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  1. No Access

    Article

    Dual quantum cascade laser-based sensor for simultaneous NO and NO2 detection using a wavelength modulation-division multiplexing technique

    A sensor system capable of simultaneous measurements of NO and NO2 was developed using a wavelength modulation-division multiplexing (WMDM) scheme and multi-pass absorption spectroscopy. A continuous wave (CW), d...

    Yajun Yu, Nancy P. Sanchez, Fan Yi, Chuantao Zheng, Weilin Ye… in Applied Physics B (2017)

  2. No Access

    Article

    Measurements of carbon monoxide mixing ratios in Houston using a compact high-power CW DFB-QCL-based QEPAS sensor

    Measurements of carbon monoxide (CO) mixing ratios in Houston, Texas, during the period from May 16, 2013 to May 28, 2013 were performed using a sensitive, selective, compact, and portable quartz-enhanced pho...

    Przemysław Stefański, Rafał Lewicki, Nancy P. Sanchez, Jan Tarka… in Applied Physics B (2014)