Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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A theoretical study on Ti:LiNbO3 integrated optical polarization mode controllers

Ti:LiNbO3 집적광학형 편광모드 조절기의 이론적 고찰

  • 문제영 (홍익대학교 대학원, 전자전산공학과) ;
  • 정홍식 (홍익대학교 대학원, 전자전산공학과) ;
  • 이한영 (광통신연구센터, 전자부품연구원)
  • Published : 2004.04.01
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Abstract

We investigated a Ti:LiNbO$_3$ based integrated-optic polarization controller with a Ti-indiffused waveguide along the z-axis utilizing the electro-optic effect. The device consists of a first quarter-wave (λ/4) phase-shifter followed by a half-wave(λ/2) and a second quarter-wave(λ/4) wave-plate, which is rotated synchronously with the first quarter-wave phase-shifter. We analyzed the operation principles of the device utilizing cascaded transfer matrices based on Jones matrix and Poincare sphere, simulated driving voltages for various input states of polarization (SOP), and theoretically confirmed transformations from any arbitrary input SOP into any general output SOP.

z-축 방향으로 진행하는 Ti:LiNbO$_3$ 광도파로와 전기광학효과를 이용하여 설계된 집적광학형 편광조절기를 검토하였다. 소자는 λ/4 - λ/2 - λ/4 wave-plates들로 구성되었으며, Jones matrix에 근거하여 유도된 전달 메트릭스와 Poincare 구 좌표계를 이용하여 소자의 동작원리를 체계적으로 분석하였다. 편광제어에 필요한 전압들을 전산모사 하였으며, 이로부터 본 연구에서 제안된 편광조절기는 어떠한 입력 편광 상태로부터 특정한 출력 편광 상태로 변화시킬 수 있음을 확인하였다.

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References

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