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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
