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Proceedings Paper

A novel long-period fiber grating torsion sensor
Author(s): Shouhua Guan; Qingxu Yu; Shide Song; Xiaodong Liu; Zhaoyuan Song
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Paper Abstract

In this paper, we propose and demonstrate a novel torsion sensor based on a long-period fiber grating (LPFG) induced symmetrically by three beams of focused high-frequency CO2 laser pulses (20~24 kHz). Experimental results show, when the LPFG is twisted clockwise, the resonant wavelength shifts toward shorter wavelengths, and the peak loss decreases. When the LPFG is twisted anticlockwise, the resonant wavelength shifts toward longer wavelengths, and the peak loss increases. The resonant wavelength and the peak loss are all similarly proportional to the twist angle applied. Based on this LPFG, a new kind of fiber-optic torsion sensors can be made, which can not only directly measure the torsion angle, but also determine the torsion direction simultaneously by means of measuring the shift of the resonant wavelength and/or the peak loss of the LPFG.

Paper Details

Date Published: 10 June 2006
PDF: 7 pages
Proc. SPIE 6344, Advanced Laser Technologies 2005, 63440W (10 June 2006); doi: 10.1117/12.693441
Show Author Affiliations
Shouhua Guan, Dalian Nationalities Univ. (China)
Dalian Univ. of Technology (China)
Qingxu Yu, Dalian Univ. of Technology (China)
Shide Song, Dalian Univ. of Technology (China)
Xiaodong Liu, Dalian Nationalities Univ. (China)
Zhaoyuan Song, Dalian Nationalities Univ. (China)
Yanshan Univ. (China)


Published in SPIE Proceedings Vol. 6344:
Advanced Laser Technologies 2005
Ivan A. Shcherbakov; Kexin Xu; Qingyue Wang; Alexander V. Priezzhev; Vladimir I. Pustovoy, Editor(s)

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