title: Polarization-dependent in-line quasi-Michelson interferometer based on PM-PCF reflection.
abstract: An in-line fiber quasi-Michelson interferometer (IFQMI) working on reflection is proposed and experimentally demonstrated. The sensing head is fabricated by splicing a section of polarization-maintaining photonic crystal fiber (PM-PCF) with a lead-in single mode fiber (SMF). Some cladding modes are excited into the PM-PCF via the mismatch-core splicing interface between PM-PCF and SMF. Besides, two orthogonal polarized-modes are formed due to the inherent multiholes cladding structure of the PM-PCF. A well-defined interference pattern is obtained as the result of cladding-orthogonal modes interference. The IFQMI with 20 cm long PM-PCF is proposed for strain and torsion measurements. A strain sensitivity of -1.3 pm/με and a torsion sensitivity of -19.17 pm/deg are obtained, respectively. The proposed device with 10 cm long PM-PCF exhibits a considered temperature sensitivity of 9.9 pm/°C. The IFQMI has a compact structure and small size, making it a good candidate for multiparameter measurements.
authors.affiliation: Department of Physics, Northwest University, Xi'an, China. dyy_optical@163.com
authors.forename: Yanying
authors.initials: Y
authors.lastname: Du
authors.forename: Xueguang
authors.initials: X
authors.lastname: Qiao
authors.forename: Qiangzhou
authors.initials: Q
authors.lastname: Rong
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Dingyi
authors.initials: D
authors.lastname: Feng
authors.forename: Ruohui
authors.initials: R
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Sun
authors.forename: Manli
authors.initials: M
authors.lastname: Hu
authors.forename: Zhongyao
authors.initials: Z
authors.lastname: Feng