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Proceedings Paper

An extrinsic Fabry-Perot interferometric optical fiber sensor system for hydrogen detection
Author(s): Zhen Yang; Min Zhang; Ming Lei; Xiujuan Yu; Yanbiao Liao; Shurong Lai; Qian Tian; Qisheng Li; Yi Zhang; Zhi Zhuang
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Paper Abstract

An extrinsic Fabry-Perot interferometric (EFPI) optical fiber hydrogen sensor based on palladium silver (Pd-Ag) film is designed for hydrogen leakage detection. The sensing mechanism of such a sensor is based on the mechanical stress that is induced in the Pd-Ag film when it absorbs hydrogen. The sensor system which is portable and suitable for field detection is formed by a conventional coupler, a low-power LED operating at 850 nm, and a high resolution miniature spectrometer. To obtain the absolute length of the EFPI air gap, a cross-correlation signal processing method is introduced.The sensor is suitable for monitoring concentrations of hydrogen below the lower explosive limit.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750323 (5 October 2009); doi: 10.1117/12.835263
Show Author Affiliations
Zhen Yang, Tsinghua Univ. (China)
Min Zhang, Tsinghua Univ. (China)
Ming Lei, Tsinghua Univ. (China)
Xiujuan Yu, Tsinghua Univ. (China)
Yanbiao Liao, Tsinghua Univ. (China)
Shurong Lai, Tsinghua Univ. (China)
Qian Tian, Tsinghua Univ. (China)
Qisheng Li, CAEP (China)
Yi Zhang, CAEP (China)
Zhi Zhuang, CAEP (China)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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