Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Hybrid-Integrated Tunable Laser Based on Small Double-Ring Resonator with Improved Side Mode Suppression Ratio

부 모드 억제율이 향상된 소형 이중 링 공진 반사기 기반 하이브리드 집적 파장 가변 레이저

  • Kwon, Oh-Sang (Department of Electronics and Communications Engineering, Kwangwoon University) ;
  • Chung, Young-Chul (Department of Electronics and Communications Engineering, Kwangwoon University)
  • 권오상 (광운대학교 전자통신공학과) ;
  • 정영철 (광운대학교 전자통신공학과)
  • Received : 2011.01.14
  • Accepted : 2011.02.28
  • Published : 2011.04.25
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Abstract

In this paper, a small double ring resonator reflector was designed and fabricated using a polymer waveguide, and the measurement result was discussed. A widely tunable characteristic of the small double ring resonator caused by the Vernier effect, which results from the difference of the ring radii, was observed. The insertion loss of the double ring reflector was reduced by minimizing the device length to be as short as possible, and thus the output power and the SMSR (side mode suppression ratio) was greatly enhanced. The hybrid integrated laser based on the small double ring resonator reflector lased with the SMSR of 45 dB. In addition, the wide tuning range of 40 nm could be obtained by injecting a current of 30 mA to an electrode on top of the reflector.

본 논문에서는 폴리머 도파로를 이용하여 소형 이중 링 공진 반사기를 설계하고 제작하여 그 측정 결과를 분석하였다. 소형 이중 링 공진 반사기는 반경이 서로 다른 두 개의 링 공진기 구조에 의한 버니어 효과로 인해 넓은 범위의 파장가변 특성을 확인 할 수 있었다. 소형 이중 링 반사기의 삽입 손실을 줄이기 위해 도파로의 길이를 기존에 보고된 소자에 비하여 크게 줄임으로써 부 모드 억제율이 크게 향상됨을 확인 하였다. 측정결과 소형 이중 링 공진 반사기 기반 하이브리드 집적 레이저는 45 dB의 부모드 억제율을 유지하면서 단일 모드로 발진함을 확인하였다. 또한 소형 이중 링 공진 반사기 상부에 형성된 전극에 최대 30 mA의 튜닝전류를 인가하여 약 40 nm 까지의 파장가변을 확인하였다.

Keywords

References

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