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7 November 2018 External cavity quantum cascade laser based gas sensor for chemical detection
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Proceedings Volume 10832, Fifth Conference on Frontiers in Optical Imaging Technology and Applications; 108320J (2018) https://doi.org/10.1117/12.2506670
Event: Fifth Conference on Frontiers in Optical Imaging Technology and Applications, 2018, Changchun, China
Abstract
Mid-infrared (MIR) laser spectroscopy is a powerful analytical tool for trace gases sensing, since a number of atmospheric pollutants and greenhouse gases have strong fundamental vibrational transitions within this spectral range. Here, we report the development of mid-infrared spectroscopy techniques coupled with a broadband tunable external-cavity (EC) mode-hop-free quantum cascade laser (QCL) operating between 6.96 and 8.85 μm. The ECQCL sensor was evaluated for quantitative and qualitative analysis of volatile organic compound (VOC) components. For signal processing, a self-established spectral analysis model integrated with various algorithms was developed for VOC spectral analysis. A good agreement was obtained between the experimentally observed spectra and the standard reference spectra taken from Pacific Northwest National Laboratory (PNNL) database.
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Jing Yu, Qiming Lv, and Jingsong Li "External cavity quantum cascade laser based gas sensor for chemical detection", Proc. SPIE 10832, Fifth Conference on Frontiers in Optical Imaging Technology and Applications, 108320J (7 November 2018); https://doi.org/10.1117/12.2506670
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