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Journal of Modern Optics Volume 56, 2009 - Issue 17
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Original Articles

Analytical and experimental studies on asymmetric bundle fiber displacement sensors

K.S. Lim Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai 50603, Kuala Lumpur, Malaysia
,
S.W. Harun Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai 50603, Kuala Lumpur, Malaysia; Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai 50603, Kuala Lumpur, MalaysiaCorrespondence[email protected]
,
H.Z. Yang Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai 50603, Kuala Lumpur, Malaysia
,
K. Dimyati Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai 50603, Kuala Lumpur, Malaysia
&
H. Ahmad Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai 50603, Kuala Lumpur, Malaysia
Pages 1838-1842 | Received 30 Jun 2009, Accepted 24 Sep 2009, Published online: 26 Oct 2009
 
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Abstract

A fiber-optic displacement sensor (FODS) is theoretically and experimentally studied using an asymmetrical bundled fiber. The bundled fiber consists of two parallel fibers with different core radial ratios (CRRs) to achieve different sensitivity and dynamic range for displacement measurements. Both analytical modeling and experimental observations show that the linear range and sensitivity can be adjusted by controlling the CRR between transmitting and receiving fibers. This increases the flexibility of the sensor, which can be used for precise non-contact sensing applications.

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