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Proceedings Paper

Ultra-highly sensitive hydrogen sensor based on fiber Fabry-Perot interferometer with Pt/WO3 coating
Author(s): Yao Wang; Minghong Yang; Guilin Zhang; Jixiang Dai; Yi Zhang; Zhi Zhuang
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Paper Abstract

A miniaturized fiber tip Fabry-Perot interferometer (FPI) with Pt/WO3 coating was demonstrated as a hydrogen sensor. The air-cavity of FPI was formed by inserting a single mode fiber (SMF) into a partially polymer-filled glass capillary, which was highly sensitive to temperature. A layer of Pt/WO3 was coated on the glass capillary of the FPI serving as a reaction heater upon hydrogen exposure. The heat locally raised the FPI temperature, which led to the wavelength shift of interference spectrum. The average wavelength shift of two interference dips was -20.3 nm upon exposure to ~20000 ppm hydrogen concentration. The hydrogen sensitivity of the sensor was estimated to be better than 1 pm/ppm.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91574F (2 June 2014); doi: 10.1117/12.2058845
Show Author Affiliations
Yao Wang, Wuhan Univ. of Technology (China)
Minghong Yang, Wuhan Univ. of Technology (China)
Guilin Zhang, Wuhan Univ. of Technology (China)
Jixiang Dai, Wuhan Univ. of Technology (China)
Yi Zhang, Institute of Structural Mechanics (China)
Zhi Zhuang, Institute of Structural Mechanics (China)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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