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4 - Photoacoustic Spectroscopy with DFB Sources

Published online by Cambridge University Press:  07 April 2021

George Stewart
George Stewart
Affiliation:
University of Strathclyde
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Summary

The principles of photoacoustic spectroscopy and the acoustic wave equation are introduced for describing the acoustic waves generated from a modulated heat source. Acoustic resonant cells for signal enhancement are considered in detail with a full mathematical description of the resonant modes. Analytical expressions are derived for the amplitude of the acoustic modes generated by excitation of a gas with a modulated DFB laser, describing the coupling of the harmonics from the wavelength and intensity modulation to the acoustic modes.Conditions for the selective excitation of longitudinal, azimuthal and radial modes by the laser beam are explained in relation to the overlap factor between the acoustic mode profile and the beam profile.Expressions are given for the Q-factor of the cell and how cell dimensions may be chosen to optimise the performance. Calibration and sensitivity issues are discussed with examples given of typical photoacoustic cells in bulk or miniaturised form and the expected signal output at the microphone. The technique of quartz-enhanced photoacoustic spectroscopy (QEPAS) is also briefly reviewed as an alternative to the use of photoacoustic cells.

Keywords

Photoacoustic spectroscopyacoustic resonatorQ-factorharmonic couplingoverlap factorlongitudinal modeazimuthal moderadial modeminiaturized cellquartz-enhanced
Type
Chapter
Information
Laser and Fiber Optic Gas Absorption Spectroscopy , pp. 85 - 110
Publisher: Cambridge University Press
Print publication year: 2021

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References

Besson, J.-P., Schilt, S. and Thevenaz, L., Multi-gas sensing based on photoacoustic spectroscopy using tunable diode lasers, Spectrochim. Acta A, 60, 3449–3456, 2004.Google Scholar
Schilt, S. and Thevenaz, L., Wavelength modulation photoacoustic spectroscopy: theoretical description and experimental results, Infrared Phys. Techn., 48, 154–162, 2006.CrossRefGoogle Scholar
Kreuzer, L.B., The physics of signal generation and detection in Optoacoustic Spectroscopy and Detection, Pao, Y.-H., Ed., New York, Academic Press, ch. 1, 1977.Google Scholar
Miklos, A. and Hess, P., Application of acoustic resonators in photoacoustic trace gas analysis and metrology, Rev Sci Instrum., 24, (4), 1937–1955, 2001.CrossRefGoogle Scholar
Schafer, S., Miklos, A. and Hess, P., Quantitative signal analysis in pulsed resonant photoacoustics, Appl. Opt., 36, (15), 3202–3211, 1997.CrossRefGoogle ScholarPubMed
Li, J., Gao, X., Li, W., et al., Near-infrared diode laser wavelength modulation-based photoacoustic spectrometer, Spectrochim. Acta A, 64, 338–342, 2006.Google Scholar
Kinsler, L. E., Frey, A. R., Coppens, A. B., Sanders, J. V., Pipes, resonators and filters in Fundamentals of Acoustics, New York, John Wiley & Sons Inc., ch. 10, 2000.Google Scholar
Bijnen, F. G. C., Reuss, J. and Harren, F. J. M., Geometrical optimization of a longitudinal resonant photoacoustic cell for sensitive and fast trace gas detection, Rev. Sci. Instrum., 67, (8), 2914–2923, 1996.Google Scholar
Tavakoli, M., Tavakoli, A., Taheri, M. and Saghafifar, H., Design, simulation and structural optimization of a longitudinal acoustic resonator for trace gas detection using laser photoacoustic spectroscopy, Opt. Laser Technol., 42, (5), 828–838, 2009.Google Scholar
Holthoff, E. L., Heaps, D. A. and Pellegrino, P. M., Development of a MEMS-scale photoacoustic chemical sensor using a quantum cascade laser, IEEE Sens. J., 10, (3), 572–577, 2010.CrossRefGoogle Scholar
Bauer, R., Stewart, G., Johnstone, W., Boyd, E. and Lengden, M., A 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases, Opt. Lett., 39, (16), 4796–4799, 2014.Google Scholar
Bauer, R., Legg, T., Mitchell, D., et al., Miniaturized photoacoustic trace gas sensing using a Raman fiber amplifier, IEEE J. Lightwave Technol., 33, (18), 3773–3780, 2015.Google Scholar
Karbach, A. and Hess, P., High precision acoustic spectroscopy by laser excitation of resonator modes, J. Chem. Phys., 83, (3), 1075–1084, 1985.CrossRefGoogle Scholar
Schilt, S., Thevenaz, L., Nikles, M, Emmenegger, L. and Huglin, C., Ammonia monitoring at trace level using photoacoustic spectroscopy in industrial and environmental applications, Spectrochim. Acta A, 60, 3259–3268, 2004.Google Scholar
Hao, L.-Y., Han, J.-X., Shi, Q., et al., A highly sensitive photoacoustic spectrometer for near infrared overtone, Rev. Sci. Instrum., 71, (5), 2000.CrossRefGoogle Scholar
Rosenheinrich, W., Tables of some indefinite integrals of Bessel functions of integer order, 2019. [Online]. Available: http://web.eah-jena.de/~rsh/Forschung/Stoer/besint.pdf (accessed April 2020)Google Scholar
Culham, J. R., Bessel functions of the first and second kind, 2004. [Online]. Available: www.mhtlab.uwaterloo.ca/courses/me755/web_chap4.pdf (accessed April 2020)Google Scholar
Comsol Inc, COMSOL Multiphysics, 2019. [Online]. Available: www.comsol.com/products (accessed April 2020)Google Scholar
Haisch, C., Photoacoustic spectroscopy for analytical measurements, Meas. Sci. Technol., 23, 1–16, 2012.Google Scholar
www.analog.com/en/analog-dialogue/articles/understanding-microphone-sensitivity.html (accessed April 2020)Google Scholar
Li, L., Arsad, N., Stewart, G., et al., Absorption line profile recovery based on residual amplitude modulation and first harmonic integration methods in photoacoustic gas sensing, Opt. Comm., 284, (1), 312–316, 2011.CrossRefGoogle Scholar
Cirrus Logic, Inc., 2019. Analog MEMS microphones [Online]. Available: https://www.cirrus.com/products/ (accessed April 2020)Google Scholar
Patimisco, P., Sampaolo, A., Dong, L. and Tittel, F. K., Recent advances in quartz enhanced photoacoustic spectroscopy, Appl. Phys. Rev., 5, (011106), 1–20, 2018.CrossRefGoogle Scholar
Patimisco, P., Scamarcio, G., Tittel, F. K. and Spagnolo, V., Quartz-enhanced photoacoustic spectroscopy: a review, Sensors, 14, 6165–6206, 2014.Google Scholar
Li, Z., Wang, Z., Qi, Y., Jin, W. and Ren, W., Improved evanescent-wave quartz-enhanced photoacoustic CO sensor using an optical fiber taper, Sens. Actuators B: Chem., 248, 1023–1028, 2017.Google Scholar

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