All-optical Light-induced Thermoacoustic Spectroscopy for Remote and Non-contact Gas Sensing
Overview
Authors
Affiliations
All-optical light-induced thermoacoustic spectroscopy (AO-LITS) is reported for the first time for highly sensitive and selective gas sensing, in which a commercial standard quartz tuning fork (QTF) is employed as a photothermal detector. The vibration of the QTF was measured by the highly sensitive fiber-optic Fabry-Pérot (FP) interferometry (FPI) technique, instead of the piezoelectric detection in the conventional LITS. To improve the stability of the sensor system, a compact QTF-based fiber-optic FPI module is fabricated by 3D printing technique and a dual-wavelength demodulation method with the ellipse-fitting differential-cross-multiplication algorithm (DW-EF-DCM) is exploited for the FPI measurement. The all-optical detection scheme has the advantages of remote detection and immunity to electromagnetic interference. A minimum detection limit (MDL) of 422 ppb was achieved for hydrogen sulfide (HS), which was ~ 3 times lower than a conventional electrical LITS sensor system. The AO-LITS can provide a promising approach for remote and non-contact gas sensing in the whole infrared spectral region.
Cantilever-enhanced dual-comb photoacoustic spectroscopy.
Wang J, Wu H, Liu X, Wang G, Wang Y, Feng C Photoacoustics. 2024; 38:100605.
PMID: 39678733 PMC: 11639708. DOI: 10.1016/j.pacs.2024.100605.
Pan Y, Lu P, Cheng L, Li Z, Liu D, Zhao J Photoacoustics. 2023; 34:100573.
PMID: 38076438 PMC: 10701083. DOI: 10.1016/j.pacs.2023.100573.
Sun B, Patimisco P, Sampaolo A, Zifarelli A, Spagnolo V, Wu H Photoacoustics. 2023; 33:100553.
PMID: 38021294 PMC: 10658605. DOI: 10.1016/j.pacs.2023.100553.
Humidity Sensors Based on Metal-Organic Frameworks.
Wu K, Fei T, Zhang T Nanomaterials (Basel). 2022; 12(23).
PMID: 36500831 PMC: 9740828. DOI: 10.3390/nano12234208.