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Configuration of ETDM 20 Gb/s optical transmitter / receiver and their characteristics

전기적 시분할 다중 방식을 이용한 20 Gb/s 광송,수신기의 제작 및 성능 평가

  • Lim, Sang-Kyu (Optical Communications Department, Electronics and Telecommunications Research Institute) ;
  • Cho, Hyun-Woo (Optical Communications Department, Electronics and Telecommunications Research Institute) ;
  • Lyu, Gap-Youl (Optical Communications Department, Electronics and Telecommunications Research Institute) ;
  • Lee, Jong-Hyun (Optical Communications Department, Electronics and Telecommunications Research Institute)
  • 임상규 (한국전자통신연구원 광통신연구부) ;
  • 조현우 (한국전자통신연구원 광통신연구부) ;
  • 류갑열 (한국전자통신연구원 광통신연구부) ;
  • 이종현 (한국전자통신연구원 광통신연구부)
  • Published : 2002.08.01

Abstract

We developed an optical transmitter and receiver for an electrical time division multiplexed (ETDM) 20 Gb/s optical transmission system, and experimentally investigated their characteristics. Especially, the clock extraction circuit, which is a key component in realizing broadband optical transmission receivers, was realized by using an NRZ-to-PRZ converter implemented with a half-period delay line and an EX-OR, a high-Q bandpass filter using a cylindrical dielectric resonator, and a microstrip coupled-line bandpass filter. Finally, the bit-error-rate of demultiplexed 10 Gb/s electrical signal after back to-back transmission was measured, and a high receiver sensitivity [-26.2 dBm for NRZ ($2^{7}-1$) pseudorandom binary sequence (PRBS)] was obtained

20 Gb/s 광 전송 시스템을 위한 광 송신기와 수신기를 전기적 시분할 다중 방식으로 제작하고 그 특성을 측정하였다. 특히 광 수신기의 핵심 회로인 클럭(19.906㎓) 추출 회로의 구현을 위해 반파장 지연 선로와 상용화된 EX-OR 소자를 이용한 NRZ-PRZ 변환기와 유전체 공진기를 이용한 협대역 대역통과 필터 및 마이크로스트립 대역통과 필터를 설계, 제작하였으며, 최종적으로 수신부에서 1:2로 역다중화된 10 Gb/s 신호의 비트 오율(BER)을 측정하였다. 제작된 송ㆍ수신기를 직접 연동하였을 때, 수신기의 수신 감도는 BER $1{\times}10^{-12}$에서 -26.2dBm을 나타내었다.

Keywords

References

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