Beyond 21 km Distributed Strain Measurement with Brillouin Optical Correlation Domain Reflectometry Using Polarization Diversity Method and Temporal Gating Scheme

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  • Furukawa Osamu
    R&D Department, Innovation Center, Marketing Headqurters, Yokogawa Electric Corporation
  • Tezuka Shin-ichirou
    R&D Department, Innovation Center, Marketing Headqurters, Yokogawa Electric Corporation
  • Tsukamoto Masaki
    Fiber Sensing Department, Product Business Center, IA Platform Headquarters, Yokogawa Electric Corporation
  • Matsuura Satoshi
    R&D Department, Innovation Center, Marketing Headqurters, Yokogawa Electric Corporation
  • Kishi Masato
    Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo
  • Hotate Kazuo
    Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo

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Other Title
  • 偏波ダイバーシティ技術と時間ゲート法を用いたブリルアン光相関領域反射計測法による距離21 kmでの歪み分布測定
  • ヘンパ ダイバーシティ ギジュツ ト ジカン ゲートホウ オ モチイタ ブリルアン ヒカリ ソウカン リョウイキ ハンシャ ケイソクホウ ニ ヨル キョリ 21km デ ノ ヒズミ ブンプ ソクテイ

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<p>We develop a Brillouin optical correlation domain reflectometry (BOCDR) system using polarization diversity method and temporal gating scheme. Polarization diversity method is used for detecting backscattered light with rotated polarization from single mode fiber (SMF), and temporal gating scheme is used for expanding the measurement range. A section with 3 m length and 6000 µε strain was experimentally measured at a distance of 21 km SMF with 20 cm nominal spatial resolution. Our result shows the figure of merit NR, which is a ratio between the measurement range and the spatial resolution, reaches to 105965.</p>

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