超音速氮稀释连续波HF化学激光器小信号增益测量

摘要

以氮为稀释剂的电激励连续波HF/DF化学激光器可以使用低温吸附泵代替传统的机械真空泵和洗消装置,大幅度降低激光器的系统体积和重量.使用小信号增益测量系统对某超音速氮稀释电激励连续波HF化学激光器的增益分布进行了测量.得到了在4种不同激光功率下R(4),P1(6),P2(4)～P2(6)谱线的增益系数分布曲线.测得P2(4)为最强增益谱线,最大值为0.1 cm-1；最强增益位置与最佳光轴位置相符;超音速气流使增益区延伸达2.5 cm.%Cryogenic adsorption technique may replace machinery pump and exhaust processing system, hence nitrogen dilution is used in discharge-driven continuous wave(CW) HF/DF chemical laser, which can greatly reduce the size and weight of laser system. The gain distribution of supersonic discharge-driven CW HF chemical laser is measured by small signal gain measurement system. Gain distribution curves of P1 (4) , P1 (6) , P2 (4) , P2 (5) , P2 (6) are obtained at four different laser power, and the highest gain spectral line is P2 (4) with the highest gain of 0. 1 cm-1. The position of the highest gain is just the best position of optical axis. Under supersonic air stream, the gain zone extends to 2. 5 cm.