Articles | Volume 12, issue 1
Regular research article
25 Jan 2023
Regular research article |  | 25 Jan 2023

Resonant photoacoustic cells for laser-based methane detection

Katrin Schmitt, Mara Sendelbach, Christian Weber, Jürgen Wöllenstein, and Thomas Strahl

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Cited articles

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Dong, L., Tittel, F. K., Li, C., Sanchez, N. P., Wu, H., Zheng, C., Yu, Y., Sampaolo, A., and Griffin, R. J.: Compact TDLAS based sensor design using interband cascade lasers for mid-IR trace gas sensing, Opt. Expr., 24, A528–A535,, 2016. 
Dumitras, D. C., Dutu, D. C., Matei, C., Magureau, A. M., Petrus, M., and Popa, C.: Laser photoacoustic spectroscopy: principles, instrumentation, and characterization, J. Optoelectron. Adv. Mat., 9, 12, 3655–3701, WOS:000251768700001, 2007. 
Short summary
We present a photoacoustic sensor enabling fast, inexpensive, and highly sensitive methane detection in environmental monitoring applications. Six different T-cell designs were both theoretically and experimentally investigated. The aim was to understand the photoacoustic signal generation and resonances in relation to the different cell geometries, and determine the long-term stability and the detection limits for methane. These were below the methane background concentration in air of 1.8 ppm.