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Sensors 2011, 11(2), 1375-1382;

A Simple Fiber Bragg Grating-Based Sensor Network Architecture with Self-Protecting and Monitoring Functions

Information and Communications Research Laboratories, Industrial Technology Research Institute (ITRI), Hsinchu 31040, Taiwan
Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
Author to whom correspondence should be addressed.
Received: 22 November 2010 / Revised: 6 January 2011 / Accepted: 14 January 2011 / Published: 26 January 2011
(This article belongs to the Section Physical Sensors)
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A novel fiber Bragg grating (FBG)-based passive sensor architecture, which can be used to protect the fiber cut and monitor the multiple sensors simultaneously, is proposed and experimentally demonstrated. Here, we employ a wavelength-tunable erbium-doped fiber (EDF) laser scheme with 25 km cavity length acting as the detecting light source in central office (CO). Each FBG sensor, serving as a feedback element, is used in proposed sensor architecture. By tuning the tunable bandpass filter (TBF) placing inside cavity to match the corresponding Bragg wavelength of FBG over the amplification bandwidth, we can retrieve the related wavelength lasing for the FBG sensing and monitoring simultaneously. Moreover, the survivability and capacity of the passive FBG sensor architecture can be also enhanced. View Full-Text
Keywords: FBG sensor; fault protection; passive ring architecture FBG sensor; fault protection; passive ring architecture
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yeh, C.-H.; Chow, C.-W.; Wu, P.-C.; Tseng, F.-G. A Simple Fiber Bragg Grating-Based Sensor Network Architecture with Self-Protecting and Monitoring Functions. Sensors 2011, 11, 1375-1382.

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