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

한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
권호 표지

광위상변조기 제작용 Single Channel 및 1$^\circ$ Y-branch Mach-Zehnder간섭기형 Ti:LiNbO$_3$ 도파로 Pigtailing 및 도파실험

Pigtailing and Guiding Experiments of Single and 1$^\circ$ Y-branch Ti:LiNbO$_3$ Mach-Zehnder Inteferometric Optical Waveguide for fabricating an Optical Phase Modulator

  • 김성구 (전자부품종합 기술연구소) ;
  • 정운조 (한려대학교 정보통신과) ;
  • 조재철 (초당대학교 전자공학과) ;
  • 박계춘 (목포대학교 전기공학과) ;
  • 이진 (목포대학교 전기공학과)
  • Kim, Seong-Ku (Korea Electronics Technology Institute) ;
  • Jung, Won-Jo (Dept.of Inf.& Comm.,Hanlyo University) ;
  • Cho, Jae-Cheol (Dept.of Chodang University) ;
  • Park, Kye-Choon (Dept.of Electrical Eng., Mokpo University) ;
  • Lee, Jin (Dept.of Electrical Eng., Mokpo University)
  • 발행 : 1998.06.01
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초록

We report some methods for measuring a LiNbO$_3$ optical phase modulator bandwidth. Since Mach-Zehnder waveguide type, one of methods for modulation bandwidth measurement, is comparatively simple and useful, it was adapted in this work. In order to confirm this method, the waveguide of single and Mach-Zehnder type were fabricated on the same wafer. The Mach-Zehnder interferometric waveguide and the single channel waveguide were used for the measurement of the phase modulator's driving voltage and bandwidth for device fabrications, respectively. Ti-860$\AA$ in-diffusion was achieved in a wet-bubbling oxygen environment at 105$0^{\circ}C$/8hours. LINbO$_3$ internal chips were pigtailed to PMF(polarization maintaining fiber)/SMF(single mode fiber) using an epoxy curing technique. Examined were optical properties such as an insertion loss, propagation loss and mode size, and the loss mechanism of optical coupling between an optical fiber and a waveguide was considered.

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