A New Hydrogen Sensor Based on SNS Fiber Interferometer with Pd/WO₃ Coating

This paper presents a new hydrogen sensor based on a single mode-no core-single mode (SNS) fiber interferometer structure. The surface of the no core fiber (NCF) was coated by Pd/WO₃ film to detect the variation of hydrogen concentration. If the hydrogen concentration changes, the refractive index o...

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Published in:Sensors (Basel, Switzerland) Switzerland), 2017-09, Vol.17 (9), p.2144
Main Authors: Shao, Jinxin, Xie, Wenge, Song, Xi, Zhang, Yanan
Format: Article
Language:English
Subjects:
fiber interferometer
Hydrogen
hydrogen sensor
Linearity
Low cost
Metals
no core fiber (NCF)
Pd/WO3 film
Refractivity
Sensors
Structural stability
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cited_by cdi_FETCH-LOGICAL-c469t-694cbb1f2adc739f3ba960eca142176a5ce0851b0fdcf69ed2866a7e3bc2591b3
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creator Shao, Jinxin
Xie, Wenge
Song, Xi
Zhang, Yanan
description This paper presents a new hydrogen sensor based on a single mode-no core-single mode (SNS) fiber interferometer structure. The surface of the no core fiber (NCF) was coated by Pd/WO₃ film to detect the variation of hydrogen concentration. If the hydrogen concentration changes, the refractive index of the Pd/WO₃ film as well as the boundary condition for light propagating in the NCF will all be changed, which will then cause a shift into the resonant wavelength of interferometer. Therefore, the hydrogen concentration can be deduced by measuring the shift of the resonant wavelength. Experimental results demonstrated that this proposed sensor had a high detection sensitivity of 1.26857 nm/%, with good linearity and high accuracy (maximum 0.0055% hydrogen volume error). Besides, it also possessed the advantages of simple structure, low cost, good stability, and repeatability.
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subjects fiber interferometer
Hydrogen
hydrogen sensor
Linearity
Low cost
Metals
no core fiber (NCF)
Pd/WO3 film
Refractivity
Sensors
Structural stability
title A New Hydrogen Sensor Based on SNS Fiber Interferometer with Pd/WO₃ Coating
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