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Proceedings Paper

Micro-vibration or displacement measurement based on a novel Bragg grating pair
Author(s): Bao-jin Peng; Yong Zhao; Chao-fu Ying; Yun-tao Liu; Hui Wang
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Paper Abstract

Micro-vibration or displacement measurement is very important in modern industrial fields, especially for the micro electrical and mechanical system (MEMS). An optical fiber sensor was proposed to measure the micro-vibration or displacement based on a novel fiber Bragg grating pair, in which one of the gratings is written in the fiber cladding and the other is written in the fiber core, however the positions of the two grating are staggered. Because the reflection spectrum of this structural grating is much sharper than that of ordinary grating, the special reflection spectrum of the fiber Bragg grating pair is used, resulting in a high measurement sensitivity. Theoretical analysis of the fiber Bragg grating pair and micro-vibration or displacement measurement principle with the experimental setup (Micro-vibration is measured by this grating pair, while this grating pair is demodulated by ordinary grating) are introduced in this paper.

Paper Details

Date Published: 19 February 2008
PDF: 6 pages
Proc. SPIE 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications, 662520 (19 February 2008); doi: 10.1117/12.791238
Show Author Affiliations
Bao-jin Peng, Zhejiang Normal Univ. (China)
Yong Zhao, Tsinghua Univ. (China)
Chao-fu Ying, Zhejiang Normal Univ. (China)
Yun-tao Liu, Zhejiang Normal Univ. (China)
Hui Wang, Zhejiang Normal Univ. (China)


Published in SPIE Proceedings Vol. 6625:
International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications

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