Chin. Phys. Lett.  2011, Vol. 28 Issue (6): 067805    DOI: 10.1088/0256-307X/28/6/067805
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Monitoring Hydrogen Sulfide Using a Quantum Cascade Laser Based Trace Gas Sensing System
WANG Ling-Fang1,2**, SHARPLES Thomas-Roben2
1Microsystem Research Center, Chongqing University, Chongqing 400030
2Department of Chemistry, University of Oxford, Oxford, England, UK
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WANG Ling-Fang, SHARPLES Thomas-Roben 2011 Chin. Phys. Lett. 28 067805
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Abstract We present the detection of hydrogen sulfide (H2S) in a quantum cascade laser (QCL) based gas sensing system employing direct laser absorption spectroscopy. The sensitivity is obtained to be 3.61×10−6 cm−1Hz−1/2 and the H2S broadening coefficient in N2 is analyzed by fitting to the plot of the Lorentzian half width at the half maximum as a function of N2 pressure is 0.1124 ±0.0031 cm−1⋅atm−1. A simulation based on data from the HITRAN database shows broad agreement with the experimentally obtained spectrum.
Keywords: 78.20.Ci      82.80.Dx      07.57.Ty     
Received: 21 February 2011      Published: 29 May 2011
PACS:  78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))  
  82.80.Dx (Analytical methods involving electronic spectroscopy)  
  07.57.Ty (Infrared spectrometers, auxiliary equipment, and techniques)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/28/6/067805       OR      https://cpl.iphy.ac.cn/Y2011/V28/I6/067805
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WANG Ling-Fang
SHARPLES Thomas-Roben
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