摘要
介绍了利用紫外预电离和横向放电结构建立的非链式电激励脉冲HF激光装置,对激光工作介质SF6/C2H6混合气体的放电特性以及不同气体总压和气体分数比条件下的激光能量变化进行了研究,并对激光脉冲信号和近场光斑的空间分布进行了实验测量。实验结果表明:混合气体的放电过程具有辉光放电、电压维持和电弧放电的阶段性特点。为获得最佳的激光输出,混合气体中的C2H6含量应控制在6%～8%之间,并且不同混合气体总压对应着不同的最佳充电电压。在充电电压为28 kV、总气压为12 kPa、C2H6含量为8%时获得最大单脉冲能量为0.6 J,比能量输出达到8.5 J/l,激光器的电光转换效率约为2.5%。
The design and performance of a non-chain transverse excited HF laser with UV pre-ionization was described.Electric discharge characteristics of gas mixtures of SF6/C2H6 were investigated for various initial conditions by recording the temporal evolution of discharge current and voltage.The laser pulse energy was studied in different gas pressure and fraction.Laser pulse signal and laser beam pattern in near field were measured.The results show that the discharge process of gas mixtures has three phases： glow discharge,voltage keep and arc discharge.For the laser operating efficiently,the optimal C2H6 concentration should be about 6% to 8% and different gas pressures are corresponding to the different optimal charging voltage.The maximal output energy 0.6 J was achieved under the condition of 28 kV charging voltage and 12 kPa gas pressure with 8% C2H6 concentration.Specific output energy 8.5 J/l and laser electrical conversion efficiency 2.5% were obtained.
出处
《红外与激光工程》
EI
CSCD
北大核心
2010年第6期1026-1029,共4页
Infrared and Laser Engineering
基金
国家重点实验室基金资助项目(SKLLIM0902)
