A Sensitive Gas Sensor Based on Quantum Cascade Laser for Ambient Nitrous Oxide Monitoring

Journal of Atmospheric and Environmental Optics ›› 2012, Vol. ›› Issue (3): 191-195.

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A Sensitive Gas Sensor Based on Quantum Cascade Laser for Ambient Nitrous Oxide Monitoring

TANG Yuan-yuan, LIU Wen-qing, KAN Rui-feng, LIU Jian-guo, XU Zhen-yu, RUAN Jun, YAO Lu

(Key Laboratory of Enviromental Optics&Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China)

Received:2011-11-12 Revised:2012-02-23 Online:2012-05-28 Published:2012-05-24

Abstract

Abstract:

A set of gas sensor based on quantum cascade laser (QCL) for ambient nitrous oxide (N2O) monitoring is introduced. QCL is utilized in the center wavelength of 1274 cm-1, combining with multi-pass absorption cell. By taking the advantages of long pulsed QCL which produces a complete scan of molecular absorption lines of gases, high sensitive measurement of N2O can be realized. Integrated software provides data analysis according to HITRAN04 database, without calibration gas. A detection limit of 13 ppb is obtained by analyzing the standard deviation and the detection of N2O in the atmosphere is realized.

Key words: quantum cascade laser, infrared absorption spectroscopy, environmental monitoring

CLC Number:

TN248
X831

SHANG Yuan-Yuan, LIU Wen-Qing, KAN Rui-Feng, LIU Jian-Guo, XU Zhen-Yu, RUAN Jun, YAO Lu. A Sensitive Gas Sensor Based on Quantum Cascade Laser for Ambient Nitrous Oxide Monitoring[J]. Journal of Atmospheric and Environmental Optics, 2012, (3): 191-195.

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A Sensitive Gas Sensor Based on Quantum Cascade Laser for Ambient Nitrous Oxide Monitoring

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