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

The Institute of Electronics and Information Engineers (대한전자공학회)
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The Characteristics of Noise Figure in Bi-directional Fiber Ring Laser Gain Clamped EDFA

양방향 발진고리형 고정이득 EDFA에서의 잡음지수 특성

  • Kim, Ik-Sang (Dept.of Information Communication Engineering, Paichai University) ;
  • Kim, Chang-Bong ;
  • Lee, Hyeon-Jae (Optical Communiction Dept.Electronics and Telecommunications Research Institute) ;
  • Myeong, Seung-Il (Optical Communiction Dept.Electronics and Telecommunications Research Institute)
  • 김익상 (배재대학교 정보통신공학부) ;
  • 김창봉 (공주대학교 정보통신공학부, 생산기술연구소) ;
  • 이현재 (한국전자통신연구원 광통신연구부) ;
  • 명승일 (한국전자통신연구원 광통신연구부)
  • Published : 2002.04.01
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Abstract

FRLGC(Fiber Ring laser Gain Clamped) EDFA Is demonstrated for an automatic gain control in hi-directional ADM(Add Drop Multiplexer) node configuration. Specifically, we investigate hi-directional characteristics of noise figure. Assuming a hi-directional small signal input, noise figures for forward or backward signal input are calculated using average inversion algorithm, according to the propagating directions and lasing wavelengths of a compensating signal. The operating condition of FRLGC-EDFA may be optimized with a backward lasing and short lasing wavelength in the aspect of hi-directional noise figure characteristics.

양방향 ADM 노드에서 자동이득제어를 위해 발진고리형 고정이득 EDFA를 적용할 경우 잡음지수 특성을 검토하고자 한다. 이를 위해 소신호 입력인 경우에 한해서 발진보상광의 발진방향 및 발진파장에 따른 잡음지수 특성을 평균밀도반전 알고리즘에 의해 계산하였고 실험적으로 확인하였다. 그 결과 단파장의 발진보상광이 광섬유고리에서 후방 발진을 일으킬 경우가 양방향의 소신호 잡음지수 측면에서는 가장 양호한 조건으로 판명되었다.

Keywords

References

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