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Proceedings Paper

Novel bend-insensitive long-period fiber grating sensor
Author(s): Yi-Ping Wang; Yun-Jiang Rao; Zeng-Lin Ran; Tao Zhu; Xiang Kai Zeng
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Paper Abstract

A novel bend-insensitive LPFG sensor written by high-frequency CO2 laser pulses is demonstrated, for the first time, to our knowledge. Experiment results shows that the bend-sensitivity of the novel LPFG depends strongly on curved orientation. The resonant wavelength shifted merely —0. 01 8 nm even for a curvature of 1 . 1m-1at the most bend-insensitive position. Such a bend-insensitive sensor could be used to solve the problem of cross-sensitivity between bend and other measurands, such as temperature, strain or refractive index, which is an unsolved problem for LPFG sensors in practice. In addition, the bend sensitivity of the LPFG can be adjusted by selecting its circular positions.

Paper Details

Date Published: 9 September 2002
PDF: 5 pages
Proc. SPIE 4920, Advanced Sensor Systems and Applications, (9 September 2002); doi: 10.1117/12.481952
Show Author Affiliations
Yi-Ping Wang, Chongqing Univ. (China)
Yun-Jiang Rao, Chongqing Univ. (China)
Zeng-Lin Ran, Chongqing Univ. (China)
Tao Zhu, Chongqing Univ. (China)
Xiang Kai Zeng, Chongqing Univ. (China)

Published in SPIE Proceedings Vol. 4920:
Advanced Sensor Systems and Applications
Yun-Jiang Rao; Julian D. C. Jones; Hiroshi Naruse; Robert I. Chen, Editor(s)

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