电引发非链式脉冲DF激光器实验研究

为获取得高能脉冲中红外激光,对两种形式的电引发非链式脉冲DF化学激光器进行了研究。通过研究紫外预电离自持放电非链式脉冲DF化学激光器的输出特性,确定了最佳气压比,实现了350 mJ的DF激光脉冲输出,激光峰值功率为1.4 MW,激光能量比输出达35 J/l.101.3 kPa,电光转换效率约为1.6%;为突破预电离条件的限制,研究了非链式脉冲DF化学激光器的自引发体放电特性,通过采用针-盘电极对放电来模拟单通道放电的过程,利用非均匀场粗糙表面阴极,在注入能量密度高达200 J/l时实现了无预电离的稳定体放电。实验结果表明,采用自引发体放电技术有望实现更高能量的中红外激光输出。

Experimental research on electric-discharge non-chain pulsed DF lasers

To obtain high power mid-infrared laser,two types of electric-discharge DF lasers are discribed.The output performance of UV preionized non-chain pulsed DF laser is investigated,and the optimum mixing ratio is determinated.The experimental results show that the laser pulse energy is up to 350 mJ with electric efficiency about 1.6%,the peak power is 1.4 MW,and the specific laser energy is 35 J/l·101.3 kPa.In order to break the preionization limitation,the SIVD′s character of non-chain pulsed DF laser is dicussed carefully.The pin-plate electrodes discharging is used to stimulate a singal channel dicharging.With the condition of 200 J/l energy deposition,a volume discharge is formed in non-uniform electric-field rough cathode and even anode without preionization.The experimental results indicate that the form of SIVD is promising for creation of high energy DF laser.