Development of a Quantum Cascade Laser-Based Sensor for Environmental HONO Monitoring in the Mid-Infrared at 8 μm - Université du Littoral Côte d'Opale Accéder directement au contenu
Article Dans Une Revue Journal of Lightwave Technology Année : 2019

Development of a Quantum Cascade Laser-Based Sensor for Environmental HONO Monitoring in the Mid-Infrared at 8 μm

Xiao-Juan Cui
Runqing Yu
  • Fonction : Auteur
Wei-Dong Chen
Zhi-Rong Zhang
  • Fonction : Auteur
Tao Pang
  • Fonction : Auteur
Peng-Shuai Sun
  • Fonction : Auteur
Hua Xia
  • Fonction : Auteur
Bian Wu
  • Fonction : Auteur
Feng-Zhong Dong

Résumé

The development of a fast in situ optical sensor based on a continuous-wave quantum cascade laser operating at 8 μm for the measurement of environmental gaseous nitrous acid (HONO) is reported. A strong absorption line at 1252.2109 cm -1 is found to be free of interferences and used for the first time for ambient HONO detection. Loss of HONO on the wall of the gas sample absorption cell is evaluated. The resulting 1-s detection limit for HONO is 110 pptv with a folded path length of 172 m. Continuous monitoring of HONO and NO 2 mixing ratios variations along with the basic meteorological parameters was performed during a field campaign of several days. Typical photochemical reactions of HONO have been observed on sunny and snowy days. Atmospheric HONO mixing ratios observed in this study indicate that direct emission from traffic exhausts and local heterogeneous reactions is potentially important sources of HONO.
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Dates et versions

hal-04290673 , version 1 (17-11-2023)

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Citer

Xiao-Juan Cui, Runqing Yu, Wei-Dong Chen, Zhi-Rong Zhang, Tao Pang, et al.. Development of a Quantum Cascade Laser-Based Sensor for Environmental HONO Monitoring in the Mid-Infrared at 8 μm. Journal of Lightwave Technology, 2019, 37 (11), pp.2784-2791. ⟨10.1109/JLT.2018.2876672⟩. ⟨hal-04290673⟩

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