Hydrogen and deuterium distributed sensing using chirped pulse φOTDR

A. García Ruiz; A. Morana; Hugo F. Martins; S. Martín-López; M. González-Herráez; S. Delepine-Lesoille; A. Boukenter; Y. Ouerdane; S. Girard

doi:10.1117/12.2539094

6 September 2019 Hydrogen and deuterium distributed sensing using chirped pulse φOTDR

A. García Ruiz, A. Morana, Hugo F. Martins, S. Martín-López, M. González-Herráez, S. Delepine-Lesoille, A. Boukenter, Y. Ouerdane, S. Girard

Author Affiliations +

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111993G (2019) https://doi.org/10.1117/12.2539094
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

The detection and quantification of the presence of certain chemical species is of central importance regarding permanent structural health monitoring of key industrial fields and civil infrastructures such as oil extraction boreholes or radioactive waste repositories, where H₂ is released. With this work we propose and test a competitive technique able to measure the concentration of hydrogen and deuterium thanks to their diffusion into the silica glass of a standard optical fiber, already employed for the distributed monitoring of large infrastructures. The proposed technique, based on Chirped-Pulse Phasesensitive Reflectometry (CP-φOTDR), could represent a novel solution for this problem, thanks to its ability to provide dynamical measurements of refractive index change, with great linearity and sensitivities of 10^-8 refractive index units, featuring spatial resolutions of a few meters and kilometric sensing ranges.

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A. García Ruiz, A. Morana, Hugo F. Martins, S. Martín-López, M. González-Herráez, S. Delepine-Lesoille, A. Boukenter, Y. Ouerdane, and S. Girard "Hydrogen and deuterium distributed sensing using chirped pulse φOTDR", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111993G (6 September 2019); https://doi.org/10.1117/12.2539094

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