Antiresonant hollow core fiber-assisted differential absorption spectroscopy of gas molecules

Grzegorz Dudzik; Natalia Stalmach; Karol Krzempek; Piotr Jaworski; Paweł Kozioł; Walter Belardi

doi:10.1117/12.2594845

1 August 2021 Antiresonant hollow core fiber-assisted differential absorption spectroscopy of gas molecules

Grzegorz Dudzik, Natalia Stalmach, Karol Krzempek, Piotr Jaworski, Paweł Kozioł, Walter Belardi

Proceedings Volume 11826, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XV; 118260K (2021) https://doi.org/10.1117/12.2594845
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Conference Poster

Abstract

We present a proof-of-concept of the ARHCF-assisted gas molecules detection setup applying a non-wavelength modulation differential optical absorption spectroscopy (DOAS) technique to reduce an intermodal interferences effect and the compensation of changes in laser beam propagation parameters through ARHCF air-core. Toggled intensities of two air-core propagated laser beams have closely spaced wavelengths, while only one coinciding with targeted absorption line of acetylene at 1532.83 nm (~6524 cm-1). The difference in detected light intensities is used to determine a targeted gas concentration. Self-designed boxcar average unit allowed to 50 000 times/sec signals averaging, providing a minimal detection limit equal to 2.7 ppmv at 10s integration time.

Citation Download Citation

Grzegorz Dudzik, Natalia Stalmach, Karol Krzempek, Piotr Jaworski, Paweł Kozioł, and Walter Belardi "Antiresonant hollow core fiber-assisted differential absorption spectroscopy of gas molecules", Proc. SPIE 11826, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XV, 118260K (1 August 2021); https://doi.org/10.1117/12.2594845

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