Fiber Bragg grating-based load sensor without temperature dependence
Chan, Chi Chiu
Shum, Perry Ping
Date of Issue2012
School of Chemical and Biomedical Engineering
Network Technology Research Centre
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.
Microwave and optical technology letters
© 2012 Wiley Periodicals, Inc.