Fiber Bragg gratings sensing network with a bus chain typology structure

Xiaoyan Wen; Huang Shuai; Fangdong Zhu; Dongsheng Zhang

doi:10.1117/1.OE.55.6.066102

1 June 2016 Fiber Bragg gratings sensing network with a bus chain typology structure

Xiaoyan Wen, Huang Shuai, Fangdong Zhu, Dongsheng Zhang

Author Affiliations +

Funded by: National Science Foundation of China, Natural Science Foundation of China, Fundamental Research Funds for the Central Universities

Optical Engineering, Vol. 55, Issue 6, 066102 (June 2016). https://doi.org/10.1117/1.OE.55.6.066102

Abstract

A fiber Bragg grating (FBG) sensing network with a bus chain typology structure based on time-division multiplexing (TDM) technology has been developed. Each FBG sensor was placed in an isolated branching circuit separated by an optical splitter. By doing this, multiple reflection and spectrum shadow, which are common in a traditional TDM network, were eliminated since incident light reflected by each sensor did not go through the other sensors. Interference among different FBGs was also avoided. The system was experimentally verified by constructing such a network with 17 FBGs involved. Wavelength and position interrogation were successfully realized. Temperature experiment was carried out on four of the FBGs and the sensitivity was 9.87, 9.92, 9.91, and 9.97 pm/°C, respectively. The durability, reliability, and measuring accuracy of the sensing network were effectively improved due to the bus chain typology structure.

Citation Download Citation

Xiaoyan Wen, Huang Shuai, Fangdong Zhu, and Dongsheng Zhang "Fiber Bragg gratings sensing network with a bus chain typology structure," Optical Engineering 55(6), 066102 (1 June 2016). https://doi.org/10.1117/1.OE.55.6.066102

Published: 1 June 2016

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