期刊
OPTICAL FIBER TECHNOLOGY
卷 65, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.yofte.2021.102616
关键词
Gas sensor; Surface plasmon resonance; Fiber optic sensor; TiO2 film
资金
- National Nature Science Foundation of China [51775283, 51875292]
In this study, a fiber optic Surface Plasmon Resonance (SPR) sensor based on Ag/TiO2 at 1550 nm wavelength for hydrogen sensing was proposed and demonstrated. The sensor design and experimental results show a high sensitivity to hydrogen concentration.
We propose and demonstrate the fiber optic Surface Plasmon Resonance (SPR) for hydrogen sensing based on Ag/TiO(2)( )at the telecommunications wavelength of 1550 nm. The sensor using TiO2 as a sensitive layer for hydrogen detection consists of a multilayer film of 45 nm Ag/110 nm TiO2 deposited on the coupling prism substrate. An intensity interrogation SPR with Kretschmann configuration is designed, where SPR phenomenon will occur at the interface of the Ag/TiO2 film, and the hydrogen concentration will be detected by measuring the change in the reflected intensity. The sensitivity of the sensor is optimal at an Ag/TiO2 thickness. Simulation and experimental results demonstrate that the fiber-optic SPR sensor developed provides hydrogen sensing and has a high sensitivity to a hydrogen concentration ranging between 14.7% and 25% Hydrogen in Air, reaching 523nW/%.
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