| Issue |
EPJ Web Conf.
Volume 309, 2024
EOS Annual Meeting (EOSAM 2024)
|
|
|---|---|---|
| Article Number | 12002 | |
| Number of page(s) | 2 | |
| Section | Focused Sessions (FS) 2- Optical Fibers Technology | |
| DOI | https://doi.org/10.1051/epjconf/202430912002 | |
| Published online | 31 October 2024 | |
https://doi.org/10.1051/epjconf/202430912002
All-Optical Self-Heated Sensing Platform for Water Content Monitoring in Soil
University of Sannio, Engineering Department, Optoelectronics Group, 82100, Benevento, Italy
* Corresponding author: acusano@unisannio.it; consales@unisannio.it
Published online: 31 October 2024
In this contribution, we propose the use of an advanced all-optical self-heated sensing platform for highly sensitive monitoring of the volumetric water content (VWC) in the soil. The sensor is realized by properly integrating, inside a standard metallic needle, a fiber optic heating device based on core offset light coupling method and a Fiber Bragg Grating (FBG) acting as thermal monitor. The performance of the proposed device was validated through a series of measurements in the range [9 - 36] %VWC in the soil temperature range between 5 and 40 °C. Collected results have demonstrated that the presented platform is able to perform highly stable, fast and robust measurements, with time response lower than 10 seconds. The possibility of tuning the value of the injected power according to the application makes the proposed sensing solution extremely flexible and versatile for its exploitation in large areas and/or long-distance.
© The Authors, published by EDP Sciences, 2024
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.
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