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

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Simple Optical Signal to Noise Ratio Monitoring Technique for OADM

광섬유 브래그 격자를 이용한 광 분기 결합기의 광신호 대 잡음비 측정방법

  • Youn, Ji-Wook (Optical Communications Department, Electronics and Telecommunications Research Institute) ;
  • Park, Heuk (Optical Communications Department, Electronics and Telecommunications Research Institute) ;
  • Kim, Kwang-Joon (Optical Communications Department, Electronics and Telecommunications Research Institute)
  • 윤지욱 (한국전자통신연구원 광통신연구부) ;
  • 박혁 (한국전자통신연구원 광통신연구부) ;
  • 김광준 (한국전자통신연구원 광통신연구부)
  • Published : 2002.10.01
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Abstract

A simple optical signal to noise ratio monitoring method using fiber Bragg grating is proposed for monitoring performance of OADM. OSNR of each channel is determined by monitoring the optical power transmitted and reflected from fiber Bragg gratings, simultaneously. We have obtained OSNR with accuracy better than 0.8㏈ compared with OSA of 0.1nm optical resolution in the wide input power range between -6 ㏈m and -23㏈m per channel.

본 논문에서는 광섬유 브래그 격자를 이용하여 광 분기 결합기(Optical add/drop mutiplexer)의 성능을 감시하기 위해서 다 채널 광신호의 채널별 광신호 대 잡음비를 실시간으로 측정하였다. 광 분기 결합기에 입력되는 다 채널 광신호의 채널별 세기가 -6 ㏈m에서 -23㏈m 까지 변화할 경우 채널별 광신호 대 잡음비는 0.1 ㎜의 분해능을 가지는 광 스펙트럼 분석기 (Optical spectrum analyzer)와 비교해서 0.8㏈ 오차 이내로 측정되었다.

Keywords

References

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