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Proceedings Paper

Analysis on intensity demodulated strain sensing based on multiple phase-shifted FBG
Author(s): Xiaolei Zhang; Gangding Peng; Faxiang Zhang; Haifeng Qi; Zhiqiang Song; Shujuan Li; Jiasheng Ni; Chang Wang
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Paper Abstract

An intensity demodulated strain sensing scheme based on multiple phase-shifted fiber Bragg grating (FBG) is investigated. Wavelength shifts related to the external strain signal will result in various power change received by the photodetector. The reflected spectrum of the sensing multiple phase-shifted FBG are designed using the transfer matrix method to and fabricated by dithering phase mask method. The strain sensing scheme is analyzed numerically by relate the power change to reflectivity spectrum, thus help us optimize the design and fabrication of multiple phase-shifted FBG to achieve maximum sensitivity. The experimental results show that the strain sensitivity can be significantly enhanced by over 10dB by using phase-shifted FBG with many phase shifts compared to a normal FBG.

Paper Details

Date Published: 17 November 2014
PDF: 5 pages
Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92740C (17 November 2014); doi: 10.1117/12.2071720
Show Author Affiliations
Xiaolei Zhang, Shandong Academy of Sciences (China)
Gangding Peng, The Univ. of New South Wales (Australia)
Faxiang Zhang, Shandong Academy of Science (China)
Haifeng Qi, Shandong Academy of Science (China)
Zhiqiang Song, Shandong Academy of Sciences (China)
Shujuan Li, Shandong Academy of Science (China)
Jiasheng Ni, Shandong Academy of Sciences (China)
Chang Wang, Shandong Academy of Sciences (China)

Published in SPIE Proceedings Vol. 9274:
Advanced Sensor Systems and Applications VI
Tiegen Liu; Shibin Jiang; Niels Neumann, Editor(s)

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