26 January 2009 Continuous monitoring of nitric oxide at 5.33 μm with an EC-QCL based Faraday rotation spectrometer: laboratory and field system performance
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Abstract
Nitric oxide detection with Faraday rotation spectroscopy offers excellent sensitivity and high specificity together with outstanding long term system performance. Development of a transportable, cryogen-free, prototype field instrument based on mode-hop-free external cavity quantum cascade laser targeting the optimum NO Q(3/2) transition at 1875.8 cm-1 is reported . The system shows a minimum detection limit of 5.4 ppb with a 1sec. lock-in time constant. Continuous, unattended NO monitoring with >1 hour white noise limited averaging times is reported.
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Gerard Wysocki, Gerard Wysocki, Rafal Lewicki, Rafal Lewicki, Xue Huang, Xue Huang, Robert F. Curl, Robert F. Curl, Frank K. Tittel, Frank K. Tittel, "Continuous monitoring of nitric oxide at 5.33 μm with an EC-QCL based Faraday rotation spectrometer: laboratory and field system performance", Proc. SPIE 7222, Quantum Sensing and Nanophotonic Devices VI, 72220M (26 January 2009); doi: 10.1117/12.809354; https://doi.org/10.1117/12.809354
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