Fiber Bragg grating-based load sensor without temperature dependence

• Main Authors: Hu, Limin, Dong, Xinyong, Zhang, Shuqin, Jin, Shangzhong, Wang, Yunpeng, Chan, Chi Chiu, Shum, Perry Ping
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Chemical engineering
• Online Access: https://hdl.handle.net/10356/102031; http://hdl.handle.net/10220/11309
• Institution: Nanyang Technological University

A novel load sensor has been proposed and demonstrated by embedding a fiber Bragg grating (FBG) into a tapered cylindrical polymer rod. Load-induced nonuniform strain field changes the bandwidth, and hence, the reflected optical power of the FBG. Temperature-insensitive measurement of load has been realized by measuring the reflected optical power with only a low-cost optical power meter. Load measurement sensitivity of 5.0 nW/N has been experimentally achieved within a range up to 1800 N.