Photonic sensing of the atmosphere by absorption spectroscopy

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• 作者：Xiaojuan Cui^a ; ^b ; Christophe Lengignon^a ; Wu Tao^a ; ^c ; Weixiong Zhao^a ; ^b ; Gerard Wysocki^d ; Eric Fertein^a ; Cé ; cile Coeur^a ; Andy Cassez^a ; Laurence Croize^a ; Weidong Chen^a ; ^{chen@univ-littoral.fr} ; Yingjian Wang^b ; Weijun Zhang^b ; Xiaoming Gao^b ; Wenqing Liu^b ; Yujun Zhang^b ; Fengzhong Dong^b
• 关键词：Quantum cascade laser (QCL) ; Distributed feedback (DFB) diode laser ; Light emitting diode (LED) ; Absorption spectroscopy ; Hydroxyl free radical (OH) ; Nitrate radical (NO3) ; Nitrous acid (HONO) ; Nitrogen dioxide (NO2)
• 刊名：Journal of Quantitative Spectroscopy and Radiative Transfer
• 出版年：2012
• 期刊代码：70_00224073
• 类别：ch
• 出版时间：July, 2012
• 卷：113
• 期：11
• 页码：1300-1316
• 文件大小：1421 K

摘要

Chemically reactive atmospheric species play a crucial role in tropospheric processes which affect regional air quality and global climate change. Contrary to long-lived species such as greenhouse gases, interference-free accurate and precise concentration assessments of strongly reactive short-lived species represent a real challenge. In this paper, we report on the recent progress in spectroscopic instrumental developments for monitoring of OH, NO₃, HONO and NO₂ by using modern photonic sources (Quantum Cascade Laser, distributed feedback diode laser, light emitting diode) in conjunction with high-sensitivity spectroscopic measurement techniques such as multi-pass cell based long optical path length absorption spectroscopy, wavelength-modulation enhanced off-axis integrated cavity output spectroscopy, Faraday rotation spectroscopy, incoherent broadband cavity enhanced absorption spectroscopy. The main techniques available for routine atmospheric measurements of OH, NO₃ and HONO are overviewed, in comparison with the emerging modern photonic spectroscopy techniques.