Issue |
EPJ Web Conf.
Volume 287, 2023
EOS Annual Meeting (EOSAM 2023)
|
|
---|---|---|
Article Number | 09013 | |
Number of page(s) | 2 | |
Section | Topical Meeting (TOM) 9- Applications in Optics and Photonics | |
DOI | https://doi.org/10.1051/epjconf/202328709013 | |
Published online | 18 October 2023 |
https://doi.org/10.1051/epjconf/202328709013
Single-photon detector-based long-distance Brillouin optical time domain reflectometry
1 Femto-ST institute, CNRS UMR 6174, University of Franche-Comté, 15B avenue des Montboucons, 25000 Besançon, France
2 Omnisens SA, Riond-Bosson 3, 1110 Morges, Switzerland
3 Femto-ST institute, CNRS UMR 6174, Supmicrotech ENSMM, 15B avenue des Montboucons, 25000 Besançon, France
* Corresponding author: maxime.romanet@femto-st.fr
Published online: 18 October 2023
We present a long-range Brillouin optical time domain reflectometer (BOTDR) based on photon counting technology. We demonstrate experimentally the ability to perform a distributed temperature measurement, by detecting a hot spot in a thermal bath at 100 km, and the possibility to achieve measurement until 120 km with a spatial resolution of 10 m. We use the slope of a fiber Bragg grating (FBG) as a frequency discriminator, to convert count rate variation into a frequency shift. A performance study of our distributed sensor as a function of spatial resolution is also presented.
© The Authors, published by EDP Sciences, 2023
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