报》2018年第4期9-14,共6页Journal of Tianjin University of Technology

基　　金：国际热核聚变实验堆(ITER)计划专项(2012GB101002;1014GB106002);国家自然科学基金(11105184;11375237;51605330);天津市自然科学基金(12JCYBJC32100)

摘　　要：对大功率连续波氰化氢(HCN)激光器进行了小型化,成功研制了谐振腔长度分别为2 m和1 m的小型化HCN激光器.改进了激光器的阴极腔头结构和阴极过渡段连接结构,对小型化激光器进行了系统的参数优化实验,同时使用了绝对功率计和光束分析仪对激光器的功率进行定标,使激光器的功率测量更为准确.在工作气体配比为N_2∶CH_4∶H_2=1∶1∶5的条件下,对影响小型HCN激光器功率输出的各种参数进行了优化调试实验,实验结果表明:2 m激光器的最佳参数为放电管内径为(50±0.5)mm、耦合输出栅网500线/英寸、混合气体工作流量是10 mL/min、激光管外壁温度160℃、激光器工作电流0.65 A、工作气体气压为29 Pa时,功率输出最大为2.1 m W.1 m激光器的最佳参数为:放电管内径为(30±0.5)mm、耦合输出栅网500线/英寸、混合气体工作流量是3.2 mL/min、激光管外壁温度160℃、激光器工作电流0.6 A、工作气体压力8.6 Pa时,功率输出最大为0.6 m W.High-power continuous-wave hydrogen cyanide （HCN） lasers were miniaturized and successfully developed a resonant cavity length of 2 meters and 1 meter of HCN laser. The structure of the cathode cavity head structure and the cathode transition section of the laser are improved. A system parameter optimization experiment for miniaturized laser is carried out. At the same time, absolute power meter and beam analyzer are used to calibrate the power of the laser, so that the power measurement of the laser is more accurate. And the working gas ratio is N2：CH4：H2=1：1：5. The tests and experiments of the various parameters, which affect the output power of the short cavity HCN laser, are performed. It is shown that there exists a group of optimized parameters, under which the output power of the short cavity HCN laser reaches maximum, Optimum parameters for 2 meters laser： （50±0.5）mm of discharge tube diameter, 500 meshes of grid, 160℃ of waveguide wall temperature, 10 sccm of mixed gas flow, 0.65 A of laser current, working gas pressure 29 Pa, the output is up to 2.1 mW. Optimum parameters for 1 meter laser： （30±0.5） mm of discharge tub e diameter, 500 meshes of grid, 160℃ of wavegnide wall temperature, 3.2 sccm of mixed gas flow, 0.6 A of laser current and 8.6 Pa of working gas pressure, the output is up to 0.6 mW.

关 键 词：激光器 功率 最佳参数 小型化 结构优化 

分 类 号：TN248[电子电信—物理电子学] TN245