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1.315μm附近CO₂的高分辨率吸收光谱

High-resolution absorption spectra of CO₂ near 1.315μm

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【Author】 WU Chengjiu,YUAN Yiqian,CAO Bailing,MA Zhijun,GONG Zhiben(Anhui Institute of Optics and Fine Mechanics, the Chinese Academy of Sciences, P.O.Box 1125, Hefei 230031, China)

【机构】中国科学院安徽光学精密机械研究所国家八六三计划大气光学重点实验室；中国科学院安徽光学精密机械研究所国家八六三计划大气光学重点实验室安徽合肥230031；安徽合肥230031；安徽合肥230031；

【摘要】利用可调谐激光长程吸收光谱测量系统,记录到1.315μm附近高气压(80kPa和40kPa)CO2的高分辨率吸收光谱,拟合分析获得谱线参数,结果与HITRAN2k的数据基本一致。用程差法测量了绝对吸收,氧碘激光频率(7603.1385cm-1)的总吸收截面为(0.23～0.29)×10-24cm2。仅计算谱线吸收的吸收截面为0.18×10-24cm2。在1.315μm波段CO2存在连续吸收,吸收截面为(0.05～0.11)×10-24cm2。还讨论了测量误差问题。更多还原

【Abstract】 Using a laser longpath experimental system which White cell with CO2 of 80 or 40 kPa, the highresolution absorption spectra of CO2 near 1.315μm have been recorded and the spectroscopic line parameters are obtained. They are comparable with the data in HITRAN 2k. The absolute absorption is determined by means of path differencing. The total absorption cross section is (0.23～0.29)×10-24cm2 for CO2 at 7 603.138 5cm-1, and the absorption cross section comes of the spectroscopic lines is 0.18×10-24cm2. There is continuum absorption in this region and the continuum absorption cross section is (0.05～0.11) ×10-24cm2. The error is discussed as well. 更多还原