A simple temperature-insensitive fiber Bragg grating displacement sensor |
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Authors: | Jun Hong Ng Xiaoqun Zhou Xiufeng Yang Jianzhong Hao |
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Institution: | Institute for Infocomm Research, 21 Heng Mui Keng Terrace, Singapore 119613, Singapore |
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Abstract: | The study on fiber Bragg grating (FBG) displacement sensor based on monitoring the back-reflected power from an array of novelly embedded FBG sensors is presented. The sensor is a uniform FBG with three sections that are embedded in different layer in a composite lamina. Its bandwidth is displacement dependent and hence its reflected power varies almost linearly with displacement and it is insensitive to temperature variation. Thus, only low-cost photodetector (PD) is required to monitor displacement. This study demonstrates a novel fiber sensor, a method of fabricated the same, and a method to achieve simultaneous multi-sensor measurement. |
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Keywords: | Fiber sensor Fiber Bragg grating (FBG) |
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