Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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An Extended L-band Erbium-doped Fiber Amplifier to Amplify 1625 nm OTDR Signal for a Long Distance Monitoring System

장거리 광선로 감시용 1625 nm OTDR 신호 증폭을 위한 효율적인 Extended L-band Erbium-doped Fiber Amplifier

  • 이한협 (충남대학교 자연과학대학 물리학과 양자점 융합 광소자 연구실) ;
  • 서대동 (충남대학교 자연과학대학 물리학과 양자점 융합 광소자 연구실) ;
  • 이동한 (충남대학교 자연과학대학 물리학과 양자점 융합 광소자 연구실) ;
  • 최현범 ;
  • 전정우 (KT 차세대통신망연구소)
  • Published : 2005.10.01
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Abstract

We have designed an extended L-band Erbium-doped fiber amplifier to amplify 1625 nm optical time domain reflectometry signal for a long distance monitoring system. The proposed amplifier has a dual-stage structure without an isolator. Gain improvement of 5.1 dB has been achieved by adding a fiber Bragg grating and a narrow band pass filter. As a result, the 16.3 dB gain and 7.1 dB noise figure has been successfully accomplished.

Optical Time Domain Reflectometry를 이용하여 수백 km 이상의 장거리 광통신망을 감시하기 위해서는 감시광을 증폭시켜야한다. 본 논문에서는 1625 nm OTDR 감시광을 증폭시키기 위해 fiber Bragg grating과 band pass filter를 이용하여 이득과 잡음지수를 각각 5.1 dB 그리고 0.9 dB 향상시킨 2단 구조의 Extended L-band EDFA를 제안하였다. 제안된 Extended L-band EDFA의 1625 nm 대역의 신호 이득은 16.3 dB이고 잡음지수는 7.1 dB였다.

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References

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