パルスレーザを用いた高周波近傍磁界計測における新しい同期手法の提案

DOI

書誌事項

タイトル別名
  • Proposal of new synchronization method in high frequency near magnetic field measurement using pulsed laser

抄録

<p>  In recent years, EMC problems have been worried such as device malfunctions by leakage electromagnetic waves. To overcome this problem, we need the ability to accurately measure the high-frequency magnetic field. Generally, a loop coil is used to measure a high-frequency magnetic field, but the magnetic field distribution is disturbed because it’s made of metal. Therefore, we use magneto-optic crystal and pulsed laser to detect magnetic field, which is low invasiveness against the magnetic field. In addition, by using the stroboscopic method, we can measure AC magnetic field with phase information. However, to use the stroboscopic method, it is necessary to synchronize the pulsed laser oscillation and the magnetic field to be measured. In previous studies, a reference synchronization signal was used to synchronize the magnetic field to be measured and laser oscillation. In this study, we made a laser trigger signal from the output signal from the VCO (Voltage Controlled Oscillator). While magnetic fields to be measured are GHz band, using frequency divider allows to make it as the laser trigger frequency with the specified fraction of the integer. In addition, using the proposed technique, we confirmed that the leakage magnetic field inside the VCO circuit could be measured.</p>

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詳細情報 詳細情報について

  • CRID
    1390566775132514560
  • NII論文ID
    130007839700
  • DOI
    10.20819/msjtmsj.20tr418
  • ISSN
    24320471
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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