A Dual-Gas Sensor Using Photoacoustic Spectroscopy Based on a Single Acoustic Resonator
Open Access
- 4 June 2021
- journal article
- research article
- Published by MDPI AG in Applied Sciences
- Vol. 11 (11), 5224
- https://doi.org/10.3390/app11115224
Abstract
A dual-gas photoacoustic spectroscopy (PAS) sensor based on wavelength modulation spectroscopy (WMS) was developed and experimentally demonstrated. Distributed feedback (DFB) laser diodes, emitting at 1512 and 1653 nm, were utilized as the excitation sources for the simultaneous measurement of NH3 and CH4, respectively. The PAS signal was excited by modulating the DFB laser at the first longitudinal resonant frequency of a cylindrical acoustic resonator. Absorption lines for NH3 and CH4 were simultaneously recorded during one frequency scan of the DFB lasers without using any optical switch. The interference of NH3 and CH4 on each other was investigated for accurate detection. The limits of detection (LoDs) of the PAS sensor for NH3 and CH4 for an integration time of 100 s were determined to be 0.1 and 0.3 ppm, respectively. The present PAS sensor provides a new scheme for multi-gas analysis with the advantages of cost-effectiveness, a simple structure and multi-wavelength operation.Funding Information
- Key Research and Development Program of Zhejiang Province (2021C03178, 1141257B20200538, 11621101)
This publication has 35 references indexed in Scilit:
- Continuous monitoring of elemental mercury employing low-cost multimode diode lasersMeasurement Science and Technology, 2015
- Development and deployment of a cavity enhanced UV-LED spectrometer for measurements of atmospheric HONO and NO2 in Hong KongAtmospheric Environment, 2014
- Fiber-Enhanced Raman Multigas Spectroscopy: A Versatile Tool for Environmental Gas Sensing and Breath AnalysisAnalytical Chemistry, 2014
- QCL-based TDLAS sensor for detection of NO toward emission measurements from ovarian cancer cellsApplied Physics B Laser and Optics, 2014
- A Review of Signal Enhancement and Noise Reduction Techniques for Tunable Diode Laser Absorption SpectroscopyApplied Spectroscopy Reviews, 2014
- Measurement of the Boltzmann Constant k B Using a Quasi-Spherical Acoustic ResonatorInternational Journal of Thermophysics, 2011
- Progress in cantilever enhanced photoacoustic spectroscopyVibrational Spectroscopy, 2008
- Wavelength modulation photoacoustic spectroscopy: Theoretical description and experimental resultsInfrared Physics & Technology, 2006
- Sub-ppm multi-gas photoacoustic sensorSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2006
- Multi-gas sensing based on photoacoustic spectroscopy using tunable laser diodesSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2004