Nonlinear fiber-optic strain sensor based on four-wave mixing in microstructured optical fiber |
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Authors: | Gu Bobo Yuan Wu Frosz Michael H Zhang A Ping He Sailing Bang Ole |
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Institution: | DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, ?rsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark. gubobo@coer.zju.edu.cn |
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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. |
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