Evaluation Parameter for Self-Healing FBG Sensor Networks After Multiple Fiber Failures

• Main Authors: Dagong Jia, Yulong Zhang, Zhitong Chen, Hongxia Zhang, Tiegen Liu, Yimo Zhang
• Format: Article
• Language: English
• Published: IEEE 2015-01-01
• Series: IEEE Photonics Journal
• Subjects: Fiber optics sensors; Fiber Bragg gratings; signal attenuation rate (SAR); self-healing
• Online Access: https://ieeexplore.ieee.org/document/7118646/
• ISSN: 1943-0655

Quantitatively evaluating the reliability of fiber Bragg grating (FBG) sensor networks becomes problematic as the number of working fiber failures increases in dedicated protection mode. To solve this problem, a signal attenuation rate (SAR) of the sensor system is proposed to evaluate self-healing capabilities after increased working fiber failures. We analyze the influencing factors and calculate the theoretical values of SAR under different network states for values of split ratio a = 0.1, 0.5, and 0.9. Our theoretical model was experimentally demonstrated using an FBG sensor network with four sensors. The results of our calculations using this model agree with our experimental results.