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Proceedings Paper

Simultaneous multipoint strain measurement using cascaded long period fiber gratings
Author(s): Satoshi Tanaka; Osamu Tsukida; Tang Tung Ngo; Atsushi Wada; Nobuaki Takahashi
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Paper Abstract

A fiber-optic strain sensor array using long period fiber gratings (LPGs) is proposed and demonstrated, in which cascaded LPGs (C-LPGs) are employed as the sensing elements and a Fourier transform technique is applied to their periodic channeled spectra for the interrogation scheme. In this technique, strain-induced shift of the channeled spectrum of C-LPG can be determined precisely from the cross-spectrum (i.e. Fourier transform of cross-correlation) between the original and shifted channeled spectra and multiplexing operation of C-LPG sensor array can be achieved by using the different C-LPGs having the channeled spectra with various periods. In the experiment, several kinds of CLPGs are fabricated by UV-irradiation technique and simultaneous multipoint strain measurements are successfully demonstrated.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96343Q (28 September 2015); doi: 10.1117/12.2194685
Show Author Affiliations
Satoshi Tanaka, National Defense Academy (Japan)
Osamu Tsukida, National Defense Academy (Japan)
Tang Tung Ngo, National Defense Academy (Japan)
Atsushi Wada, National Defense Academy (Japan)
Nobuaki Takahashi, National Defense Academy (Japan)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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