Long-period fiber grating bending sensors in laminated composite structures

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

Research output: Journal article publicationConference articleAcademic researchpeer-review

53 Citations (Scopus)


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× 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.
Original languageEnglish
Pages (from-to)284-292
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Dec 1998
EventSmart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials - San Diego, CA, United States
Duration: 2 Mar 19982 Mar 1998

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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