温度对CO光谱线吸收的影响分析

Effect of temperature on absorption spectral lines of carbon monoxide

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MAT-LAB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 llne shape function and absorption eoeft＇ieients 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 efteet of temperature on carbon monoxide absorption spectral lines, especially on the comprehensive widened line shape tunetion, is complex and that difl^rent 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 earl）on monoxide in practical application.