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...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-07-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/20/14/3967 |
| _version_ | 1797562297936248832 |
|---|---|
| author | Thomas Lauwers Alain Glière Skandar Basrour |
| author_facet | Thomas Lauwers Alain Glière Skandar Basrour |
| author_sort | Thomas Lauwers |
| collection | DOAJ |
| 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 <inline-formula> <math display="inline"> <semantics> <mrow> <mo>~</mo> <mo> </mo> <mn>2</mn> <mo> </mo> <mrow> <mi mathvariant="sans-serif">μ</mi> <mi>Pa</mi> </mrow> <mo>/</mo> <msqrt> <mrow> <mi>Hz</mi> </mrow> </msqrt> </mrow> </semantics> </math> </inline-formula> 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. |
| first_indexed | 2024-03-10T18:26:14Z |
| format | Article |
| id | doaj.art-f2cb3c8da2ed49c1b0b2ab5f82e3b276 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T18:26:14Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f2cb3c8da2ed49c1b0b2ab5f82e3b2762023-11-20T07:01:53ZengMDPI AGSensors1424-82202020-07-012014396710.3390/s20143967An all-Optical Photoacoustic Sensor for the Detection of Trace GasThomas Lauwers0Alain Glière1Skandar Basrour2Université Grenoble Alpes, CEA, LETI, F38000 Grenoble, FranceUniversité Grenoble Alpes, CEA, LETI, F38000 Grenoble, FranceUniversité Grenoble Alpes, CNRS, Grenoble INP, TIMA, 38000 Grenoble, FranceA 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 <inline-formula> <math display="inline"> <semantics> <mrow> <mo>~</mo> <mo> </mo> <mn>2</mn> <mo> </mo> <mrow> <mi mathvariant="sans-serif">μ</mi> <mi>Pa</mi> </mrow> <mo>/</mo> <msqrt> <mrow> <mi>Hz</mi> </mrow> </msqrt> </mrow> </semantics> </math> </inline-formula> 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.https://www.mdpi.com/1424-8220/20/14/3967Extrinsic Fabry-Perot interferometerphotoacoustic sensortrace gas sensorlumped modelall-optical sensorall-optical PA sensor |
| spellingShingle | Thomas Lauwers Alain Glière Skandar Basrour An all-Optical Photoacoustic Sensor for the Detection of Trace Gas Sensors Extrinsic Fabry-Perot interferometer photoacoustic sensor trace gas sensor lumped model all-optical sensor all-optical PA sensor |
| 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 | Extrinsic Fabry-Perot interferometer photoacoustic sensor trace gas sensor lumped model all-optical sensor all-optical PA sensor |
| url | https://www.mdpi.com/1424-8220/20/14/3967 |
| work_keys_str_mv | AT thomaslauwers anallopticalphotoacousticsensorforthedetectionoftracegas AT alaingliere anallopticalphotoacousticsensorforthedetectionoftracegas AT skandarbasrour anallopticalphotoacousticsensorforthedetectionoftracegas AT thomaslauwers allopticalphotoacousticsensorforthedetectionoftracegas AT alaingliere allopticalphotoacousticsensorforthedetectionoftracegas AT skandarbasrour allopticalphotoacousticsensorforthedetectionoftracegas |