28 September 2015 Simultaneous multipoint strain measurement using cascaded long period fiber gratings
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96343Q (2015) https://doi.org/10.1117/12.2194685
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
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.
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Satoshi Tanaka, Satoshi Tanaka, Osamu Tsukida, Osamu Tsukida, Tang Tung Ngo, Tang Tung Ngo, Atsushi Wada, Atsushi Wada, Nobuaki Takahashi, Nobuaki Takahashi, } "Simultaneous multipoint strain measurement using cascaded long period fiber gratings ", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96343Q (28 September 2015); doi: 10.1117/12.2194685; https://doi.org/10.1117/12.2194685
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