Measurement of Transient Temperature Using Mach-Zehnder Interferometer Employing Polarization Maintaining Fiber

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  • SAKURAI Norimasa
    Graduate School of Science and Engineering, Ibaraki University Graduate School of Science and Engineering, Saitama University
  • KIM Changsu
    Graduate School of Science and Engineering, Ibaraki University Graduate School of Science and Engineering, Saitama University
  • AZUMA Kouji
    Graduate School of Science and Engineering, Ibaraki University Graduate School of Science and Engineering, Saitama University
  • MORIMOTO Yasufumi
    Graduate School of Science and Engineering, Ibaraki University Graduate School of Science and Engineering, Saitama University
  • ISHI Katsunori
    Graduate School of Science and Engineering, Ibaraki University Japan Nuclear Cycle Depelopment Institute
  • SUZUKI Masahiro
    Japan Nuclear Cycle Depelopment Institute
  • KONO Syusaku
    Japan Nuclear Cycle Depelopment Institute
  • FUJII Kan-ichi
    Graduate School of Science and Engineering, Ibaraki University Graduate School of Science and Engineering, Saitama University

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Other Title
  • 偏波保持ファイバ導波マッハツエンダー型干渉計による過渡温度計測
  • 偏波保持ファイバ導波マッハツェンダー型干渉計による過渡温度計測
  • ヘンパ ホジ ファイバドウハ マッハツェンダーガタ カンショウケイ ニ ヨル カト オンド ケイソク

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Abstract

A new system on transient temperature measurement with a Mach-Zehnder interferometer employing Polarization Maintaining Fibers (PMF) has been successfully developed. Two PMF fibers, one as the reference arm that avoids externally added disturbances and another as the sensor arm that monitors temperature change, are employed. When temperature changes, the length and phase constant of the sensor arm changes, resulting in a phase difference at the mixing point of two optical waves after passing through both arms, forming interference fringes of concentric circles that move quickly in a radial direction. This system enables us to measure the transient state of temperature change with a resolution of (6/1000)°C and time resolution of 0.1 s.

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