title: Highly sensitive long-period fiber-grating strain sensor with low temperature sensitivity.
abstract: 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.
authors.affiliation: Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China.
authors.forename: Yi-Ping
authors.initials: YP
authors.lastname: Wang
authors.forename: Limin
authors.initials: L
authors.lastname: Xiao
authors.forename: D N
authors.initials: DN
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Jin