| Title: | Gas sensing system based on an all-fiber photothermal microcell |
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| Authors: | ID Njegovec, Matej (Author)
ID Javornik, Jure (Author)
ID Pevec, Simon (Author)
ID Budinski, Vedran (Author)
ID Gregorec, Tomaž (Author)
ID Lang, Benjamin (Author)
ID Tanzer, Manuel (Author)
ID Bergmann, Alexander (Author)
ID Đonlagić, Denis (Author) |
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| Files: |  Gas_Sensing_System_Based_on_an_All-Fiber_Photothermal_Microcell.pdf (15,77 MB)
MD5: 9DC7BDF8647C5A43B6AB0F32A815A519
 https://ieeexplore.ieee.org/document/10520167
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FERI - Faculty of Electrical Engineering and Computer Science
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| Abstract: | This article presents an all-fiber, miniature Fabry-Perot gas sensor based on photothermal absorption spectroscopy with a custom-made and cost-efficient interrogation system. The sensing gas microcell has a diameter of 125 μ m and a length of 1 mm, and allows for free gas exchange within the optical resonator through micromachined slits. High light intensity and confinement are ensured by delivering the excitation light directly into the gas microcell through a lead-in single-mode fiber. This enhances the photothermal effect and provides a short system response time. The interrogation system utilizes the modulation of an excitation laser diode with a fixed frequency while locking the probe laser onto the gas microcell’s quadrature point (QP) and observing the variations of the reflected optical power. To show the potential of the proposed system, nitrogen dioxide (NO2 was measured in dry air. Thereby, a limit of detection of 20 ppm could be achieved for 10 s integration time. Furthermore, the small dimensions of the sensor allow for improved dynamic performance with photothermal modulation frequencies as high as 7 kHz. |
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| Keywords: | Fabry–Perot interferometer, FPI, fiber gas cell, fiber gas sensor, nitrogen dioxide, NO2, photothermal effect |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 22.02.2024 |
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| Article acceptance date: | 22.04.2024 |
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| Publication date: | 03.05.2024 |
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| Publisher: | IEEE XPLORE |
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| Year of publishing: | 2024 |
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| Number of pages: | str. 19125-19135 |
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| Numbering: | Vol. 24, no. 12 |
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| PID: | 20.500.12556/DKUM-90318  |
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| UDC: | 535 |
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| ISSN on article: | 1530-437X |
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| COBISS.SI-ID: | 199219459 |
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| DOI: | 10.1109/JSEN.2024.3394651 |
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| Copyright: | © 2024 The Authors |
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| Publication date in DKUM: | 29.08.2024 |
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| Views: | 269 |
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| Downloads: | 38 |
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| Metadata: |    |
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| Categories: | Misc.
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