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31 December 2010 Fiber Bragg grating displacement sensor research based on edge filter demodulation
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Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 75442V (2010) https://doi.org/10.1117/12.885559
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China
Abstract
In this paper, an edge filter demodulation of fiber Bragg grating (FBG) displacement measuring scheme using long period grating (LPG) is reported and demonstrated. The system consists of a 3dB coupler, a sensing FBG, a LPG and a photo-detector. As the sensing element, FBG can convert the displacement information into the shift of the Bragg wavelength, and then the wavelength information is converted into power using edge filter demodulation. The experimental results show that there is good linear relation between the output power detected by the photo-detector and the displacement in the measurable ranges 0-3.6mm. The displacement sensitivity is 9.24pw/mm.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yonglin Huang "Fiber Bragg grating displacement sensor research based on edge filter demodulation", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75442V (31 December 2010); doi: 10.1117/12.885559; https://doi.org/10.1117/12.885559
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