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Twin-core fiber interferometric bending sensor based on optical spectrum analysis method
Yang Jun #,Yuan Libo *,Zhu Xiaoliang,Zhang Yu,Liu Binbin,Zhang Jianzhong,Dai Qiang,Tian Fengjun
Harbin Engineering University
*Correspondence author
#Submitted by
Subject:
Funding: 国家自然科学基金,教育部博士点基金(No.60577005,20050217014)
Opened online:12 January 2009
Accepted by: none
Citation: Yang Jun,Yuan Libo,Zhu Xiaoliang.Twin-core fiber interferometric bending sensor based on optical spectrum analysis method[OL]. [12 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27613
 
 
A fiber optic bending sensing system that uses twin-core fiber as the sensing element has been proposed and demonstrated. The twin-core fiber act as a two-beam interferometer in which phase differences is a function of the curvature, and it can be demodulated by the shift of the unique identification spectrum. By way of FFT analysis of the white light interferometric spectrum, the variation of bending can be measured. The relationship between the bending curvature and the shift of the unique identification spectrum has been given and the experimental results were also confirmed this.
Keywords:twin-core fiber;fiber optic bending sensor;two-beam interferometer, curvature sensor;white light interferometric channel spectrum
 
 
 

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