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Sylvie Delepine-Lesoille   Dr.  Research or Laboratory Scientist 
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Sylvie Delepine-Lesoille published an article in June 2017.
Top co-authors See all
Y. Ouerdane

180 shared publications

Laboratoire Hubert Curien, UMR-CNRS 5516, F42000 Saint-Etienne, France

Sylvain Girard

87 shared publications

Laboratoire Hubert Curien, CNRS UMR5516, Université de Lyon, Université Jean Monnet, F-42023, Saint-Etienne, France

Aziz Boukenter

69 shared publications

Laboratoire Hubert Curien, CNRS UMR5516, Université de Lyon, Université Jean Monnet, F-42023, Saint-Etienne, France

Georges Humbert

46 shared publications

XLIM Research Institute

Norman Wagner

44 shared publications

Institute of Material Research and Testing - MFPA at the Bauhaus-University Weimar, Coudraystrasse 9, 99423 Weimar, Germany

Publication Record
Distribution of Articles published per year 
(2009 - 2017)
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Publications See all
Article 0 Reads 1 Citation France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repos... Sylvie Delepine-Lesoille, Sylvain Girard, Marcel Landolt, Jo... Published: 13 June 2017
Sensors, doi: 10.3390/s17061377
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
This paper presents the state of the art distributed sensing systems, based on optical fibres, developed and qualified for the French Cigéo project, the underground repository for high level and intermediate level long-lived radioactive wastes. Four main parameters, namely strain, temperature, radiation and hydrogen concentration are currently investigated by optical fibre sensors, as well as the tolerances of selected technologies to the unique constraints of the Cigéo’s severe environment. Using fluorine-doped silica optical fibre surrounded by a carbon layer and polyimide coating, it is possible to exploit its Raman, Brillouin and Rayleigh scattering signatures to achieve the distributed sensing of the temperature and the strain inside the repository cells of radioactive wastes. Regarding the dose measurement, promising solutions are proposed based on Radiation Induced Attenuation (RIA) responses of sensitive fibres such as the P-doped ones. While for hydrogen measurements, the potential of specialty optical fibres with Pd particles embedded in their silica matrix is currently studied for this gas monitoring through its impact on the fibre Brillouin signature evolution.
Article 0 Reads 3 Citations Steady γ-Ray Effects on the Performance of PPP-BOTDA and TW-COTDR Fiber Sensing Isabelle Planes, Sylvain Girard, Aziz Boukenter, Emmanuel Ma... Published: 17 February 2017
Sensors, doi: 10.3390/s17020396
DOI See at publisher website ABS Show/hide abstract
We investigated the evolution of the performances of Pulse Pre Pump-Brillouin Time Domain Analysis (PPP-BOTDA) and Tunable Wavelength Coherent Optical Time Domain Reflectometry (TW-COTDR) fiber-based temperature and strain sensors when the sensing optical fiber is exposed to two γ-ray irradiation conditions: (i) at room temperature and a dose rate of 370 Gy(SiO2)/h up to a total ionizing dose (TID) of 56 kGy; (ii) at room temperature and a dose rate of 25 kGy(SiO2)/h up to a TID of 10 MGy. Two main different classes of single-mode optical fibers have been tested in situ, radiation-tolerant ones: fluorine-doped or nitrogen-doped core fibers, as well as Telecom-grade germanosilicate ones. Brillouin and Rayleigh Sensitivities of N-Doped fibers were not reported yet, and these characterizations pave the way for a novel and alternative sensing scheme. Moreover, in these harsh conditions, our results showed that the main parameter affecting the sensor sensitivity remains the Radiation Induced Attenuation (RIA) at its operation wavelength of 1550 nm. RIA limits the maximal sensing range but does not influence the measurement uncertainty. F-doped fiber is the most tolerant against RIA with induced losses below 8 dB/km after a 56 kGy accumulated dose whereas the excess losses of other fibers exceed 22 dB/km. Both Rayleigh and Brillouin signatures that are exploited by the PPP-BOTDA and the TW-COTDR remain unchanged (within our experimental uncertainties). The strain and temperature coefficients of the various fibers under test are not modified by radiations, at these dose/dose rate levels. Consequently, this enables the design of a robust strain and temperature sensing architecture for the monitoring of radioactive waste disposals.
Article 0 Reads 1 Citation Error Analysis of Clay-Rock Water Content Estimation with Broadband High-Frequency Electromagnetic Sensors—Air Gap Effec... Thierry Bore, Norman Wagner, Sylvie Delepine Lesoille, Frede... Published: 18 April 2016
Sensors, doi: 10.3390/s16040554
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Broadband electromagnetic frequency or time domain sensor techniques present high potential for quantitative water content monitoring in porous media. Prior to in situ application, the impact of the relationship between the broadband electromagnetic properties of the porous material (clay-rock) and the water content on the frequency or time domain sensor response is required. For this purpose, dielectric properties of intact clay rock samples experimental determined in the frequency range from 1 MHz to 10 GHz were used as input data in 3-D numerical frequency domain finite element field calculations to model the one port broadband frequency or time domain transfer function for a three rods based sensor embedded in the clay-rock. The sensor response in terms of the reflection factor was analyzed in time domain with classical travel time analysis in combination with an empirical model according to Topp equation, as well as the theoretical Lichtenecker and Rother model (LRM) to estimate the volumetric water content. The mixture equation considering the appropriate porosity of the investigated material provide a practical and efficient approach for water content estimation based on classical travel time analysis with the onset-method. The inflection method is not recommended for water content estimation in electrical dispersive and absorptive material. Moreover, the results clearly indicate that effects due to coupling of the sensor to the material cannot be neglected. Coupling problems caused by an air gap lead to dramatic effects on water content estimation, even for submillimeter gaps. Thus, the quantitative determination of the in situ water content requires careful sensor installation in order to reach a perfect probe clay rock coupling.
Article 0 Reads 1 Citation Fabrication of optical fibers with palladium metallic particles embedded into the silica cladding Stéphanie Leparmentier, Georges Humbert, Jean-Louis Auguste,... Published: 15 October 2015
Optical Materials Express, doi: 10.1364/ome.5.002578
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Absorption of hydrogen gas (H2) in contact with palladium (Pd) makes Pd a material of choice for numerous H2 sensors. In this paper, we present the fabrication of optical fibers with embedded Pd particles in the silica cladding of the fibers. Fiber preforms prepared with a powder mixture of silica and palladium oxide (PdO) are heat-treated under specific conditions to reduce PdO to metallic Pd particles, dispersed in the silica matrix. Optical fibers with different topologies have been fabricated with lengths of several hundred meters and PdO concentration ranging from 0.01% to 5% mol (in addition to silica). Oxidation state, homogeneity, shape and size distribution of the particles embedded in the cladding of the preform and the fiber samples are studied with structural and micro-structural characterizations. Optical properties of the fibers are finally studied for evaluating the potential of this proof-of-concept work.
PROCEEDINGS-ARTICLE 0 Reads 0 Citations Study of the hydrogen influence on the acoustic velocity of single-mode fibers by Rayleigh and Brillouin backscattering ... S. Leparmentier, J. L. Auguste, G. Humbert, G. Pilorget, L. ... Published: 28 September 2015
24th International Conference on Optical Fibre Sensors, doi: 10.1117/12.2194102
DOI See at publisher website
Article 0 Reads 5 Citations Effects of Radiation and Hydrogen-Loading on the Performances of Raman Distributed Temperature Fiber Sensors Chiara Cangialosi, Sylvain Girard, Aziz Boukenter, Marco Can... Published: 15 June 2015
Journal of Lightwave Technology, doi: 10.1109/jlt.2014.2388453
DOI See at publisher website