Mode recoupling between core and cladding modes of cascaded-LPFGs fabricated with heat-shrinkable tube employing a thin confinement layer

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  • Tsutsumi Yasuhiro
    Department of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University College of Science and Engineering, Ritsumeikan University
  • Hase Takahiro
    Department of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University
  • Ohashi Masaharu
    Department of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University
  • Miyoshi Yuji
    Department of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University
  • Kubota Hirokazu
    Department of Electrical and Information Systems, Graduate School of Engineering, Osaka Prefecture University
  • Yamashita Ikuo
    Technical Research Center, Kansai Electric Power Inc.

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Description

<p>Cascaded long period fiber gratings (LPFGs) fabricated with heat-shrinkable tube, screw, and single-mode fiber are proposed herein that employ a thin confinement layer on the bare fiber. The transmittance of a proposed cascaded-LPFG is theoretically and experimentally investigated regarding the cladding mode loss. By employing the confinement layer on the cladding of the proposed LPFGs, mode recoupling between core and cladding modes is successfully induced. Our cascaded-LPFG has potential application for the simple and low-cost optical filters and for the optical sensors monitoring vibration, refractive index, or temperature.</p>

Journal

  • IEICE Communications Express

    IEICE Communications Express 8 (9), 381-386, 2019

    The Institute of Electronics, Information and Communication Engineers

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