为了研究温度变化对CO吸收光谱线的影响, 首先从吸收光谱原理出发, 采用理论分析的方法, 并利用高分辨率分子透射吸收数据库得出与温度有关的CO吸收光谱线谱线强度、综合加宽线型函数和吸收系数, 然后通过MATLAB数值仿真出温度与CO吸收光谱线的谱线强度、综合加宽线型函数和吸收系数的变化关系曲线, 并分析讨论温度与它们的关系。结果表明, 温度对CO吸收光谱线的影响, 特别是对综合加宽线型函数的影响是复杂的, 并且不同激光频率还会影响线型函数和吸收系数随温度的变化关系, 这对于实际应用中CO的吸收与测量具有重要的参考价值。

To study the influence of temperature change on carbon monoxide absorption spectral lines, at first, the temperature-relative parameters, such as carbon monoxide absorption spectral lines intensity, comprehensive widened line shape function and absorption coefficients were obtained based on high-resolution transmission molecular absorption database. Then starting from absorption spectrum principle, the temperature-relative parameters were simulated with MATLAB and the temperature-relative curves were drawn. The results show that the effect of temperature on carbon monoxide absorption spectral lines, especially on the comprehensive widened line shape function, is complex and that different laser frequencies also affect the relationship of temperature and comprehensive widened line shape function and the absorption coefficients, which gives some advice for the absorption and measurement of carbon monoxide in practical application.