Mach–Zehnder Interferometer Based on a Sandwich Fiber Structure for Refractive Index Measurement

@article{Ma2012MachZehnderIB,
  title={Mach–Zehnder Interferometer Based on a Sandwich Fiber Structure for Refractive Index Measurement},
  author={Yue Ma and Xueguang Qiao and Tuan Guo and Ruohui Wang and Jing Yao Zhang and Yinyan Weng and Qiangzhou Rong and Manli Hu and Zhongyao Feng},
  journal={IEEE Sensors Journal},
  year={2012},
  volume={12},
  pages={2081-2085}
}
A novel refractive-index (RI) sensor based on Mach-Zehnder interferometer composed of an uncoated single-mode fiber section sandwiched between two short sections of multimode fiber is proposed and experimentally demonstrated. A clear interference spectrum is obtained and the dip wavelength shifts as a function of surrounding RI. An estimated resolution of 7.1 × 10-5 within the linear sensing range from 1.33 to 1.40 and a maximum up to 6.4 × 10-6 at indexes around 1.44 have been achieved for the… CONTINUE READING
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