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Proceedings Paper

Modeling of transverse loading effect on Bragg grating signals
Author(s): Stephen Mastro; Mahmoud El-Sherif
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Paper Abstract

Fiber Bragg gratings (FBGs) can provide extremely sensitive strain measurements for various materials and structures. The main functionality of the Bragg grating is along the fiber's main axis, where changes in the grating's spacing can be converted into strain measurements. Previous work from a number of researchers has identified bifurcation and broadening of the Bragg signal under transverse loading. The work presented in this paper highlights efforts to relate transverse loading to changes in index of refraction in the fiber core cross section, and then ultimately to predicted changes in Bragg signals. The modeling work completed provides a useful tool in predicting effects on FBGs of potential transverse loading scenarios, whether these effects are undesirable, or sought after. Analytical and numerical analyses are presented as well as a background of interest in loading effects and birefringence with respect to Bragg grating applications.

Paper Details

Date Published: 16 May 2005
PDF: 7 pages
Proc. SPIE 5758, Smart Structures and Materials 2005: Smart Sensor Technology and Measurement Systems, (16 May 2005); doi: 10.1117/12.606202
Show Author Affiliations
Stephen Mastro, Drexel Univ. (United States)
Mahmoud El-Sherif, Drexel Univ. (United States)

Published in SPIE Proceedings Vol. 5758:
Smart Structures and Materials 2005: Smart Sensor Technology and Measurement Systems
Eric Udd; Daniele Inaudi, Editor(s)

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