Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Narrowband Modulation Response Enhancement Using a Dual-Electrode Distributed Feedback Laser Integrated With an Electro-Absorption Modulator

전계 흡수 변조기가 집적된 다중 전극 분포 궤환형 레이저를 이용한 광신호의 협대역 변조 응답 향상

  • Cho, Jun-Hyung (School of Electronic and Electrical Engineering, College of Engineering, Hongik University) ;
  • Heo, Seo-Weon (School of Electronic and Electrical Engineering, College of Engineering, Hongik University) ;
  • Sung, Hyuk-Kee (School of Electronic and Electrical Engineering, College of Engineering, Hongik University)
  • Received : 2013.07.25
  • Accepted : 2013.08.16
  • Published : 2013.08.31
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Abstract

We present the enhancement of narrowband modulation response of an optical source by integrating a dual-electrode distributed feedback (DFB) laser with an electro-absorption modulator (EAM). The dual-electrode DFB laser exhibits a multiple optical modes owing to a self-pulsation in GHz range. By modulating the laser and modulator sections of the integrated device simultaneously, 20-dB of narrowband modulation response enhancement at 6 GHz with 7-GHz tuning range has been observed.

전계 흡수 변조기가 집적된 이중 전극 분포 궤환형 레이저를 사용하여 광신호의 변조 응답 향상을 실현하였다. 이 중 전극 구조의 분포 궤환형 반도체 레이저는 자려 펄스 발진 현상으로 인해 수 기가 헤르쯔의 모드 간격을 가진 다중 광모드 발진 현상을 보인다. 이 현상을 이용하여 RF 신호에 대한 광원의 변조 특성을 6 GHz 변조 신호에 대하여 약 20 dB 향상 시켰으며, 이러한 변조 성능 향상에 대하여 7 GHz의 주파수 가변 영역을 얻었다.

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References

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