Polymer optical fiber for large strain measurement based on multimode interference.
This Letter reports a polymer optical fiber (POF) based large strain sensor based on the multimode interference (MMI) theory for the application of structural health monitoring. A section of POFs is sandwiched between two silica single mode fibers to construct a single-mode-multimode-single-mode structure that produces a MMI spectrum. The strain sensing mechanism of the device was investigated and experimentally verified. A large dynamic range of 2×10(4) με (2%) and a detection limit of 33 µε have been demonstrated.
Department of Electrical and Computer Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, USA.
Jie
J
Huang
Xinwei
X
Lan
Hanzheng
H
Wang
Lei
L
Yuan
Tao
T
Wei
Zhan
Z
Gao
Hai
H
Xiao