连续波DF化学激光器光斑上下游光谱测量

通过分析非稳腔DF化学激光器光腔内激光路径特性，指出非稳腔DF化学激光器输出光斑上下游光谱振荡路径不同导致输出光谱存在一定差异。试验测量了一台连续波DF化学激光器光斑上下游光谱，结果表明:非稳腔DF化学激光器光斑上下游光谱主要谱线成分未见显著差异；光斑上下游谱线相对强度存在一定差异；光斑上游各谱带相对强度最大值谱线转动量子数趋向于各谱带低转动量子数方向。根据实测光谱，对光斑上下游光谱所表征光腔温度和相对粒子数范围进行了估算，得到光腔上游平均温度要低于光腔下游平均温度。

Measurement of upstream and downstream spectra of continuous-wave DF chemical laser spot

According to the analysis of the characteristics of oscillation paths in the optical cavity of the unstable-resonator DF chemical laser, we point out that different oscillation paths of the upstream and downstream spectra will lead to certain difference in the emission spectrum. The emission spectrum of a continuous-wave DF laser was measured, and it is found that there is no significant difference in the major spectral line components, but some difference in the relative intensity of the upstream and downstream spectral lines. The spectral band of the upstream laser spot, namely the rotational quantum number at maximum relative intensity, tends to be in the direction of the low rotational quantum number for each spectral band. According to the measured spectrum, the cavity temperature and particle population ratio were estimated, and it is found that the average temperature of the upstream cavity is lower than that of the downstream cavity.