Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
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An Efficient Split-Step Time-Domain Dynamic Modeling of DFB/DBR Laser Diodes

연산자 분리 방법을 통한 DFB/DBR 레이저 다이오드의 효율적인 시영역 동적 모델링

  • 김병성 (韓國電子通信硏究院 交換傳送技術硏究所) ;
  • 정영철 (光云大學校 電子工學部/電子通信工學科)
  • Published : 2000.07.01
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Abstract

A novel and efficient approach for the numerical solution of time-dependent coupled-wave equations, which are frequently used for the modeling of DFB(Distributed Feedback), DBR(Distributed Bragg Reflector), and FP(Fabry Perot) laser diodes, is proposed. In this approach, the coupled wave equations are split into two sets of equations. One of two sets of equations contains only the phase factors and the other contains only the coupling terms. The separate equations are solved exactly in their split form successively. This new numerical scheme, which we call the SS-TDM(Split-Step Time Domain Model), is found to require an order of magnitude smaller number of subsections to get accurate results than the previous methods while the computation time for each time step is comparable to the previous methods.

DFB(Distributed Feedback) 및 DBR(Distributed Bragg Reflector) 레이저 다이오드의 모델링에 많이 사용되는 시간 변수가 있는 결합 파동 방정식의 수치해를 효율적으로 구할 수 있는 새로운 방법을 제안 하였다. 이 방법에서는 결합 파동 방정식을 두 세트의 방정식으로 분리하여 해석한다. 한 세트의 방정식들에는 위상 인자 및 이득 인자만 포함되고, 다른 한 세트의 방정식에는 결합항만이 포함된다. 본 논문에서 SS-TDM(Split-Step Time Domain Model)이라고 명명한 새로운 수치해석법은 기존의 방법에 비하여 매시간 스텝당 계산 시간은 비슷한 반면에 분할 구간의 수가 10배 이상 적게 하여도 정확한 결과를 얻을 수 있음을 확인하였다.

Keywords

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