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Proceedings Paper

Fiber Bragg grating displacement sensor research based on edge filter demodulation
Author(s): Yonglin Huang
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Paper Abstract

In this paper, an edge filter demodulation of fiber Bragg grating (FBG) displacement measuring scheme using long period grating (LPG) is reported and demonstrated. The system consists of a 3dB coupler, a sensing FBG, a LPG and a photo-detector. As the sensing element, FBG can convert the displacement information into the shift of the Bragg wavelength, and then the wavelength information is converted into power using edge filter demodulation. The experimental results show that there is good linear relation between the output power detected by the photo-detector and the displacement in the measurable ranges 0-3.6mm. The displacement sensitivity is 9.24pw/mm.

Paper Details

Date Published: 31 December 2010
PDF: 6 pages
Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75442V (31 December 2010); doi: 10.1117/12.885559
Show Author Affiliations
Yonglin Huang, Nanjing Univ. of Posts and Telecommunications (China)

Published in SPIE Proceedings Vol. 7544:
Sixth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Xianfang Wen, Editor(s)

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