Micro-vibration or displacement measurement based on a novel Bragg grating pair

Bao-jin Peng; Yong Zhao; Chao-fu Ying; Yun-tao Liu; Hui Wang

doi:10.1117/12.791238

19 February 2008 Micro-vibration or displacement measurement based on a novel Bragg grating pair

Bao-jin Peng, Yong Zhao, Chao-fu Ying, Yun-tao Liu, Hui Wang

Proceedings Volume 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications; 662520 (2008) https://doi.org/10.1117/12.791238
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

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.

Citation Download Citation

Bao-jin Peng, Yong Zhao, Chao-fu Ying, Yun-tao Liu, and Hui Wang "Micro-vibration or displacement measurement based on a novel Bragg grating pair", Proc. SPIE 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications, 662520 (19 February 2008); https://doi.org/10.1117/12.791238

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