Optical Fiber Hydrogen Sensors with Pd/W03 Composite Thin Film by Magntron Co-Sputtering

Author

Yang, Minghong ; Sun, Yan ; Zhang, Dongsheng ; Jiang, Desheng

Author_Institution

Nat. Eng. Lab. for Opt. Fiber Sensors, Wuhan Univ. of Technol., Wuhan, China

fYear

2009

fDate

14-16 Aug. 2009

Firstpage

1

Lastpage

3

Abstract

A fiber-optic hydrogen gas sensor using composite palladium and tungsten trioxide (WO₃) was proposed and characterized. This sensor utilizes the absorption of the evanescent field interaction in the clad of Pd/WO₃ thin film which was prepared by magnetron co-sputtering process, coated on a silica core. Modulation of optical power intensity is observed, a clear increase of power with hydrogen and decrease of power without hydrogen can be concluded. Compared to pure Pd sensitive material, an improvement of response time is reported. Meanwhile, there is no recovery in nitrogen environment, and recovery happens only in oxygen-existing condition. It is suspected that the recovery process is connected to oxidation of the Pd/WO₃ surface.

Keywords

fibre optic sensors; gas sensors; hydrogen; optical modulation; palladium; tungsten compounds; H; Pd-WO₃; composite thin film; evanescent field interaction; magntron co-sputtering; optical fiber hydrogen sensors; optical power intensity modulation; tungsten trioxide; Gas detectors; Hydrogen; Optical fiber sensors; Optical fibers; Optical films; Optical modulation; Palladium; Sensor phenomena and characterization; Thin film sensors; Tungsten;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronics, 2009. SOPO 2009. Symposium on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-4412-0

Type

conf

DOI

10.1109/SOPO.2009.5230235

Filename

5230235