title: High-sensitivity strain sensor based on in-fiber improved Fabry-Perot interferometer.
abstract: We demonstrated a high-sensitivity strain sensor based on an in-fiber Fabry-Perot interferometer (FPI) with an air cavity, which was created by splicing together two sections of standard single-mode fibers. The sensitivity of this strain sensor was enhanced to 6.0  pm/με by improving the cavity length of the FPI by means of repeating arc discharges for reshaping the air cavity. Moreover, such a strain sensor has a very low temperature sensitivity of 1.1  pm/°C, which reduces the cross sensitivity between tensile strain and temperature.
authors.forename: Shen
authors.initials: S
authors.lastname: Liu
authors.forename: Yiping
authors.initials: Y
authors.lastname: Wang
authors.forename: Changrui
authors.initials: C
authors.lastname: Liao
authors.forename: Guanjun
authors.initials: G
authors.lastname: Wang
authors.forename: Zhengyong
authors.initials: Z
authors.lastname: Li
authors.forename: Qiao
authors.initials: Q
authors.lastname: Wang
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Zhou
authors.forename: Kaiming
authors.initials: K
authors.lastname: Yang
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Zhong
authors.forename: Jing
authors.initials: J
authors.lastname: Zhao
authors.forename: Jian
authors.initials: J
authors.lastname: Tang
mesh_terms: D000388:Air; D007368:Interferometry / Q000295:instrumentation*; D055100:Optical Fibers; D013696:Temperature