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Proceedings Paper

Highly accurate micro-displacement measurement based on Gaussian-chirped tilted fiber Bragg grating
Author(s): Tuan Guo; Jacques Albert; Chengkun Chen; Alexei Ivanov; Albane Laronche
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Paper Abstract

Intensity-referenced and temperature-independent high accuracy displacement measurement is demonstrated by using a Gaussian-chirped tilted fiber Bragg grating (TFBG). A specially designed bending cantilever beam is used to provide a displacement-induced Gaussian-strain-gradient and internal tilt angle modulation along the sensing TFBG. Compared with a straight FBG, the peak intensity of the Bragg resonance in the TFBG shows an improved sensitivity to the displacement but is immune from the spatially uniform temperature changes. A displacement resolution up to 1×10-3 mm and thermal fluctuation less than 2% full-scale for a temperature range of 0~80°C are experimentally achieved.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700417 (16 May 2008); doi: 10.1117/12.785637
Show Author Affiliations
Tuan Guo, Carleton Univ. (Canada)
Jacques Albert, Carleton Univ. (Canada)
Chengkun Chen, Carleton Univ. (Canada)
Alexei Ivanov, Carleton Univ. (Canada)
Albane Laronche, Carleton Univ. (Canada)

Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors
David Sampson; Stephen Collins; Kyunghwan Oh; Ryozo Yamauchi, Editor(s)

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