Effect of bending and orientation on the fiber modal mach–zehnder interferometer

Authors

  • Yan Liu,

    1. Key Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
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  • Bo Liu,

    Corresponding author
    1. Key Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
    • Key Laboratory of Opto-Electronic Information and Technology, Institute of Modern Optics, Nankai University, Tianjin 300071, China
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  • Yinping Miao,

    1. School of Electronics Information Engineering, Tianjin Key Laboratory of Film Electronic and Communication Device, Tianjin University of Technology, Tianjin 300384, China
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  • Hao Zhang,

    1. Key Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
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  • Jian Liu

    1. Key Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
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Abstract

By introducing two notches along the fiber axis in a normal single-mode fiber through CO2 laser exposure, a vector curvature sensor based on a modal Mach–Zehnder interferometer has been proposed and experimentally demonstrated.Transmission spectral response regarding the spectrum shift and transmission loss variation of the proposed sensor has been characterized and the experimental results show that due to the nonperfect circular geometry of the fiber cladding, the peak wavelength and the transmission loss of its spectrum are sensitive to applied bending orientation. Our proposed sensor has many advantages such as low cost, easy fabrication and good stability under harsh environment. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:136–139, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26471

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