Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
권호 표지
DOI QR코드

DOI QR Code

Design and analysis of a mode size converter composed of periodically segmented taper waveguide

주기적으로 분리된 광도파로로 구성된 모드 크기 변환기의 설계 및 분석

  • 박보근 (광운대학교 전자공학부/전자통신공학과) ;
  • 정영철 (광운대학교 전자공학부/전자통신공학과)
  • Published : 2004.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we designed a mode size converter to reduce coupling loss between optical waveguide and single mode fiber. The proposed mode converter is composed of periodically segmented tapered waveguide to achieve small size and easy fabrication. For the optimally designed mode size converter at 1550nm, the taper length is 500(equation omitted), the segmentation period 5ß:, the waveguide width of fiber contact section 1.3ß:, and duty cycle 0.95. The coupling loss of the optimized mode size converter is 0.33㏈/point, which is 1.27㏈/point lower than that without the mode size converter.

본 논문에서는 광도파로와 광섬유사이에서 광손실을 줄이기 위한 모드 크기 변환기를 설계하였다. 설계된 모드 크기 변환기는 주기적으로 분리된 테이퍼 광도파로로 구성된 모드 크기 변환기이며, 공정상의 적용이 용이한 수평 테이퍼 구조를 선택하였다. 높이와 폭이 3$\mu\textrm{m}$${\times}$3$\mu\textrm{m}$이며 1.5%실리카 광도파로의 경우 파장이 1550nm 파장에서 최적의 모드 크기 변환기 설계 파라미터는 테이퍼 영역의 길이가 500$\mu\textrm{m}$이고, 분리된 광도파로의 길이는 5$\mu\textrm{m}$이며, 주기의 Duty-Cycle은 0.95, 광도파로와 광섬유의 접속면에서의 폭은 1.3$\mu\textrm{m}$이였다. 이 때 결합손실은 0.33㏈/point로 광섬유와 광도파로를 직접 연결할 때 보다 1.27 ㏈/point가 감소하였다.

Keywords

References

  1. Electron. Lett. v.30 no.11 High efficiency, long working distance laser diode to single mode fiber coupling N.Kalonji;I.Semo https://doi.org/10.1049/el:19940567
  2. Electron. Lett. v.28 no.6 Near 100% efficient fiber microlenses H.M.Presby;C.A.Edwards https://doi.org/10.1049/el:19920367
  3. IEEE J. Quantum. Electron. v.3 no.6 A Review on fabrication technologies for the monolithic integration of tapers with Ⅲ-Ⅴ semiconductor Ingrid Moerman;Peter P. Van Daele;Piet M. Demester https://doi.org/10.1109/2944.658785
  4. Electron. Lett. v.38 no.2 Large reduction of single mode-fibre coupling loss in 1.5% Δ planar lightwave circuits using spot-size converters M.Ithoh;T.Saida;Y.hida;M.Ishii;Y.Inoue;Y.Hibino;A.Sugita https://doi.org/10.1049/el:20020059
  5. J. Lightwave Technol. v.13 no.10 Analysis of periodically segmented waveguide mode expander Z.Weissman;I.hendel https://doi.org/10.1109/50.469728
  6. J. lightwave Technol. v.11 no.11 Modes of periodically segmented waveguides Z.Weissman;A.hardly https://doi.org/10.1109/50.251181
  7. Opt. Quantum Elecron. v.22 Silica waveguides on silicon and their application to integrated-optics component M.Kawchi https://doi.org/10.1007/BF02113964
  8. J. Lightwave Technol. v.7 Glass waveguides on silicon for hyrid optical packaging C.H.henry;G.E.Blonder;R.F.Kazarinov https://doi.org/10.1109/50.39094
  9. J. Quantum Electron. v.27 Analysis of Z-invariant and Z-variant semiconductor rib waveguides by explicit finite difference beam propagation method with nonuniform mesh configuration Y.Chung;N.Dagli https://doi.org/10.1109/3.97273
  10. J. lightwave Technol. v.16 no.4 Finite-Element Full-Vectorial Propagation Analysis for Three-Dimensional z-Varying Optical Waveguides E.Montanari;S.Selleri;L.Vincetti;M.Zoboli https://doi.org/10.1109/50.664086