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Diametric load sensor using a fiber Bragg grating and its differential group delay analysis
Wang Yiping * #,Huang Xiaoqin,Sun Yongxi
School of Physics Science and Technology, Nanjing Normal University, 210046
*Correspondence author
#Submitted by
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Funding: the Specialized Research Fund for the Doctoral Program of Higher Education （No.Grant No. 20103207120004）
Opened online:28 March 2012
Accepted by: none
Citation: Wang Yiping,Huang Xiaoqin,Sun Yongxi.Diametric load sensor using a fiber Bragg grating and its differential group delay analysis[OL]. [28 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4472357
 
 
Different from the basic sensing theory of the fiber Bragg grating (FBG) sensors based on spectral analysis, a new method exploiting the polarization properties of FBG for diametric load sensing is proposed. In this paper, the evolution of the differential group delay (DGD) response of FBG with respect to the diametric load is completely studied. The centroid information of the DGD evolution of FBG is subsequently proposed for diametric load sensing. Experiments were carried out to verify the reasonability and feasibility of the sensing method. Good agreements between experimental results and numerical simulations had been obtained.
Keywords:Fiber Bragg grating, Diametric load, Differential group delay, Height of centroid.
 
 
 

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