Projects per year
Abstract
This paper presents the development of a Raman fiber amplifier optical source with a maximum output power of 1.1 W centered around 1651 nm, and its application in miniaturized 3D printed photoacoustic spectroscopy (PAS) trace gas sensing of methane. The Raman amplifier has been constructed using 4.5 km of dispersion shifted fiber, a 1651 nm DFB seed laser and a commercial 4W EDFA pump. The suppression of stimulated Brillouin scattering (SBS) using a high frequency modulation of the seed laser is investigated for a range of frequencies, leading to an increase in optical output power of the amplifier and reduction of its noise content. The amplifier output was used as the source for a miniature PAS sensor by applying a second modulation to the seed laser at the resonant frequency of 15.2 kHz of the miniature 3D printed gas cell. For the targeted methane absorption line at 6057 cm-1 the sensor system performance and influence of the SBS suppression is characterized, leading to a detection limit (1σ) of 17 ppb methane for a signal acquisition time of 130 s, with a normalized noise equivalent absorption coefficient of 4.1•10-9 cm-1 W Hz-1/2 for the system.
Original language | English |
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Pages (from-to) | 3773-3780 |
Number of pages | 9 |
Journal | Journal of Lightwave Technology |
Volume | 33 |
Issue number | 18 |
Early online date | 10 Jun 2015 |
DOIs | |
Publication status | Published - 15 Sep 2015 |
Keywords
- miniaturized fiber optic sensor
- 3D printed photoacoustic trace gas sensor
- raman fiber amplifier system
- SBS suppression
Fingerprint Dive into the research topics of 'Miniaturized photoacoustic trace gas sensing using a raman fiber amplifier'. Together they form a unique fingerprint.
Profiles
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Ralf Bauer
- Electronic And Electrical Engineering - Senior Lecturer
- Health and Wellbeing
Person: Academic
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Michael Lengden
- Electronic And Electrical Engineering - Senior Lecturer
- Measurement Science and Enabling Technologies
Person: Academic
Projects
- 1 Finished
Datasets
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Photoacoustic trace gas measurements using a Raman Fibre Amplifier
Bauer, R. (Creator) & Lengden, M. (Data Manager), University of Strathclyde, 1 Jun 2016
DOI: 10.15129/584fdf9d-1860-4e4d-8b8d-a71a667466dd
Dataset
Research Output
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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 Sep 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 AccessFile -
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 AccessFile -
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 › Speech › peer-review