Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Polymeric digital optical switch with a coupling region modified for optimum mode coupling

모드 결합을 최적화 하기 위해 수정된 결합 영역을 갖는 전기광학 폴리머 디지탈 광스위치

  • 이상신 (한국과학기술원 전기 및 전자공학과) ;
  • 신상영 (한국과학기술원 전기 및 전자공학과)
  • Published : 1997.06.01
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Abstract

An electro-optic polymer digital optical switch with a coupling region modified for optimum coupling is designed and demonstrated. Its branch waveguide is fabricated by reactive ion etching. Then, the modified coupling region is adiabatically introduced along the propagation direction from the branching point of the two waveguides, and it is implemented by photobleaching after the device fabrication. The structure of the modified coupling region and its refractive index profiles are designed to optimize and mode coupling in the Y-branch waveguide. Therefore, the switching performance of the device was shown to be enhanced with a fixed device length. The measured drive voltage is reduced by more than 30 percents, and the crosstalk is also improved by about 4~6 dB.

본 논문에서는 모드 결합을 최적화하기 위해 수정된 결합 영역을 갖는 전기광학 폴리머 디지탈 광스위치를 제작하였다. 분기형 도파로는 반응이온식각 방법을 이용하여 만들었다. 그리고, 수정된 결합 영역은 두 광도파로의 분기점에서부터 광파의 진행 방향을 따라 점진적으로 도입하였으며, 소자 제작 이후에 광표백 방법을 이용하여 구현하였다. 분기 영역에서 두 도파로 간의 모드 결합이 최적화 되도록 수정된 결합 영역의 구조와 굴절률 분포를 조절함으로써, 소자의 길이가 고정되어 있는 상태에서 스위칭 성능을 향상시켰다. 측정 결과에 의하면, 구동 전압은 약 30%이상 감소되었으며 누화는 4~6 dB정도 개선되었다.

Keywords

References

  1. App. Phys. Lett. v.51 Digital optical switch Y. Siberberg;P. Perlmutter;J. E. Baran
  2. J. Lighwave Technol. v.12 Design and demonstration of weighed coupling digital Y-branch optical switches in InGaAs/In GaAlAa election transfer waveguides M. N. Kahn;J. E. Zucker;T. Y. Chang;N. J. Sauer;M. D. Divino
  3. Electron. Lett. v.32 $(2{\times}2)$digital optical switch realized by low cost polymer waveguide technology N. Keil;H. H. Yao;C. Zawadzki
  4. IEEE J. Quantum Electron. v.27 Integrated optic devices based on nonlinear optical polymers E. V. Tomme;P. P. V. Daele;R. G. Baets;P. E. Lagasse
  5. Optics Communications Electro-optic polymer digital optical swith with photobleached waveguides and a self-aligned electrode Sang-Shin Lee;Seh Won Ahn;Sang-Yung Shin
  6. J. Lightwave Technol. v.10 Performance and modeling of proton exchanged $LiTaO_3$branching modulators W. K. Burns;M. M. Howerton;R. P. Moeller
  7. J. Ligthwave Technol. v.8 Voltage-length product for modal evolution-type digital switches W. K. Burns
  8. Proc. 21st Eur. Conf. on Opt. Comm. Compact digital optical switches for low insertion loss large switch arrays on Inp M. Renaud;J. F. Vinchant;A. Goutelle;B. Martin;G. Riposhe;M. Bachmann;P. Pagnod;F. Gaborit
  9. IEEE Photon. Technol. Lett. v.4 Shaping the digital switch W.K. Burns
  10. Electron. Lett. v.26 Photoinduced channel waveguide formation in nonlinear optical polymers M.B.J. Diemeer;F. M. M. Suyten;E. S. Trommel;A. McDonach;J. M. Copeland;L. W. Jenneskens;W. H. G. Horsthuis
  11. IEEE Photon. Technol. Lett. v.7 40-GHz polymer electroopric phase modulators W. Wang;D. Chen;H. R. Fetterman;Y. Shi;W. H. Steier;L. R. Dalton
  12. SPIE's International Symposium on Optoelectronics '97, Proc. SPIE. v.2997 Polymeric digital optical switch with a linear branch and an optimized coupling region Sang-Shin Lee;Sang-Yung Shin