Title :
Distributed Hydrogen Sensing With Brillouin Scattering in Optical Fibers
Author :
Delepine-Lesoille, Sylvie ; Bertrand, Johan ; Lablonde, Laurent ; Phéron, Xavier
Author_Institution :
Chatenay-Malabry, Nat. Radioactive Waste Manage. Agency, Chatenay-Malabry, France
Abstract :
We report on the design and test of a truly distributed hydrogen sensor based on Brillouin scattering into single-mode G652 optical fibers. The proposed system enables remote, robust, long-term, and truly distributed hydrogen sensing into long-range structures, such as radioactive waste repositories, with a spatial resolution in the order of 2 m over several hundred meters. For the first time, we demonstrate that Brillouin frequency shift depends on hydrogen concentration in the silica core with a rate of approximately 0.21 MHz/%H2 . Influence parameters are discussed. We showed that temperature influence may be corrected with a collocated carbon-coated fiber.
Keywords :
Brillouin spectra; carbon; distributed sensors; fibre optic sensors; gas sensors; hydrogen; optical design techniques; optical fibre testing; radioactive waste repositories; silicon compounds; Brillouin frequency shift; Brillouin scattering; H2; SiO2; SiO2-C; collocated carbon-coated fiber; distributed hydrogen sensing; hydrogen concentration; long-range structures; radioactive waste repositories; sensor design; sensor test; silica core; single-mode G652 optical fibers; spatial resolution; temperature influence; Hydrogen; Optical fiber sensors; Optical fibers; Optical saturation; Optical scattering; Brillouin scattering; hydrogen monitoring; hydrogen sensing; optical fiber sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2206578
