DF/HF化学激光器高振动态基频谱线机理分析

Kinetics of the spectral lines of high vibration state in DF/HF Lasers

在采用冷泵浦反应体系的DF/HF化学激光器中多次观察到了DF分子4-3振动能级跃迁的谱线以及HF分子3-2振动能级跃迁的谱线.给出了几幅典型的光谱图,并理论计算了高振动态基频谱线的增益曲线.实验和理论分析显示,上述高振动态基频谱线并非直接产生于冷泵浦反应,F原子复合和热泵浦反应起到了重要作用.最后讨论了热泵浦反应和链泵浦反应对采用冷泵浦反应DF/HF激光器输出光谱、增益及增益区长度的影响.

Unusual spectral lines of the 4-3 vibration state transitions of DF molecules and the 3-2 vibration state transi- tions of HF molecules have been observed in the DF/HF lasers operated with cold pumping reaction. Several typical spectrums were given, and the gain coefficients of these fundamental spectral lines of the high vibration state were calcu- lated. Experimental results and theoretical calculations have shown that the kinetics process of these lines can not be explained by the cold pumping reaction only. The fluorine atom recombination and hot pumping reaction subsequently may be the main factors. The influences of hot pumping reaction and chain pumping reaction on the emission spectrum, gain and gain zone length of DF/HF lasers operated with the cold pumping reaction were discussed.