26 March 1993 A fiber optic accelerometer using two-mode fibers with an off-center core
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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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Osni Lisboa, Osni Lisboa, C. A. S. de Oliveira, C. A. S. de Oliveira, Cheng-Kuei Jen, Cheng-Kuei Jen, J. Edimar B. Oliveira, J. Edimar B. Oliveira, Sergio F. M. Almeida, Sergio F. M. Almeida, Sidney L.A. Carrara, Sidney L.A. Carrara, } "A fiber optic accelerometer using two-mode fibers with an off-center core", Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); doi: 10.1117/12.141306; https://doi.org/10.1117/12.141306


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