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Highly sensitive methane detection based on light-induced thermoelastic spectroscopy with a 2.33 µm diode laser and adaptive Savitzky-Golay filtering
Open accessAbstract
In this manuscript, a highly sensitive methane (CH 4 ) sensor based on light-induced thermoelastic spectroscopy (LITES) using a 2.33 µm diode laser with high power is demonstrated for the first time. A quartz tuning fork (QTF) with an intrinsic resonance frequency of 32.768 kHz was used to detect the light-induced thermoelastic signal. A Herriot multi-pass cell with an effective optical path of 10 m was adopted to increase the laser absorption. The laser wavelength modulation depth and concentration response of this CH 4 -LITES sensor were investigated. The sensor showed excellent long term stability when Allan deviation analysis was performed. An adaptive Savitzky-Golay (S-G) filtering algorithm with χ 2 statistical criterion was firstly introduced to the LITES technique. The SNR of this CH 4 -LITES sensor was improved by a factor of 2.35 and the minimum detection limit (MDL) with an integration time of 0.1 s was optimized to 0.5 ppm. This reported CH 4 -LITES sensor with sub ppm-level detection ability is of great value in applications such as environmental monitoring and industrial safety.
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“flammable and explosive gases, such as H2 and CH4, pose a direct threat to the safety of human life and property”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [13]
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Cited by
Sorted by citations
Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors.
Luo, Y., Li, J., Ding, Q., Wang, H., Liu, C., & Wu, J. (2023) · Nano-Micro Letters · doi:10.1007/s40820-023-01109-2 · Cited by 236
Metadata
- Authors
- Liu, X., Qiao, S., & Ma, Y.
- Affiliations
- Harbin Institute of Technology (CN)
- Venue
- Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2022-01-04
- Volume
- 30
- Issue
- 2
- Pages
- 1304
- ISSN
- 1094-4087 (ISSN-L)
- OpenAlex
- W4200142333
- Cited by
- 97
- References
- 0
- Citations by year
- 2026: 8 · 2025: 9 · 2024: 13 · 2023: 11 · 2022: 56
- FWCI
- 7.30
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Optics Express (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (61505041, 61875047, 62022032)
- Natural Science Foundation of Heilongjiang Province (YQ2019F006)
- Fundamental Research Funds for the Central Universities
- Heilongjiang Provincial Postdoctoral Science Foundation (LBH-Q18052)
- Topics
- Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
- Physical Sciences › Engineering › Mechanics of Materials › Thermography and Photoacoustic Techniques
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Fiber Optic Sensors
- Keywords
- methane detection, light-induced thermoelastic spectroscopy, quartz tuning fork, detection limit, Allan deviation, signal-to-noise ratio, laser absorption spectroscopy, gas sensors
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