title: Nonlinear fiber-optic strain sensor based on four-wave mixing in microstructured optical fiber.
abstract: We demonstrate a nonlinear fiber-optic strain sensor, which uses the shifts of four-wave mixing Stokes and anti-Stokes peaks caused by the strain-induced changes in the structure and refractive index of a microstructured optical fiber. The sensor thus uses the inherent nonlinearity of the fiber and does not require any advanced postprocessing of the fiber. Strain sensitivity of -0.23 pm/με is achieved experimentally and numerical simulations reveal that for the present fiber the sensitivity can be increased to -4.46 pm/με by optimizing the pump wavelength and power.
authors.affiliation: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark. gubobo@coer.zju.edu.cn
authors.forename: Bobo
authors.initials: B
authors.lastname: Gu
authors.forename: Wu
authors.initials: W
authors.lastname: Yuan
authors.forename: Michael H
authors.initials: MH
authors.lastname: Frosz
authors.forename: A Ping
authors.initials: AP
authors.lastname: Zhang
authors.forename: Sailing
authors.initials: S
authors.lastname: He
authors.forename: Ole
authors.initials: O
authors.lastname: Bang