基于TDLAS技术1.65μm附近乙烷分子高分辨吸收光谱测量

Measurement of Ethane Spectrum with High Resolution near 1.65μm Based on TDLAS

基于可调谐半导体激光光谱(TDLAS)技术,结合实验室自制程长可达50 m的Herriot池,使用波长计对乙烷吸收谱线进行了准确定标,并根据记录的光谱数据,精确测量了6039～6054 cm^(-1)波段内71条乙烷分子的谱线(中心位置及谱线强度),最小可探测谱线吸收强度为10^(-25)cm^(-1)/(molecule·cm^(-2)),对结果及误差进行了详细分析,为进一步研究天然气提供了重要参考。

Based on tunable diode laser absorption spectroscopy(TDLAS) technology,combining a Herriot cell with optical length of 50 m,using a wave-length-meter to scale the positions of the lines,the positions and intensities of 71 ethane lines between 6039 cm^(-1) and 6054 cm^(-1) are precisely measured,and the minimum detection absorption intensity reaches 10^(-25) cm^(-1)/(molecule.cm^(-2)).Results and errors are analyzed in detail, which is very useful to carry on research of natural gas in further