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.
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CAO Jun-Cheng, LI Hua, HAN Ying-Jun, TAN Zhi-Yong, LU Jing-Tao, LUO Hui, LAFRAMBOISE Sylvain, LIU Hui-Chun. Terahertz Quantum Cascade Laser at 3.39THz [J]. Chin. Phys. Lett., 2008, 25(3): 953-956.
WANG Ling-Fang, SHARPLES Thomas-Roben. Monitoring Hydrogen Sulfide Using a Quantum Cascade Laser Based Trace Gas Sensing System[J]. Chin. Phys. Lett., 2011, 28(6): 067805. DOI: 10.1088/0256-307X/28/6/067805
WANG Ling-Fang, SHARPLES Thomas-Roben. Monitoring Hydrogen Sulfide Using a Quantum Cascade Laser Based Trace Gas Sensing System[J]. Chin. Phys. Lett., 2011, 28(6): 067805. DOI: 10.1088/0256-307X/28/6/067805
WANG Ling-Fang, SHARPLES Thomas-Roben. Monitoring Hydrogen Sulfide Using a Quantum Cascade Laser Based Trace Gas Sensing System[J]. Chin. Phys. Lett., 2011, 28(6): 067805. DOI: 10.1088/0256-307X/28/6/067805
WANG Ling-Fang, SHARPLES Thomas-Roben. Monitoring Hydrogen Sulfide Using a Quantum Cascade Laser Based Trace Gas Sensing System[J]. Chin. Phys. Lett., 2011, 28(6): 067805. DOI: 10.1088/0256-307X/28/6/067805
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