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 (C2H2) 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 × 10−7 cm−1 at 8 s of integration time through a 1.4 m fiber.
Antiresonant hollow-core fiber-assisted differential optical absorption spectroscopy with ppb-level trace gas detection / Dudzik, G., Kulpa, M., Jaworski, P., Bojęś, P., Kozioł, P., Belardi, W., Krzempek, K.. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 33:23(2025), pp. 49810-49820. [10.1364/oe.579677]
Antiresonant hollow-core fiber-assisted differential optical absorption spectroscopy with ppb-level trace gas detection
Belardi, Walter;
2025-01-01
Abstract
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 (C2H2) 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 × 10−7 cm−1 at 8 s of integration time through a 1.4 m fiber.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
