期刊
SENSORS
卷 16, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/s16070989
关键词
QEPAS; cylindrical lens; planar laser; H2O quantification
资金
- National Natural Science Foundation of China [61505041, 91441130]
- Natural Science Foundation of Heilongjiang Province of China [F2015011]
- General Financial Grant from the China Postdoctoral Science Foundation [2014M560262]
- Special Financial Grant from the China Postdoctoral Science Foundation [2015T80350]
- Special Financial Grant from the Heilongjiang Province Postdoctoral Foundation [LBH-TZ0602]
- Financial Grant from the Heilongjiang Province Postdoctoral Foundation [LBH-Z14074]
- Fundamental Research Funds for the Central Universities [HIT.NSRIF.2015044]
- National Key Scientific Instrument and Equipment Development Projects of China [2012YQ040164]
- US National Science Foundation ERC MIRTHE award
- Welch Foundation [C-0586]
A novel quartz enhanced photoacoustic spectroscopy (QEPAS) trace gas detection scheme is reported in this paper. A cylindrical lens was employed for near-infrared laser focusing. The laser beam was shaped as a planar line laser between the gap of the quartz tuning fork (QTF) prongs. Compared with a spherical lens-based QEPAS sensor, the cylindrical lens-based QEPAS sensor has the advantages of easier laser beam alignment and a reduction of stringent stability requirements. Therefore, the reported approach is useful in long-term and continuous sensor operation.
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