Ultra-highly sensitive hydrogen sensor based on fiber Fabry-Perot interferometer with Pt/WO3 coating

Yao Wang; Minghong Yang; Guilin Zhang; Jixiang Dai; Yi Zhang; Zhi Zhuang

doi:10.1117/12.2058845

2 June 2014 Ultra-highly sensitive hydrogen sensor based on fiber Fabry-Perot interferometer with Pt/WO₃ coating

Yao Wang, Minghong Yang, Guilin Zhang, Jixiang Dai, Yi Zhang, Zhi Zhuang

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91574F (2014) https://doi.org/10.1117/12.2058845
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

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.

Citation Download Citation

Yao Wang, Minghong Yang, Guilin Zhang, Jixiang Dai, Yi Zhang, and Zhi Zhuang "Ultra-highly sensitive hydrogen sensor based on fiber Fabry-Perot interferometer with Pt/WO₃ coating", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91574F (2 June 2014); https://doi.org/10.1117/12.2058845

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