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Sensors 2012, 12(6), 7485-7495; doi:10.3390/s120607485

A Sensing Element Based on a Bent and Elongated Grooved Polymer Optical Fiber

Received: 27 April 2012 / Revised: 28 May 2012 / Accepted: 28 May 2012 / Published: 1 June 2012
(This article belongs to the Special Issue Optical Fiber Sensors)
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An experimental and numerical investigation is performed into the power loss induced in grooved polymer optical fibers (POFs) subjected to combined bending and elongation deformations. The power loss is examined as a function of both the groove depth and the bend radius. An elastic-plastic three-dimensional finite element model is constructed to simulate the deformation in the grooved region of the deformed specimens. The results indicate that the power loss increases significantly with an increasing bending displacement or groove depth. Specifically, the power loss increases to as much as 12% given a groove depth of 1.1 mm and a bending displacement of 10 mm. Based on the experimental results, an empirical expression is formulated to relate the power loss with the bending displacement for a given groove depth. It is shown that the difference between the estimated power loss and the actual power loss is less than 2%.
Keywords: plastic optical fiber; bending and elongation; displacement sensor plastic optical fiber; bending and elongation; displacement sensor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Lu, W.-H.; Chen, L.-W.; Xie, W.-F.; Chen, Y.-C. A Sensing Element Based on a Bent and Elongated Grooved Polymer Optical Fiber. Sensors 2012, 12, 7485-7495.

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