Novel FBG-based sensor configuration for H2 leak detection in air

C. Caucheteur; M. Debliquy; D. Lahem; C. Crunelle; P. Mégret

doi:10.1117/12.785977

16 May 2008 Novel FBG-based sensor configuration for H₂ leak detection in air

C. Caucheteur, M. Debliquy, D. Lahem, C. Crunelle, P. Mégret

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 700432 (2008) https://doi.org/10.1117/12.785977
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

The explosion risk linked to the use of hydrogen (H₂) as combustible requires low-cost and efficient sensors. We present a multipoint in-fiber sensor capable of H₂ leak detection as low as 1% concentration in air with a response time smaller than a few seconds. Our solution utilizes uniform fiber Bragg gratings (FBGs) surrounded by a catalytic sensitive layer made of a ceramic doped with a noble metal. In the presence of H₂ in air, the sensitive layer undergoes an exothermic reaction and elevates the temperature around the FBGs. The sensor interrogation technique is based on the monitoring of the resonant wavelength shift. In this paper, the performances of the sensor are also discussed.

Citation Download Citation

C. Caucheteur, M. Debliquy, D. Lahem, C. Crunelle, and P. Mégret "Novel FBG-based sensor configuration for H₂ leak detection in air", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700432 (16 May 2008); https://doi.org/10.1117/12.785977

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