title: High-sensitivity strain sensor based on inflated long period fiber grating.
abstract: We demonstrated a high-sensitivity strain sensor based on an inflated long period fiber grating (I-LPFG). The I-LPFG was inscribed, for the first time to the best of our knowledge, by use of the pressure-assisted CO(2) laser beam scanning technique to inflate periodically air holes of a photonic crystal fiber. Such periodic inflations enhanced the sensitivity of the LPFG-based strain sensor to -5.62 pm/με. After high temperature annealing, the I-LPFG achieved a good repeatability and stability of temperature response with a sensitivity of 11.92 pm/°C.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Zhong
authors.forename: Yiping
authors.initials: Y
authors.lastname: Wang
authors.forename: Junle
authors.initials: J
authors.lastname: Qu
authors.forename: Changrui
authors.initials: C
authors.lastname: Liao
authors.forename: Shen
authors.initials: S
authors.lastname: Liu
authors.forename: Jian
authors.initials: J
authors.lastname: Tang
authors.forename: Qiao
authors.initials: Q
authors.lastname: Wang
authors.forename: Jing
authors.initials: J
authors.lastname: Zhao
authors.forename: Kaiming
authors.initials: K
authors.lastname: Yang
authors.forename: Zhengyong
authors.initials: Z
authors.lastname: Li