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Hydrogen and deuterium distributed sensing using chirped pulse φOTDR
Author(s): A. García Ruiz; A. Morana; Hugo F. Martins; S. Martín-López; M. González-Herráez; S. Delepine-Lesoille; A. Boukenter; Y. Ouerdane; S. Girard
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Paper 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.

Paper Details

Date Published: 6 September 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111993G (6 September 2019); doi: 10.1117/12.2539094
Show Author Affiliations
A. García Ruiz, Univ. de Alcalá (Spain)
A. Morana, Lab. Hubert Curien, Univ. Jean Monnet (France)
Hugo F. Martins, Institut de Óptica Daza Valdés (IO-CSIC) (Spain)
S. Martín-López, Univ. de Alcalá (Spain)
M. González-Herráez, Univ. de Alcalá (Spain)
S. Delepine-Lesoille, ANDRA (France)
A. Boukenter, Lab. Hubert Curien, Univ. Jean Monnet (France)
Y. Ouerdane, Lab. Hubert Curien, Univ. Jean Monnet (France)
S. Girard, Lab. Hubert Curien, Univ. Jean Monnet (France)


Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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