광통신용 도파로형 $Ti:LiNbO_3$ AOTF 제작 및 특성

Characteristics and Fabrication of a Waveguide Type $Ti:LiNbO_3$(Acousto-Optic Tunable Filter) for Optical Communications

  • 김성구 (전자부품종합기술연구소 통신부품연구센터) ;
  • 한상필 (전자부품종합기술연구소 통신부품연구센터) ;
  • 윤형도 (전자부품종합기술연구소 통신부품연구센터) ;
  • 임영민 (전자부품종합기술연구소 통신부품연구센터) ;
  • 윤대원 (전자부품종합기술연구소 통신부품연구센터) ;
  • 정운조 (한려대학교 전기공학과) ;
  • 박계춘 (한려대학교 전기공학과) ;
  • 정해덕 (목표대학교 전기공학과)
  • 발행 : 1998.08.01

초록

The characteristics of waveguide, electrode and packaging fabricated for acousto-optic tunable filters(AOTF) used for optical communications were analyzed. A $Ti:LiNbO_3$in-diffusing method was employed for the formation of the optical waveguide with a dimension of width $8{\mu}m$, length $30000-50000{\mu}m$ and varying the thickness. The diffusion was carried at $1050^{\circ}C$ for 8 hours to pattern the optical waveguide. The resulted waveguide exhibited a single mode at 1550nm optical wavelength. The width of IDT, with 10 SAM periods, was $5000{\mu}m$ . Impedances of the electrodes deposited with Au were analyzed using a network analyzer; $48.1\Omega$ at the center frequency of 193MHz for electrode thickness of $1500{\AA}$ and $50.7\Omega$ at the center frequency of 192MHz for $1600\AA$. And the characteristics of packaged AOTF was analyzed. When the electrical frequency 177.1MHz was applied to the device, the mode conversion efficiency was measured as 63% at the optical wavelength 1515nm.

키워드

참고문헌

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