Long-period fiber grating bending sensors in laminated composite structures

Weichong Du; Hwa-Yaw Tam; Michael S. Y. Liu; Xiaoming Tao

doi:10.1117/12.316984

21 July 1998 Long-period fiber grating bending sensors in laminated composite structures

Weichong Du, Hwa-Yaw Tam, Michael S. Y. Liu, Xiaoming Tao

Proceedings Volume 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials; (1998) https://doi.org/10.1117/12.316984
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

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.

Citation Download 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, (21 July 1998); https://doi.org/10.1117/12.316984

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