基于多激光源的石英增强光声传感器用于依次检测一氧化氮、二氧化硫和氨气
Quartz-Enhanced Photoacoustic Sensor Based on a Multi-Laser Source for In-Sequence Detection of NO, SO, and NH.
作者信息
Patimisco Pietro, Ardito Nicoletta, De Toma Edoardo, Burghart Dominik, Tigaev Vladislav, Belkin Mikhail A, Spagnolo Vincenzo
机构信息
PolySense Lab-Dipartimento Interateneo di Fisica, Politecnico and University of Bari, Via Amendola 173, I-70100 Bari, Italy.
Polysense Innovations Srl 2, Via Amendola 173, I-70100 Bari, Italy.
出版信息
Sensors (Basel). 2023 Nov 6;23(21):9005. doi: 10.3390/s23219005.
In this work, we report on the implementation of a multi-quantum cascade laser (QCL) module as an innovative light source for quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing. The source is composed of three different QCLs coupled with a dichroitic beam combiner module that provides an overlapping collimated beam output for all three QCLs. The 3λ-QCL QEPAS sensor was tested for detection of NO, SO, and NH in sequence in a laboratory environment. Sensitivities of 19.99 mV/ppm, 19.39 mV/ppm, and 73.99 mV/ppm were reached for NO, SO, and NH gas detection, respectively, with ultimate detection limits of 9 ppb, 9.3 ppb, and 2.4 ppb for these three gases, respectively, at an integration time of 100 ms. The detection limits were well below the values of typical natural abundance of NO, SO, and NH in air.
在本工作中，我们报道了一种多量子级联激光器（QCL）模块的应用，该模块作为一种创新光源用于石英增强光声光谱（QEPAS）传感。该光源由三个不同的QCL与一个二向色光束组合器模块耦合而成，该组合器模块为所有三个QCL提供重叠的准直光束输出。在实验室环境中，对3λ-QCL QEPAS传感器依次进行了NO、SO和NH检测测试。对于NO、SO和NH气体检测，灵敏度分别达到19.99 mV/ppm、19.39 mV/ppm和73.99 mV/ppm，在100 ms积分时间下，这三种气体的最低检测限分别为9 ppb、9.3 ppb和2.4 ppb。这些检测限远低于空气中NO、SO和NH典型自然丰度的值。
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