A single-quartz-enhanced dual spectroscopy (S-QEDS)-based trace gas sensor is reported for the first time, to the best of our knowledge. In S-QEDS, a quartz tuning fork (QTF) was utilized to detect the photoacoustic and photothermal signals simultaneously and added the two signals together. The S-QEDS technique not only improved the detection performance but also avoided the issue of resonant frequency mismatching of QTFs for the multi-QTFs-based sensor systems. Water vapor (${\rm H}_2{\rm O}$) was selected as the target gas to investigate the S-QEDS sensor performance. The photoacoustic, photothermal, and composited signals were measured, respectively, under the same conditions. The experimental results verified the ideal adding of the photoacoustic and photothermal signals by using a single QTF in this S-QEDS sensor system.

中文翻译：

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基于单石英增强的光声-光热双光谱的痕量气体感测

据我们所知，首次报道了基于单石英增强双光谱（S-QEDS）的痕量气体传感器。在S-QEDS中，石英音叉（QTF）用于同时检测光声和光热信号，并将这两个信号加在一起。S-QEDS技术不仅提高了检测性能，而且避免了基于多QTF的传感器系统QTF共振频率失配的问题。水蒸气（$ {\ rm H} _2 {\ rm O} $选择）作为目标气体，以研究S-QEDS传感器的性能。在相同条件下分别测量了光声，光热和复合信号。实验结果验证了在此S-QEDS传感器系统中使用单个QTF可以理想地添加光声和光热信号。