Antiresonant hollow-core fiber-assisted differential optical absorption spectroscopy with ppb-level trace gas detection
Herein, an antiresonant hollow-core fiber-based trace gas detection utilizing differential optical absorption spectroscopy (DOAS) is reported for the first time. The applied non-wavelength modulation combined with time division multiplexing (TDM) techniques reducing intermodal interference and, hence, mode-coupling noise in hollow-core fibres. Proof-of-concept experiments aimed at acetylene (C<sub>2</sub>H<sub>2</sub>) detection at 1532.83 nm were successfully performed, yielding a minimum detection limit of 840 ppbv and a noise equivalent absorption coefficient of 4.84 × 10<sup>-7 </sup>cm<sup>-1</sup> at 8 s of integration time through a 1.4 m fiber.
Authors
- Maciej Kulpa (ORCID: https://orcid.org/0000-0002-8550-7382)
- Walter Belardi (ORCID: https://orcid.org/0000-0001-6302-8607)
- Grzegorz Dudzik (ORCID: https://orcid.org/0000-0003-0495-4285)
- Karol Krzempek
- Paweł Kozioł (ORCID: https://orcid.org/0000-0002-5203-8735)
- Piotr Bojęś
- Piotr Jaworski (ORCID: https://orcid.org/0000-0003-4476-5577)
Institutions
- Laboratoire de Physique des Lasers, Atomes et Molécules (FR)
Publication Details
- Journal
- Optics Express
- Published
- 2025-11-07
- DOI
- https://doi.org/10.1364/oe.579677
- Primary Topic
- Spectroscopy and Laser Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00