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

The Institute of Electronics and Information Engineers (대한전자공학회)
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Loop-back System Using Mach-Zehnder Modulator

Mach-Zehnder 변조기를 이용한 Loop-back System

  • Kim, Hui-Ju (Dept.of Electronics Information Engineering, Chonbuk National University) ;
  • Gang, Dong-Seong (Dept.of Electronics Information Engineering, Chonbuk National University) ;
  • Jeon, Geum-Su (Dept.of Electronics Information Engineering, Chonbuk National University) ;
  • Ban, Jae-Gyeong (Dept.of Electronics Information Engineering, Chonbuk National University)
  • 김희주 (전북대학교 전자정보공학부) ;
  • 강동성 (전북대학교 전자정보공학부) ;
  • 전금수 (전북대학교 전자정보공학부) ;
  • 반재경 (전북대학교 전자정보공학부)
  • Published : 2001.07.01
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Abstract

In this paper, we propose optical subcarrier mutiplexing(SCM) transceiver module for base station(BS) that has no optical source and can be used for full-duplex communication over single optical fiber. In this method we retransmit optical modulated signal to the central office(CO) using loop-back system with a ring type Mach-Zehnder modulator(MZM) in BS, where optical source is transmitted from the CO. We have modeled the ring type MZM and were conformed that the measured results were in good agreement with the modeling. In the ring type MZM, the optical symmetric position of the MZM is very important in RF signal transmission.

본 논문에서는 광원이 불필요하며 단일 광섬유를 통하여 양방향 전송이 가능한 BS(base station)용 광송 수신기 모듈을 제안한다. 본 논문에서 제안하는 방식에서는 BS의 송신단에서 Ring type으로 구성된 Mach-Zehnder 변조기의 양방향 변조를 이용하여 CO(central office)에서 제공된 광원을 변조하여 다시 CO로 전송한다. Ring 타입으로 구성된 변조기의 등가모델을 도출하였으며, 등가모델과 측정결과가 매우 잘 일치함을 확인할 수 있었다. 또한 Ring type에서 Mach-Zehnder 변조기의 광학적인 대칭이 RF 신호 전송 특성에 중요한 영향을 미침을 확인할 수 있었다.

Keywords

References

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