Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Novel Criterions to determine Optimized Power coupling in Grating-Assisted Fiber Couplers (GAFCs)

격자구조형 광섬유 결합기에서 최적 전력결합을 결정하기 위한 새로운 조건

  • 호광춘 (한성대학교 정보통신공학과) ;
  • 호광수 (계명대학교 기계공학과)
  • Published : 2006.04.01
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Abstract

A grating-assisted fiber coupler(GAFC), which consists of a thin-film waveguide with grating and circular optical fiber, is proposed and the optimized power coupling is evaluated by using a technique amenable to rigorous longitudinal modal transmission-line theory(L-MTLT). In addition, novel criteria to couple an optical signal incident through the grating waveguide to a single-mode optical fiber are proposed. The numerical result reveals that the optimized power coupling occurs at minimum-gap condition between rigorous modes rather than for the conventional phase-matching condition.

격자 구조형 평면도파로와 원통형 광섬유로 구성된 격자구조형 광섬유 결합기(GAFC)를 제안하였고, 그 최적 전력결합 특성을 종방향 모드 전송선로이론(L-MTLT)에 기초하여 분석하였다. 또한, 격자 구조형 평면도파로에서 입사된 광신호가 단일 모드 광섬유로 결합되기 위한 새로운 최적 조건들을 제시하였다. 수치해석 결과 GAFCs에서 최적 전력결합 특성은 기존에 널리 사용하는 위상정합 조건이 아닌 새로운 조건(즉, 정확한 모드의 최소간격 조건)에서 나타났다.

Keywords

References

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