• Journal of the European Optical Society-Rapid Publications
  • Vol. 18, Issue 1, 2022007 (2022)
Francesco Falcetelli1, Filippo Bastianini2, Pawel Bocheński3, Leonardo Rossi4, Raffaella Di Sante1, and Gabriele Bolognini4、*
Author Affiliations
  • 1Department of Industrial Engineering, University of Bologna, 47121 Forlì, Italy
  • 2Sestosensor SRL, R&D Department, Zola Predosa 40069, Italy
  • 3Fibrain Sp. Z.o.o., Wspólna 4A, Rzeszów 35-205, Poland
  • 4Consiglio Nazionale delle Ricerche, IMM Institute, Bologna 40129, Italy
  • show less
    DOI: 10.1051/jeos/2022007 Cite this Article
    Francesco Falcetelli, Filippo Bastianini, Pawel Bocheński, Leonardo Rossi, Raffaella Di Sante, Gabriele Bolognini. Optical characterization of strain sensing cables for Brillouin optical time domain analysis[J]. Journal of the European Optical Society-Rapid Publications, 2022, 18(1): 2022007 Copy Citation Text show less

    Abstract

    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.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.
    λR=2neffΛAVG.

    View in Article

    λRλR=-νRνR=Kεε+KTT,

    View in Article

    Kε=1-ρε,

    View in Article

    ρε=neff22p12-νp11+p12,

    View in Article

    ε=-λ¯cKεΔνR=αΔνR.

    View in Article

    uαα=uLL2+uLL2+uυυ2uLL2+uLL2,

    View in Article

    εfx=εh1-coshkxcoshkL,

    View in Article

    Francesco Falcetelli, Filippo Bastianini, Pawel Bocheński, Leonardo Rossi, Raffaella Di Sante, Gabriele Bolognini. Optical characterization of strain sensing cables for Brillouin optical time domain analysis[J]. Journal of the European Optical Society-Rapid Publications, 2022, 18(1): 2022007
    Download Citation