Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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A study on characterization of directional coupler using LiNbO$_3$

LiNbO$_3$ 기판을 이용한 방향성결합형 광 변조기 특성 연구

  • 강기성 (상지전문대학 전자과) ;
  • 김창원 (경북대학교 센서기술연구소) ;
  • 소대화 (명지대학교 전자공학과)
  • Published : 1995.05.01
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Abstract

A guide-wave electro-optical modulatored direct-ional coupler 1X2 was fabricated on LiNbO$_3$ by proton exchange with self-aligned method After proton exchange process, the waveguide is formed by annealing process, The relationship between refractive index change of waveguide and maximun output was studied a long the annealing time. A self-alinged method was used to simplify the fabrication process of the waveguide and the maximize the efficiency of electric field. The modulatored directional coupler 1${\times}$2 has very good figures of merits; The measured crosstalk was -29.5[dB] and the modulating voltage of 8.0[V].

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