Issue |
J. Eur. Opt. Society-Rapid Publ.
Volume 18, Number 1, 2022
EOSAM 2021
|
|
---|---|---|
Article Number | 7 | |
Number of page(s) | 10 | |
DOI | https://doi.org/10.1051/jeos/2022007 | |
Published online | 25 August 2022 |
Research Article
Optical characterization of strain sensing cables for Brillouin optical time domain analysis
1
Department of Industrial Engineering, University of Bologna, 47121 Forlì, Italy
2
Sestosensor SRL, R&D Department, Zola Predosa 40069, Italy
3
Fibrain Sp. Z.o.o., Wspólna 4A, Rzeszów 35-205, Poland
4
Consiglio Nazionale delle Ricerche, IMM Institute, Bologna 40129, Italy
* Corresponding author: bolognini@bo.imm.cnr.it
Received:
31
January
2022
Accepted:
28
July
2022
Two innovative optical fiber cable layouts designed to improve strain measurement accuracy for Brillouin Optical Time Domain Analysis (BOTDA) sensors through improved strain transfer efficiency are presented and discussed. Swept Wavelength Interferometry (SWI) is used to experimentally evaluate their performance alongside analytical models and numerical simulation through Finite Element Method (FEM). The results show good agreement between the different methods and show that the second sensing cable design presents good features to minimize the mismatch between measured and actual strain. Finally, the strain response of both strain and temperature sensing cables of this design are evaluated, showing that their difference in response is reliable enough to allow temperature compensation.
Key words: Brillouin scattering / Optical fiber sensors / Fiber ring lasers / Strain transfer / Structural health monitoring
© The Author(s), published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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