• 제목/요약/키워드: magneto-optic

검색결과 86건 처리시간 0.024초

자기광학 효과를 이용한 집적형 가변 광감쇠기의 개발 (Development of Integrated Optical Adjustable Attenuator Using Magneto-Optic Effects)

  • 김동일;정세모
    • 대한전자공학회논문지
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    • 제24권6호
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    • pp.1025-1033
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    • 1987

  • This paper describes the development of a new type of an integrated optical adjustable attenuator using magneto-optic effects in 4-layer slab waveguide. The characteristics of the proposed structure are analyzed and evaluated. Furthermore, the fabrication method and attenuation characteristics have been tested by experimets, therby confirming qualitatively the validity of the design theory.

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광섬유를 이용한 Magneto-Optic Current Transformer실현에 관한 연구 (A Study on the Realization of Magneto-Optic Current Transformer by Optical Fiber)

  • 이상효;김은수
    • 한국통신학회논문지
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    • 제8권4호
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    • pp.139-144
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    • 1983

  • 本論文에서는 MCT(magnito-optic current transformer)를 구성하기 위한 單一모우드光纖維의 偏光特性 및 파라데이回轉에 대한 分析 및 實驗을 하였다. 分析過程에서 單一모우드光纖維는 線形延器로 모델링하였으며 측정결과 순수 birefringence는 2.57 /m로 나타났고 구부림에 의한 birefringence는 구부림 반지름의 제곱에 반비례하였다. 그리고 파라데이回轉에 대한 理論的解析의 결과 자계의 세기(H)에 대한 편광회전감도(F)는 F/H=1.4x$10^-5$rad/[Am]로 나타났다.

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Magnetic and structural properties of ultrathin magnetic films: Ni/Pt(111)

  • Nahm, T.U.;Oh, S.J.
    • 한국진공학회지
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    • 제12권S1호
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    • pp.17-20
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    • 2003

  • We have studied magnetic and structural properties of ultrathin Ni films grown on PI(lII) surface using in situ surface magneto-optic Kerr effect and X-ray photoelectron spectroscopy. Perpendicular magnetic anisotropy was absent, and longitudinal Kerr signal was only detectable for Ni films thicker than 6 monolayers. Enhancement in longitudinal Kerr signal by 30% was achieved by post-annealing at temperatures below 800K, but upon annealing at 820K, surface alloy was formed. By using core-level binding-energy shifts, the composition was determined to be Ni 70 at. %.

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