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Proceedings Paper

All-optical fiber hydrogen sensor based on annealed Pd-Au sensing nanolayers
Author(s): D. Monzón-Hernández; D. Luna-Moreno; Joel Villatoro; G. Badenes
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Paper Abstract

We report an all-optical fiber hydrogen sensor based on absorption changes of evanescent fields caused by an annealed Pd/Au thin film. The sensor consists of a small piece of standard single-mode fiber (SMF) coated with a Pd/Au thin film sandwiched between two multimode fibers (MMFs). Due to core diameter mismatch the SMF cladding guides light. When the device is exposed to hydrogen the layer refractive index diminishes and causes attenuation changes of the evanescent fields. Adding gold to palladium allows the fabrication of fast, durable, and reliable sensors suitable for the detection of hydrogen concentration below the critical 4%.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191F (2 July 2007); doi: 10.1117/12.738424
Show Author Affiliations
D. Monzón-Hernández, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
D. Luna-Moreno, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Joel Villatoro, ICFO--Institut de Ciències Fotòniques (Spain)
G. Badenes, ICFO--Institut de Ciències Fotòniques (Spain)


Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors

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