基于发射光谱的DF激光器光腔温度与粒子数分布

Calculation of temperature and population distribution in DF laser cavity based on emission spectrum

建立了谱线增益系数与温度、粒子数分布之间及谱线增益系数与谱线强度之间的关系式,对一台燃烧驱动DF激光器的发射光谱进行了测量,利用发射光谱数据计算得到光腔温度为381.4K,分布在振动态能级1与0,振动能级2与1,振动能级3与2的粒子数之比分别为0.60～0.62,0.676 4,0.71～0.74。

The relational expressions between gain coefficient,intensity of spectral lines and the temperature,population distribution in optical cavity were established,and the emission spectrum of a combustion-driven DF chemical laser was measured,calculation based on spectral data showed that the temperature in optical cavity was 381.4 K,the ratio of population in ν=1 vibration level to ν=0 level,population in ν=2 level to ν=1 level,and population in ν=3 level to ν=2 level were 0.60~0.62,0.676 4,0.71~0.74,respectively.