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Proceedings Article

Long-period fiber grating bending sensors in laminated composite structures

[+] Author Affiliations
Weichong Du

Hong Kong Polytechnic Univ. (Canada)

Hwa-Yaw Tam

Hong Kong Polytechnic Univ. (China)

Michael S. Y. Liu, Xiaoming Tao

Hong Kong Polytechnic Univ. (Hong Kong)

Proc. SPIE 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, 284 (July 21, 1998); doi:10.1117/12.316984
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From Conference Volume 3330

  • Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
  • Richard O. Claus; William B. Spillman, Jr.
  • San Diego, CA | March 01, 1998

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.

© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Weichong Du ; Hwa-Yaw Tam ; Michael S. Y. Liu and Xiaoming Tao
"Long-period fiber grating bending sensors in laminated composite structures", Proc. SPIE 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, 284 (July 21, 1998); doi:10.1117/12.316984; http://dx.doi.org/10.1117/12.316984


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