Influence of the incident angle of strain wave on the sensing sensitivity of fiber Bragg grating

IEICE Electronics Express

Li Cai¹  Xiao Huang²  Yuegang Tan²  Ping Xia² 

[1] School of Mechanical and Electrical Engineering, Wuhan Donghu University;School of Mechanical and Electrical Engineering, Wuhan University of Technology

关键词: FBG;    strain;    incident angle;    sensitivity;   

DOI  :  10.1587/elex.15.20171255

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

In recent years, fiber Bragg grating (FBG) strain sensors have been widely applied to measure strain and relative physical quantities. However, the direction of strain must be along the axial or transverse direction of FBG for many FBG sensors, significantly limiting application. Here, the sensing characteristics of FBG for different incident strain waves were determined, and the influences of the incident angle of static strain, low frequency strain, and high frequency strain on FBG sensitivity were characterized. The construction of an FBG strain sensor that can measure strain with any incident angle is proposed, and additional applications of sensing characteristics are discussed.

【 授权许可】

CC BY