Tellurite hollow-core antiresonant fiber-coupled quantum cascade laser absorption spectroscopy
Tellurite hollow-core antiresonant fiber-coupled quantum cascade laser absorption spectroscopy
Mid-infrared absorption spectroscopy for gas detection is reported in this study using a quantum cascade laser (QCL) coupled with a custom-made tellurite hollow-core antiresonant fiber (HC-ARF). The HC-ARF is fabricated from tellurite glass by extrusion and subsequent fiber drawing. The QCL emitting at 5.26 μm is coupled into the 21-cm long HC-ARF. As a proof-of-concept, this spectroscopic system is demonstrated for nitric oxide (NO) detection by exploiting its strong absorption line at 1900.08 cm-1. By quickly filling gas mixtures into the HC-ARF, we first conduct direct absorption spectroscopy of NO and achieve a noise equivalent absorption (NEA) of 2.1 × 10-5 cm-1. Besides, we also conduct wavelength modulation spectroscopy to improve sensing performance. A minimum detection limit of 6 ppb NO is achieved at the integration time of 30 s, corresponding to 1.0 × 10-7 cm-1 in NEA. The HC-ARF is tested to show a response time of only 0.3 s when applying a pressure difference of 11 kPa between the two fiber ends. Such a tellurite HC-ARF-coupled QCL spectroscopic system makes it attractive for developing optical gas sensors with compact size, fast response, and high sensitivity.
Absorption spectroscopy, gas sensor, hollow-core antiresonant fiber, mid-infrared, tellurite
5662-5668
Yao, Chenyu
f2cebb0e-cce4-4a58-b8bf-40ffc73f736e
Hu, Mengyuan
0114b993-3066-4817-894a-2c2f9db82e41
Ventura, Andrea
9da53cd5-53b3-4009-9147-7bc46672002c
Hayashi, Juliano Grigoleto
fe6db15b-ec75-4fd1-94f9-66efb217db21
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Ren, Wei
3e97a9f7-5a31-4d68-8ec6-734f257cc684
1 September 2021
Yao, Chenyu
f2cebb0e-cce4-4a58-b8bf-40ffc73f736e
Hu, Mengyuan
0114b993-3066-4817-894a-2c2f9db82e41
Ventura, Andrea
9da53cd5-53b3-4009-9147-7bc46672002c
Hayashi, Juliano Grigoleto
fe6db15b-ec75-4fd1-94f9-66efb217db21
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Ren, Wei
3e97a9f7-5a31-4d68-8ec6-734f257cc684
Yao, Chenyu, Hu, Mengyuan, Ventura, Andrea, Hayashi, Juliano Grigoleto, Poletti, Francesco and Ren, Wei
(2021)
Tellurite hollow-core antiresonant fiber-coupled quantum cascade laser absorption spectroscopy.
Journal of Lightwave Technology, 39 (17), .
(doi:10.1109/JLT.2021.3088140).
Abstract
Mid-infrared absorption spectroscopy for gas detection is reported in this study using a quantum cascade laser (QCL) coupled with a custom-made tellurite hollow-core antiresonant fiber (HC-ARF). The HC-ARF is fabricated from tellurite glass by extrusion and subsequent fiber drawing. The QCL emitting at 5.26 μm is coupled into the 21-cm long HC-ARF. As a proof-of-concept, this spectroscopic system is demonstrated for nitric oxide (NO) detection by exploiting its strong absorption line at 1900.08 cm-1. By quickly filling gas mixtures into the HC-ARF, we first conduct direct absorption spectroscopy of NO and achieve a noise equivalent absorption (NEA) of 2.1 × 10-5 cm-1. Besides, we also conduct wavelength modulation spectroscopy to improve sensing performance. A minimum detection limit of 6 ppb NO is achieved at the integration time of 30 s, corresponding to 1.0 × 10-7 cm-1 in NEA. The HC-ARF is tested to show a response time of only 0.3 s when applying a pressure difference of 11 kPa between the two fiber ends. Such a tellurite HC-ARF-coupled QCL spectroscopic system makes it attractive for developing optical gas sensors with compact size, fast response, and high sensitivity.
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Tellurite_Hollow-Core_Antiresonant_Fiber-Coupled_Quantum_Cascade_Laser_Absorption_Spectroscopy
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e-pub ahead of print date: 11 June 2021
Published date: 1 September 2021
Additional Information:
Funding Information: Manuscript received March 17, 2021; revised June 4, 2021; accepted June 5, 2021. Date of publication June 11, 2021; date of current version September 13, 2021. This work was supported in part by the Natural Science Foundation of Guangdong Province, China under Grant 2019A1515011372, in part by the General Research Fund from the University Grants Committee under Grant 14209220, in part by the Innovation and Technology Fund of Hong Kong SAR, China under Grant ITS/242/19, in part by the project Lightpipe from the European Research Council under Grant 682724, in part by the EPSRC Airguide Photonics Programme under Grant EP/P030181/1, and in part by the Royal Society through Newton International Fellowship under Grant NF170629. (Chenyu Yao and Mengyuan Hu contributed equally to this work.) (Corresponding authors: Wei Ren; Juliano Grigoleto Hayashi.) Chenyu Yao, Mengyuan Hu, and Wei Ren are with the Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Hong Kong, China (e-mail: cyyao@mae.cuhk.edu.hk; myhu@mae.cuhk.edu.hk; ren-wei@mae.cuhk.edu.hk).
Keywords:
Absorption spectroscopy, gas sensor, hollow-core antiresonant fiber, mid-infrared, tellurite
Identifiers
Local EPrints ID: 473842
URI: http://eprints.soton.ac.uk/id/eprint/473842
ISSN: 0733-8724
PURE UUID: bdf10b3f-ac74-4939-a964-0f0b54187a4f
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Date deposited: 01 Feb 2023 17:42
Last modified: 18 Mar 2024 03:06
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Author:
Chenyu Yao
Author:
Mengyuan Hu
Author:
Andrea Ventura
Author:
Juliano Grigoleto Hayashi
Author:
Wei Ren
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