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An all-Optical Photoacoustic Sensor for the Detection of Trace Gas
A highly sensitive Fabry–Perot based transduction method is proposed as an all-optical alternative for the detection of trace gas by the photoacoustic spectroscopy technique. A lumped element model is firstly devised to help design the whole system and is successfully compared to finite element meth...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7411696/ https://www.ncbi.nlm.nih.gov/pubmed/32708834 http://dx.doi.org/10.3390/s20143967 |
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author | Lauwers, Thomas Glière, Alain Basrour, Skandar |
author_facet | Lauwers, Thomas Glière, Alain Basrour, Skandar |
author_sort | Lauwers, Thomas |
collection | PubMed |
description | A highly sensitive Fabry–Perot based transduction method is proposed as an all-optical alternative for the detection of trace gas by the photoacoustic spectroscopy technique. A lumped element model is firstly devised to help design the whole system and is successfully compared to finite element method simulations. The fabricated Fabry–Perot microphone consists in a hinged cantilever based diaphragm, processed by laser cutting, and directly assembled at the tip of an optical fiber. We find a high acoustic sensitivity of 630 mV/Pa and a state-of-the-art noise equivalent pressure, as low as [Formula: see text] at resonance. For photoacoustic trace gas detection, the Fabry–Perot microphone is further embedded in a cylindrical multipass cell and shows an ultimate detection limit of 15 ppb of NO in nitrogen. The proposed optical trace gas sensor offers the advantages of high sensitivity and easy assembling, as well as the possibility of remote detection. |
format | Online Article Text |
id | pubmed-7411696 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-74116962020-08-25 An all-Optical Photoacoustic Sensor for the Detection of Trace Gas Lauwers, Thomas Glière, Alain Basrour, Skandar Sensors (Basel) Article A highly sensitive Fabry–Perot based transduction method is proposed as an all-optical alternative for the detection of trace gas by the photoacoustic spectroscopy technique. A lumped element model is firstly devised to help design the whole system and is successfully compared to finite element method simulations. The fabricated Fabry–Perot microphone consists in a hinged cantilever based diaphragm, processed by laser cutting, and directly assembled at the tip of an optical fiber. We find a high acoustic sensitivity of 630 mV/Pa and a state-of-the-art noise equivalent pressure, as low as [Formula: see text] at resonance. For photoacoustic trace gas detection, the Fabry–Perot microphone is further embedded in a cylindrical multipass cell and shows an ultimate detection limit of 15 ppb of NO in nitrogen. The proposed optical trace gas sensor offers the advantages of high sensitivity and easy assembling, as well as the possibility of remote detection. MDPI 2020-07-16 /pmc/articles/PMC7411696/ /pubmed/32708834 http://dx.doi.org/10.3390/s20143967 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lauwers, Thomas Glière, Alain Basrour, Skandar An all-Optical Photoacoustic Sensor for the Detection of Trace Gas |
title | An all-Optical Photoacoustic Sensor for the Detection of Trace Gas |
title_full | An all-Optical Photoacoustic Sensor for the Detection of Trace Gas |
title_fullStr | An all-Optical Photoacoustic Sensor for the Detection of Trace Gas |
title_full_unstemmed | An all-Optical Photoacoustic Sensor for the Detection of Trace Gas |
title_short | An all-Optical Photoacoustic Sensor for the Detection of Trace Gas |
title_sort | all-optical photoacoustic sensor for the detection of trace gas |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7411696/ https://www.ncbi.nlm.nih.gov/pubmed/32708834 http://dx.doi.org/10.3390/s20143967 |
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