Projects per year
Abstract
A new methodology for the development of miniature photoacoustic trace gas sensors using 3D printing is presented. A near-infrared distributed feedback (DFB) laser is used together with a polymer based gas cell, off the shelf fiber optic collimators and a microelectromechanical system (MEMS) microphone to measure acetylene at 1532.83nm. The resonance behavior of the miniature gas cell is analyzed using a theoretical and experimental approach, with a measured resonance frequency of 15.25kHz and a Q-factor of 15. A minimum normalized noise equivalent absorption of 4.5·10-9Wcm-1Hz-1/2 is shown together with a 3σ detection limit of 750 parts per billion (ppb) for signal averaging times of 35seconds. The fiber coupled delivery and miniature cost-effective cell design allows for use in multi-point and remote detection applications.
Original language | English |
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Pages (from-to) | 4796-4799 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 39 |
Issue number | 16 |
Early online date | 16 Jul 2014 |
DOIs | |
Publication status | Published - 8 Aug 2014 |
Keywords
- spectrometers
- measurement instumentation
- photoacoustic spectroscopy
- remote sensors
- remote sensing
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Dive into the research topics of 'A 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases'. Together they form a unique fingerprint.Profiles
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Walter Johnstone
- Electronic And Electrical Engineering - Visiting Professor
Person: Visiting Professor
Projects
- 1 Finished
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Development of a Micro-electromechanical Photoacoustic Spectrometer for Industrial Applications and the Study of SO2 at High Temperatures
Lengden, M. (Principal Investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/07/13 → 31/12/15
Project: Research
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All-optical fiber multi-point photoacoustic spectroscopic gas sensing system
Zhang, C., Yang, Y., Lin, Y., Tan, Y., Lengden, M., Humphries, G., Johnstone, W., Lut Ho, H. & Jin, W., 28 Sept 2018, Proceedings 26th International Conference on Optical Fiber Sensors. Washington, DC: Optical Society of America, 4 p.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
Open AccessFile35 Downloads (Pure) -
Trace gas sensing using DFB laser and QCL with miniaturized 3D-printed photoacoustic gas cells
Bauer, R., Flockhart, G. M. H., Johnstone, W. & Lengden, M., 8 Dec 2016, International Conference on Fibre Optics and Photonics 2016. Washington: Optical Society of America, 3 p. W4G.3Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
Open AccessFile95 Downloads (Pure) -
MIR photoacoustic trace gas sensing using a miniaturized 3D printed gas cell
Bauer, R. M., Wilson, D., Johnstone, W. & Lengden, M., Jul 2015.Research output: Contribution to conference › Presentation/Speech › peer-review