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Catalytic Fiber Bragg Grating Sensor for Hydrogen Leak Detection in Air

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4 Author(s)
Caucheteur, C. ; Fac. Polytech. de Mons, Mons ; Debliquy, M. ; Lahem, D. ; Megret, P.

The explosion risk linked to the use of hydrogen as fuel requires low-cost and efficient sensors. We present here a multipoint in-fiber sensor capable of hydrogen leak detection in air as low as 1% concentration with a response time smaller than a few seconds. Our solution makes use of fiber Bragg gratings (FBGs) covered by a catalytic sensitive layer made of a ceramic doped with noble metal which, in turn, induces a temperature elevation around the FBGs in the presence of hydrogen in air.

Published in:

Photonics Technology Letters, IEEE  (Volume:20 ,  Issue: 2 )