Trace gas detection in a hollow-core antiresonant fiber with heterodyne phase-sensitive dispersion spectroscopy
Trace gas detection in a hollow-core antiresonant fiber with heterodyne phase-sensitive dispersion spectroscopy
Laser dispersion spectroscopy provides an attractive way of gas sensing by measuring refractive index rather than absorption. The previous dispersion gas sensors were mostly developed with free-space optics. In this work, we demonstrated heterodyne phase-sensitive dispersion spectroscopy (HPSDS) for sensitive nitric oxide (NO) detection in a hollow-core fiber to take advantage of the enhanced light-gas interaction in a compact setup. A quantum cascade laser (QCL) at 5.26 µm was coupled into a 35 cm tellurite hollow-core antiresonant fiber to exploit the strong absorption line of NO. The injection current of the QCL was modulated at 1 GHz to generate the three-tone beam for dispersion measurements. We achieved a noise equivalent concentration (NEC) of 0.8 ppm at the measurement time of 80 s. A comparative study of HPSDS with wavelength modulation spectroscopy (WMS) was also conducted to evaluate these two methods in terms of sensitivity and dynamic range.
Heterodyne phase-sensitive dispersion spectroscopy, Hollow-core antiresonant fiber, Optical gas sensor
Hu, Mengyuan
0114b993-3066-4817-894a-2c2f9db82e41
Ventura, Andrea
1a756848-b96c-48e2-bec9-57ba38a8256d
Hayashi, Juliano Grigoleto
fe6db15b-ec75-4fd1-94f9-66efb217db21
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Yao, Shunchun
565c7993-b0b0-4ac7-b431-f5449e2eebc5
Ren, Wei
3e97a9f7-5a31-4d68-8ec6-734f257cc684
6 April 2022
Hu, Mengyuan
0114b993-3066-4817-894a-2c2f9db82e41
Ventura, Andrea
1a756848-b96c-48e2-bec9-57ba38a8256d
Hayashi, Juliano Grigoleto
fe6db15b-ec75-4fd1-94f9-66efb217db21
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Yao, Shunchun
565c7993-b0b0-4ac7-b431-f5449e2eebc5
Ren, Wei
3e97a9f7-5a31-4d68-8ec6-734f257cc684
Hu, Mengyuan, Ventura, Andrea, Hayashi, Juliano Grigoleto, Poletti, Francesco, Yao, Shunchun and Ren, Wei
(2022)
Trace gas detection in a hollow-core antiresonant fiber with heterodyne phase-sensitive dispersion spectroscopy.
Sensors and Actuators B: Chemical, 363, [131774].
(doi:10.1016/j.snb.2022.131774).
Abstract
Laser dispersion spectroscopy provides an attractive way of gas sensing by measuring refractive index rather than absorption. The previous dispersion gas sensors were mostly developed with free-space optics. In this work, we demonstrated heterodyne phase-sensitive dispersion spectroscopy (HPSDS) for sensitive nitric oxide (NO) detection in a hollow-core fiber to take advantage of the enhanced light-gas interaction in a compact setup. A quantum cascade laser (QCL) at 5.26 µm was coupled into a 35 cm tellurite hollow-core antiresonant fiber to exploit the strong absorption line of NO. The injection current of the QCL was modulated at 1 GHz to generate the three-tone beam for dispersion measurements. We achieved a noise equivalent concentration (NEC) of 0.8 ppm at the measurement time of 80 s. A comparative study of HPSDS with wavelength modulation spectroscopy (WMS) was also conducted to evaluate these two methods in terms of sensitivity and dynamic range.
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More information
Accepted/In Press date: 22 March 2022
e-pub ahead of print date: 25 March 2022
Published date: 6 April 2022
Additional Information:
Funding Information:
We would like to acknowledge funding support from Guangdong Basic and Applied Basic Research Foundation ( 2020A0505090010 ), Shenzhen Science and Technology Innovation Committee ( 2021Szvup149 ), and Ministry of Science and Technology ( 2019YFE0109700 ), China; Innovation and Technology Commission ( MHP/049/19 ), and Research Grants Council ( 14209220 ), Hong Kong SAR, China .
Francesco Poletti received the Laurea degree in Electronics Engineering from the University of Parma, Parma, Italy, in 2000 and the Ph.D. degree from the Optoelectronics Research Centre (ORC), Southampton, U.K., in 2007. He is currently a Professor with ORC. He has worked for three years on optical network design with Marconi Communications and for more than ten years on the development of new generations of microstructured optical fibers with the ORC. He has coauthored more than 80 journal and 200 conference publications, and produced four patents. His research interests include the design of photonic bandgap and antiresonant fibers, the development of fiber-optic characterization techniques, and the fabrication of nonsilica-based fibers and devices. He is the holder of a European Research Fellowship Consolidator Grant.
Keywords:
Heterodyne phase-sensitive dispersion spectroscopy, Hollow-core antiresonant fiber, Optical gas sensor
Identifiers
Local EPrints ID: 481474
URI: http://eprints.soton.ac.uk/id/eprint/481474
ISSN: 0925-4005
PURE UUID: e74f0868-1891-4393-a0ee-997ef13fd67e
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Date deposited: 29 Aug 2023 17:19
Last modified: 18 Mar 2024 03:06
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Contributors
Author:
Mengyuan Hu
Author:
Andrea Ventura
Author:
Juliano Grigoleto Hayashi
Author:
Shunchun Yao
Author:
Wei Ren
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