Mid-infrared frequency modulation spectroscopy of NO detection in a hollow-core antiresonant fiber
Mid-infrared frequency modulation spectroscopy of NO detection in a hollow-core antiresonant fiber
Mid-infrared frequency modulation spectroscopy (FMS) in a tellurite hollow-core antiresonant fiber (HC-ARF) is investigated for gas detection. The spectroscopic system is demonstrated for nitric oxide (NO) detection by exploiting its strong absorption line at 1900.08 cm−1 with a quantum cascade laser (QCL). By modulating the injection current of the QCL at 250 MHz and measuring NO in a 35 cm long HC-ARF, we achieve a noise equivalent concentration of 67 ppb at an averaging time of 0.1 s. Compared to direct absorption spectroscopy with a low-pass filter for etalon noise reduction, the FMS technique shows an improvement factor of 22. The detection limit of FMS can be further improved to 6 ppb at a longer averaging time of 100 s, corresponding to a noise equivalent absorption coefficient of 1.0 × 10−7 cm−1.
frequency modulation spectroscopy, gas sensing, hollow-core antiresonant fiber, mid-infrared
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
Ren, Wei
3e97a9f7-5a31-4d68-8ec6-734f257cc684
3 December 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
Ren, Wei
3e97a9f7-5a31-4d68-8ec6-734f257cc684
Hu, Mengyuan, Ventura, Andrea, Hayashi, Juliano Grigoleto, Poletti, Francesco and Ren, Wei
(2022)
Mid-infrared frequency modulation spectroscopy of NO detection in a hollow-core antiresonant fiber.
Photonics, 9 (12), [935].
(doi:10.3390/photonics9120935).
Abstract
Mid-infrared frequency modulation spectroscopy (FMS) in a tellurite hollow-core antiresonant fiber (HC-ARF) is investigated for gas detection. The spectroscopic system is demonstrated for nitric oxide (NO) detection by exploiting its strong absorption line at 1900.08 cm−1 with a quantum cascade laser (QCL). By modulating the injection current of the QCL at 250 MHz and measuring NO in a 35 cm long HC-ARF, we achieve a noise equivalent concentration of 67 ppb at an averaging time of 0.1 s. Compared to direct absorption spectroscopy with a low-pass filter for etalon noise reduction, the FMS technique shows an improvement factor of 22. The detection limit of FMS can be further improved to 6 ppb at a longer averaging time of 100 s, corresponding to a noise equivalent absorption coefficient of 1.0 × 10−7 cm−1.
Text
photonics-09-00935-v2
- Version of Record
More information
Accepted/In Press date: 1 December 2022
Published date: 3 December 2022
Additional Information:
Funding Information:
This research was funded by General Research Fund (14208221, 14209220) of Research Grants Council (RGC) of Hong Kong SAR, China.
Keywords:
frequency modulation spectroscopy, gas sensing, hollow-core antiresonant fiber, mid-infrared
Identifiers
Local EPrints ID: 481813
URI: http://eprints.soton.ac.uk/id/eprint/481813
ISSN: 2304-6732
PURE UUID: 06bf773d-27cd-41bb-b012-2596bc46cc86
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Date deposited: 08 Sep 2023 16:45
Last modified: 18 Mar 2024 03:06
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Contributors
Author:
Mengyuan Hu
Author:
Andrea Ventura
Author:
Juliano Grigoleto Hayashi
Author:
Wei Ren
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