A Low-Cost and High-Stability Demodulation Method for Photothermal Spectroscopy Gas Detection in Power Transformer
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DOI: 10.1109/jsen.2025.3542318
Abstract: Dissolved gas analysis is a critical component of transformer defect diagnosis. Oil-dissolved gas sensing based on fiber-optic photothermal spectroscopy was proposed for it is immune to electromagnetic interference. Traditional methods apply sinusoidal modulation to the… read more here.
Keywords: detection; spectroscopy; photothermal spectroscopy; method ... See more keywords
Dual-wavelength Mach-Zehnder interferometry-assisted photothermal spectroscopy for characterization of surface contaminants.
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DOI: 10.1364/oe.404924
Abstract: Photothermal spectroscopy (PTS) working in the mid-infrared region is an effective technique for in-situ characterization of the chemical composition of surface contaminants. The sensitivity relies on the way that the laser-induced response of the sample… read more here.
Keywords: phase; mzi; surface contaminants; spectroscopy ... See more keywords
Quartz-enhanced photoacoustic-photothermal spectroscopy for trace gas sensing.
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DOI: 10.1364/oe.418256
Abstract: 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… read more here.
Keywords: gas; quartz enhanced; enhanced photoacoustic; photoacoustic photothermal ... See more keywords