Abstract
In this work, we present for the first time a laser-based dual gas sensor utilizing a silica-based Antiresonant Hollow-Core Fiber (ARHCF) operating in the Near-and Mid-Infrared spectral region. A 1-m-long fiber with an 84-µm diameter air-core was implemented as a low-volume absorption cell in a sensor configuration utilizing the simple and well-known Wavelength Modulation Spectroscopy (WMS) method. The fiber was filled with a mixture of methane (CH4) and carbon dioxide (CO2), and a simultaneous detection of both gases was demonstrated targeting their transitions at 3.334 µm and 1.574 µm, respectively. Due to excellent guidance properties of the fiber and low background noise, the proposed sensor reached a detection limit down to 24 parts-per-billion by volume for CH4 and 144 parts-per-million by volume for CO2. The obtained results confirm the suitability of ARHCF for efficient use in gas sensing applications for over a broad spectral range. Thanks to the demonstrated low loss, such fibers with lengths of over one meter can be used for increasing the laser-gas molecules interaction path, substituting bulk optics-based multipass cells, while delivering required flexibility, compactness, reliability and enhancement in the sensor’s sensitivity.
Original language | English |
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Article number | 3813 |
Pages (from-to) | 1-12 |
Number of pages | 12 |
Journal | Sensors (Switzerland) |
Volume | 20 |
Issue number | 14 |
DOIs | |
Publication status | Published - 8 Jul 2020 |
Funding
Funding: This research was funded by Narodowe Centrum Nauki (NCN), grant number UMO-2018/30/Q/ ST3/00809, the Polish National Agency for Academic Exchange, grant number PPI/APM/2018/1/00031/U/001, National Natural Science Foundation of China (NSFC), grant number 61961136003. The Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS), grant number ZDBS-LY-JSC020, The Pioneer Hundred Talents Program of CAS. The APC was funded by the Polish National Agency for Academic Exchange, grant number PPI/APM/2018/1/00031/U/001.
Keywords
- Antiresonant hollow core fibers
- Fiber gas sensors
- Fiber optics
- Laser spectroscopy
- Microstructured fibers
- Wavelength modulation spectroscopy
ASJC Scopus subject areas
- Analytical Chemistry
- Biochemistry
- Atomic and Molecular Physics, and Optics
- Instrumentation
- Electrical and Electronic Engineering