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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。
In order to obtain a high-energy pulsed mid-infrared laser, two types of electrically triggered non-chain pulsed DF chemical lasers have been studied. By researching the output characteristics of ungapped pulsed DF chemical laser with preionization, the optimal pressure ratio was determined and the DF laser pulse output of 350 mJ was achieved. The peak laser power was 1.4 MW and the laser energy output was 35 J / l.101.3 kPa, and the electro-optical conversion efficiency is about 1.6%. In order to overcome the limitation of pre-ionization conditions, the self-initiating bulk discharge characteristics of an unchained pulsed DF chemical laser were studied. Single-channel discharge was simulated by using pin- Using a non-uniform field rough surface cathode, a stable discharge without pre-ionization was achieved at implanting energy densities as high as 200 J / l. Experimental results show that self-initiated body discharge technology is expected to achieve higher energy mid-infrared laser output.