Fiber Bragg grating displacement sensor research based on edge filter demodulation

Yonglin Huang

doi:10.1117/12.885559

31 December 2010 Fiber Bragg grating displacement sensor research based on edge filter demodulation

Yonglin Huang

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.

Citation Download Citation

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); https://doi.org/10.1117/12.885559

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