DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark.
Opt Lett. 2012 Mar 1;37(5):794-6. doi: 10.1364/OL.37.000794.
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.
我们展示了一种基于光纤的非线性应变传感器，它利用微结构光纤的结构和折射率因应变而发生的变化引起的四波混频斯托克斯和反斯托克斯峰的位移。因此，该传感器利用了光纤的固有非线性，不需要对光纤进行任何复杂的后处理。实验实现了-0.23 pm/με 的应变灵敏度，数值模拟表明，通过优化泵浦波长和功率，本光纤的灵敏度可以提高到-4.46 pm/με。
