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Abstract <p>A fiber-optic interferometer sensitive to variations in the constant magnetic field is presented. A magnetostrictive material is used as its sensitive element. The sensor is based on the Fabry–Perot interferometer with the length determined using a unique signal processing algorithm, which allows the measurement accuracy to be improved by two orders of magnitude. Advantages of the sensor are a high dynamic range, small size, and standard components. The working range of the sensor is <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(B \leqslant 50{\text{ mT}}\)</EquationSource> <!--PhysWave2570038Likhachev-m1--> </InlineEquation> and the dynamic range is 84 dB. Recommendations are given for increasing the system sensitivity and the measurement accuracy.</p>

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Interferometric Fiber-Optic Magnetic Field Sensor

  • 期刊论文

  • 发表日期：

    2025年12月29日

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  • I. G. Likhachev,
  • V. I. Pustovoy,
  • V. N. Sorokovikov

摘要

Abstract

A fiber-optic interferometer sensitive to variations in the constant magnetic field is presented. A magnetostrictive material is used as its sensitive element. The sensor is based on the Fabry–Perot interferometer with the length determined using a unique signal processing algorithm, which allows the measurement accuracy to be improved by two orders of magnitude. Advantages of the sensor are a high dynamic range, small size, and standard components. The working range of the sensor is \(B \leqslant 50{\text{ mT}}\) and the dynamic range is 84 dB. Recommendations are given for increasing the system sensitivity and the measurement accuracy.