【作者】 汤媛媛； 刘文清； 阚瑞峰； 张玉钧； 许振宇； 张帅； 崔益本； 何莹；

【Author】 Tang Yuan-Yuan,Liu Wen-Qing,Kan Rui-Feng,Zhang Yu-Jun,Xu Zhen-Yu,Zhang Shuai,Cui Yi-Ben,He Ying Key Laboratory of Environmental Optics&Technology,Anhui Institute of Optics and Fine Mechanics,Hefei 230031,China

【机构】 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室；

【摘要】 <正>稳定同位索比值的测量在地质学、气象学和地球科学的研究中具有重要的应用价值。在水循环研究中,有关大气中的水汽同位素比值的测量对于揭示水汽来源以及水汽输送过程都有着重要的指示意义。由于水汽分子在红外波段有强吸收,适宜高灵敏吸收光谱的测量。本文介绍了基于室温脉冲量子级联激光器的水更多还原

【Abstract】 Stable-isotope ratio analysis is an important tool for geology,meteorology,and earth sciences.Measurements of water vapor isotope ratio are especially important in global water circulation for it can reveal the water source and vapor transmission process.Since it has strong absorption in infrared wavelength,it is suitable for high sensitive absorption spectra.The spectroscopy of direct absorption measurement of water isotope with the room-temperature pulsed quantum cascade laser has been introduced.The measurement relies on the frequency down-chirp that is induced when a current pulse is applied to a QC laser as a result of local heating during the pulse.This down-chirp may cover a wave number range of up to 2.5cm-1 and can be used for sweeping across an absorption line to provide a real time display of the spectral feature.Combining with a multipass cell,this technology can satisfy the need for high sensitivity and accuracy.The results show that this experimental apparatus can fulfill the measurement of water vapor isotope in the atmosphere.更多还原