Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Widely Tunable Double-Ring-Resonator Add/Drop Filter

광대역 파장가변 이중 링 공진기 Add/Drop 필터

  • Lee, Dong-Hyun (Department of Electronics and Communications Engineering, Kwangwoon University) ;
  • Lee, Tae-Hyung (Department of Electronics and Communications Engineering, Kwangwoon University) ;
  • Park, Joon-Oh (Department of Electronics and Communications Engineering, Kwangwoon University) ;
  • Kim, Su-Hyun (Department of Electronics and Communications Engineering, Kwangwoon University) ;
  • Chung, Young-Chul (Department of Electronics and Communications Engineering, Kwangwoon University)
  • 이동현 (광운대학교 전자통신공학과) ;
  • 이태형 (광운대학교 전자통신공학과) ;
  • 박준오 (광운대학교 전자통신공학과) ;
  • 김수현 (광운대학교 전자통신공학과) ;
  • 정영철 (광운대학교 전자통신공학과)
  • Published : 2007.06.25
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Abstract

A widely tunable add/drop filter composed of double ring resonators is implemented with high-index-contrast polymer waveguide. To enhance the productivity, directional couplers are designed to have good fabrication tolerance. The refractive indices of the core and cladding in the 1550 nm wavelength are 1.51 and 1.378, respectively. Drop response in comparison with neighborhood peak gets enhanced by more than 2.9 dB at the wavelength where both rings resonate. This filter can be used to build widely tunable laser diode through hybrid-integration with reflective SOA.

본 논문에서는 굴절률 차이가 큰 폴리머 광 도파로를 이용하여 광대역 파장가변이 가능한 이중 링 공진기 Add/Drop 필터를 제작하였다. Add/Drop 필터의 제작시 공정 오차에 둔감한 특성을 갖도록 광 결합기를 설계하였다. 코어와 클래딩의 굴절률은 1550 nm 파장 대역에서 각각 1.51, 1.378로 약 $100{\mu}m$ 정도의 곡률 반경을 가지는 곡선 도파로를 수용할 수 있다. 두 개의 링이 동시에 공진하는 파장 대역에서 Drop 특성은 이웃하는 피크 좌다 약 2.9 dB 이상 높은 특성을 보였다. 이 필터는 반사형 반도체 광증폭기 등과의 하이브리드 집적을 통하여 광대역 파장 가변 레이저 다이오드를 구현하는데 활용할 수 있을 것으로 기대된다.

Keywords

References

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