Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Polarization splitting characteristics of the side-polished fiber coupler with a thin metal interlayer

금속층이 포함된 측면 연마 광섬유 결합기의 편광 분리 특성

  • 김광택 (호남대학교 광전자 공학과) ;
  • 황보승 (호남대학교 광전자 공학과)
  • Received : 2002.03.26
  • Published : 2002.06.01
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Abstract

We report theoretical investigation on the polarization selective coupling characteristics of a side-polished fiber directional coupler with a thin metal interlayer. Based on normal mode theory the coupling properties of the device under various structural conditions are analyzed. It is shown that the coupling strength between TE modes weakens rapidly with increase or metal interlayer thickness, whereas that between TM modes becomes stronger. The design conditions of the polarization splitter using the coupler to achieve high extinction ratio and low insertion loss are presented.

금속박막이 포함된 측면 연마 광섬유 결합기의 편광 선택적 결합 특성에 관한 이론적 연구 결과를 보고한다. 직교 모드이론을 이용하여 다양한 구조 조건에서 소자의 결합 특성을 분석하였다. 금속 박막의 두께가 증가함에 따라 TE 모드사이의 결합의 세기는 급격히 약해지는 반면에 TM 모드의 결합의 세기는 커짐을 보였다. 높은 편광 소멸비와 낮은 삽입 손실을 가지는 편광 분리기의 설계 조건을 제시하였다.

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