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Proceedings Paper

Multi-channel output of time division multiplexed fiber Bragg grating sensing network based on a cascade electrical switches array
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Paper Abstract

Multi-channel output of time division multiplexed fiber Bragg grating sensing network was realized using a cascaded electrical switches array. The emission of a broadband light source modulated by an electro-optic modulator was injected into a four-element fiber Bragg grating sensor array spaced 10m apart. The clock-signal, which is the same as the modulating signal from the electro-optic modulator, was exploited to control the secondary cascaded switches. The signal outgoing from switches was allocated by the pulses and reflected by the sensor elements into a cascade electrical switches array. The sensor signal was then transmitted to the corresponding parallel linking switch that was controlled by the time-delay signal generator on the basis of the time delay of the sensor signal, arriving at the cascaded electrical switches array. By using demodulation with the unbalanced Michelson interferometer, which converted the wavelength shift to phase changes, the measurand was attained by the phase meter. Performance of the proposed system with a sensing sensitivity at the wavelength of 1560 nm found to be 1.654 Deg per micro-strain, which has good agreement with theoretical estimation of 1.673 Deg per micro-strain.

Paper Details

Date Published: 28 September 2006
PDF: 6 pages
Proc. SPIE 6354, Network Architectures, Management, and Applications IV, 63542G (28 September 2006); doi: 10.1117/12.687542
Show Author Affiliations
Shengchun Liu, Heilongjiang Univ. (China)
Jintao Zhang, Heilongjiang Univ. (China)
Youlong Yu, Heilongjiang Univ. (China)
Jinan Univ. (China)

Published in SPIE Proceedings Vol. 6354:
Network Architectures, Management, and Applications IV
Yong Hyub Won; Gee-Kung Chang; Ken-ichi Sato; Jian Wu, Editor(s)

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