Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Constant inversion black box model of EDFAs including various loss mechanisms

Loss mechanism을 고려한 밀도 반전이 고정된 EDFA의 black box 모델링에 대한 연구

  • 민범기 (서울대학교 전기·컴퓨터공학부 광통신시스템연구실) ;
  • 이원재 (서울대학교 전기·컴퓨터공학부 광통신시스템연구실) ;
  • 박재형 (서울대학교 전기·컴퓨터공학부 광통신시스템연구실) ;
  • 박남규 (서울대학교 전기·컴퓨터공학부 광통신시스템연구실)
  • Published : 2001.06.01
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Abstract

We propose a constant inversion black box model of erbium-doped fiber amplifiers (EDFAs) for exact performance predictions for EDFAs operated in the gain-flattened condition. The validity of the newly proposed model was experimentally verified by predicting the performance of EDFAs for the L band, within 1.9% required pump power discrepancy. The role of ion pairing effects on the power conversion efficiency is also discussed. ussed.

본 논문에서는 최근 주목받고 있는 장파장 EDFA(Erbium-Doped Fiber Amplifer)에서의 성능 분석, 특히 전력변환률(Power Conversion Efficiency)의 예측을 위한 밀도반전이 고정된 상태에서의 black box 모델을 유도하고 이득이 평탄화된 장파장 EDFA의 요구되는 펌프파워측면에서 수치해석과 실험을 통하여 유도된 모델의 유용성을 증명하였다. 모델을 통한 펌프파워의 예측치는 실험오차 범위내에서 1.9%이내의 정확성을 보였다. 밀도반전이 고정된 상태에서의 black box 모델은 일반적으로 980nm, 1480m, 펌핑의 경우 모두 적용이 가능하며 EDF의 3가지 이상의 길이에 대하여 입력 펌프파워와 입력/출력 신호파워의 관계를 측정하여 밀도반전이 일정한 상태에서 다른 동작점의 성능을 예측할 수 있었다. 또한 단파장 EDFA에서는 손실의 효과가 크게 나타나지 않아 해석적인 해와 일치하는 결과가 알려져 있었으나 이에 비해 장파장 EDFA에서는 여러 가지 손실의 효과가 더욱 크게 작용하게 되며 특히 paired ion의 효과로 인한 손실로써 비선형적인 관계식이 유도됨을 보였다.

Keywords

References

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