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2 July 2007 All-optical fiber hydrogen sensor based on annealed Pd-Au sensing nanolayers
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Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66191F (2007) https://doi.org/10.1117/12.738424
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy
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%.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. Monzón-Hernández, D. Luna-Moreno, Joel Villatoro, and G. Badenes "All-optical fiber hydrogen sensor based on annealed Pd-Au sensing nanolayers", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191F (2 July 2007); https://doi.org/10.1117/12.738424
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