Enhancing sensitivity in tuning fork photoacoustic spectroscopy systems

A fast, high-sensitivity detector is required for studies of environmentally relevant gases. Photoacoustic spectroscopy (PAS), an absorption spectroscopy technique in which absorption is detected as sound, is explored as a possible solution. A tuning-fork based PAS sensor is modeled using COMSOL Mul...

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Main Authors: Firebaugh, S.L., Roignant, F., Terray, E.A.
Format: Conference Proceeding
Language:English
Subjects:
Acoustic sensors
Acoustic signal detection
finite-element modeling
Gases
Laser tuning
Optical modulation
Optical resonators
photoacoustic spectroscopy
piezoelectric sensor
Resonance
Sea measurements
Spectroscopy
trace gas measurement
tuning fork
Vibrations
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creator Firebaugh, S.L.
Roignant, F.
Terray, E.A.
description A fast, high-sensitivity detector is required for studies of environmentally relevant gases. Photoacoustic spectroscopy (PAS), an absorption spectroscopy technique in which absorption is detected as sound, is explored as a possible solution. A tuning-fork based PAS sensor is modeled using COMSOL Multiphysics. The model combines the acoustic and piezoelectric modules and also includes viscous damping. The model is validated by comparison to experimental data. Acoustic resonator tubes have been found to enhance the signal in these systems. Here the model is applied to determine the dependence of the signal on resonator tube dimensions.
doi_str_mv 10.1109/SAS.2010.5439407
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Acoustic sensors
Acoustic signal detection
finite-element modeling
Gases
Laser tuning
Optical modulation
Optical resonators
photoacoustic spectroscopy
piezoelectric sensor
Resonance
Sea measurements
Spectroscopy
trace gas measurement
tuning fork
Vibrations
title Enhancing sensitivity in tuning fork photoacoustic spectroscopy systems
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