Quartz-enhanced photoacoustic spectroscopy (QEPAS) with a single-tube acoustic microresonator (AmR) inserted between the prongs of a custom quartz tuning fork (QTF) was developed, investigated, and optimized experimentally. Due to the high acoustic coupling efficiency between the AmR and the QTF, the single-tube on-beam QEPAS spectrophone configuration improves the detection sensitivity by 2 orders of magnitude compared to a bare QTF. This approach significantly reduces the spectrophone size with respect to the traditional on-beamspectrophone configuration, thereby facilitating the laser beam alignment. A 1 sigma normalized noise equivalent absorption coefficient of 1.21 x 10(-8) cm(-1) . W/root Hz was obtained for dry CO2 detection at normal atmospheric pressure.
Single-tube on-beam quartz-enhanced photoacoustic spectroscopy / Zheng, Huadan; Dong, Lei; Sampaolo, Angelo; Wu, Hongpeng; Patimisco, Pietro; Yin, Xukun; Ma, Weiguang; Zhang, Lei; Yin, Wangbao; Spagnolo, Vincenzo Luigi; Jia, Suotang; Tittel, Frank K.. - In: OPTICS LETTERS. - ISSN 0146-9592. - 41:5(2016), pp. 978-981. [10.1364/OL.41.000978]
Single-tube on-beam quartz-enhanced photoacoustic spectroscopy
Patimisco, Pietro;SPAGNOLO, Vincenzo Luigi;
2016-01-01
Abstract
Quartz-enhanced photoacoustic spectroscopy (QEPAS) with a single-tube acoustic microresonator (AmR) inserted between the prongs of a custom quartz tuning fork (QTF) was developed, investigated, and optimized experimentally. Due to the high acoustic coupling efficiency between the AmR and the QTF, the single-tube on-beam QEPAS spectrophone configuration improves the detection sensitivity by 2 orders of magnitude compared to a bare QTF. This approach significantly reduces the spectrophone size with respect to the traditional on-beamspectrophone configuration, thereby facilitating the laser beam alignment. A 1 sigma normalized noise equivalent absorption coefficient of 1.21 x 10(-8) cm(-1) . W/root Hz was obtained for dry CO2 detection at normal atmospheric pressure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
