Highly sensitive long-period fiber-grating strain sensor with low temperature sensitivity.
A long-period fiber-grating sensor with a high strain sensitivity of -7.6 pm/microepsilon and a low temperature sensitivity of 3.91 pm/ degrees C is fabricated by use of focused CO(2) laser beam to carve periodic grooves on a large- mode-area photonic crystal fiber. Such a strain sensor can effectively reduce the cross-sensitivity between strain and temperature, and the temperature-induced strain error obtained is only 0.5 microepsilon/ degrees C without using temperature compensation.
Wang
Yi-Ping
YP
Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China.
Xiao
Limin
L
Wang
D N
DN
Jin
Wei
W