Al-doped optical fiber to enhance strain sensitivity of Brillouin based optical fiber sensors

Y. Sikali Mamdem; F. Taillade; Y. Jaouën; R. Gabet; G. Moreau; A. Faustov; G. Pilorget; S. Delepine-Lesoille

doi:10.1117/12.2059535

2 June 2014 Al-doped optical fiber to enhance strain sensitivity of Brillouin based optical fiber sensors

Y. Sikali Mamdem, F. Taillade, Y. Jaouën, R. Gabet, G. Moreau, A. Faustov, G. Pilorget, S. Delepine-Lesoille

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915730 (2014) https://doi.org/10.1117/12.2059535
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

In order to meet application requirements, dependence of the Brillouin frequency shift to strain should be enhanced. We evaluated the influence of several optical fiber dopants on Brillouin scattering strain sensitivity. Based on a FEM-2D modeling, we developed a model for Brillouin gain spectrum and its strain sensitivity. Geometrical profile, doping composition and drawing conditions are taken into account. We show alumina is a very interesting dopant to enhance strain sensitivity in optical fibers. This result is experimentally validated: up to 0.0639MHz/μƐ is obtained with a 5.2mol% Al₂O₃ doped fiber. We expect to reach 0.1MHz/μƐ with 25mol% doping level.

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Y. Sikali Mamdem, F. Taillade, Y. Jaouën, R. Gabet, G. Moreau, A. Faustov, G. Pilorget, and S. Delepine-Lesoille "Al-doped optical fiber to enhance strain sensitivity of Brillouin based optical fiber sensors", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915730 (2 June 2014); https://doi.org/10.1117/12.2059535

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