Journal
OPTICS EXPRESS
Volume 29, Issue 4, Pages 5121-5127Publisher
Optica Publishing Group
DOI: 10.1364/OE.418256
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Funding
- National Natural Science Foundation of China [62022032, 61875047, 61505041]
- Natural Science Foundation of Heilongjiang Province [YQ2019F006]
- Fundamental Research Funds for the Central Universities
- Heilongjiang Provincial Postdoctoral Science Foundation [LBH-Q18052]
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The quartz-enhanced photoacoustic-photothermal spectroscopy (QEPA-PTS) technique combines photoacoustic and photothermal signals to enhance sensor performance, successfully detecting 1.01% water vapor. Proposed improvements for further enhancement of this technique.
A trace gas detection technique of quartz-enhanced photoacoustic-photothermal spectroscopy (QEPA-PTS) is demonstrated. Different from quartz-enhanced photoacoustic spectroscopy (QEPAS) or quartz-enhanced photothermal spectroscopy (QEPTS), which detected only one single kind of signal, QEPA-PTS was realized by adding the photoacoustic and photothermal signals generated from two quartz tuning forks (QTFs), respectively. Water vapor (H2O) with a volume concentration of 1.01% was selected as the analyte gas to investigate the QEPA-PTS sensor performance. Compared to QEPAS and QEPTS, an enhanced signal level was achieved for this QEPA-PTS system. Further improvement of such a technique was proposed. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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