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...

Full description

Saved in:
Bibliographic Details
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
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1424-8220
1424-8220
DOI:10.3390/s17092144