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Proceedings Paper

Long-period fiber grating bending sensors in laminated composite structures
Author(s): Weichong Du; Hwa-Yaw Tam; Michael S. Y. Liu; Xiaoming Tao
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Paper Abstract

In this paper, we present the experimental result of the effect of bending an over-written long-period fiber grating (LPG) on the transmitted power spectrum and total transmitted power of a light-emitting diode (LED). It is found that the total transmitted power through the LPG decreases linearly with bend curvature within the range from 0 to about 0.001/mm. The error for determining the bend curvature due to the actual non-linearity of the sensor is estimated to be +/- 2 X 10-5/mm. Therefore, a simple power measurement scheme using an embedded LPG can be employed to measure the static bend curvature and dynamic process of structures.

Paper Details

Date Published: 21 July 1998
PDF: 9 pages
Proc. SPIE 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (21 July 1998); doi: 10.1117/12.316984
Show Author Affiliations
Weichong Du, Hong Kong Polytechnic Univ. (Canada)
Hwa-Yaw Tam, Hong Kong Polytechnic Univ. (China)
Michael S. Y. Liu, Hong Kong Polytechnic Univ. (Hong Kong)
Xiaoming Tao, Hong Kong Polytechnic Univ. (Hong Kong)


Published in SPIE Proceedings Vol. 3330:
Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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