Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Analysis of Dielectric Rectangular Waveguide and Directional Coupler with Step Index Profile by the Modified Effective Index Method

수정된 실효 굴절율법에 의한 계단형 굴절률 분포를 갖는 광도파로와 방향성 결합기의 해석

  • Kim, Chang Min (Dept. of Elec. Eng., Seoul City Univ.) ;
  • Jung, Byung Gi (Dept. of Elec. Eng., Seoul City Univ.) ;
  • Lee, Choang Woong (Dept. of Elec. Eng., Seoul National Univ.)
  • 김창민 (서울시립대 전자공학과) ;
  • 정병기 (서울시립대 전자공학과) ;
  • 이충웅 (서울대학교 전자공학과)
  • Published : 1986.04.01
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Abstract

Based on the modified effective index method, analysis of dielectric rectangular waveguides and directional couplers are presented. Aside from the effective index concept of channel region, the equivalent index concept of cladding region is proposed. The error problem of eigenvalues, which has been experienced when the effective index method is used, is improved. Our approxiamtions give similar accuracy when compared with the results of other regorous approxiamtion techiniques. The advantage of the modified effective index methods is utilized by replacing the directional coupler with the equivalent slab guides, and the coupling constant is calculated by the coupled mode theory. The effectiveness of the equivalent index concept is positively confirmed.

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