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Proceedings Paper

Fiber optic accelerometer using two-mode fibers with an off-center core
Author(s): Osni Lisboa; C. A. S. de Oliveira; Cheng-Kuei Jen; J. Edimar B. Oliveira; Sergio F. M. Almeida; Sidney L.A. Carrara
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Paper Abstract

The sensing mechanism of an optical fiber accelerometer based on the interaction between the frequency shifted two modes in a two-mode fiber with an off-center core is presented. When the fiber is bent, by the action of an acceleration in a specific direction, due to the asymmetry induced by the off-center core, there exists a preferential net strain. The bending causes a tension or a compression field in the fiber and provides a positive or negative acceleration, respectively. The frequency shift is achieved by an collinear acousto-optic interaction in the two-mode fiber. We show both theoretical analysis and experimental results. Several approaches which can enhance the sensitivity are also provided.

Paper Details

Date Published: 26 March 1993
PDF: 9 pages
Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); doi: 10.1117/12.141306
Show Author Affiliations
Osni Lisboa, McGill Univ. (Canada)
C. A. S. de Oliveira, National Research Council Canada (Canada)
Cheng-Kuei Jen, National Research Council Canada (Canada)
J. Edimar B. Oliveira, Instituto Tecnologico Aeronautica (Brazil)
Sergio F. M. Almeida, Instituto Tecnologico Aeronautica (Brazil)
Sidney L.A. Carrara, Instituto Tecnologico Aeronautica (Brazil)

Published in SPIE Proceedings Vol. 1798:
Fiber Optic Smart Structures and Skins V
Richard O. Claus; Robert S. Rogowski, Editor(s)

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