Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Stabilization and characterization of a 10 GHz harmonically mode-locked Er-doped fiber ring laser by suppression of relaxation oscillation

완화진동억압을 이용한 10 GHz 고조모드잠금된 고리형 어븀첨가 광섬유 레이저의 출력 안정화 및 특성 측정

  • 장지웅 (한국과학기술연구원 광기술연구센터) ;
  • 이유승 (한국과학기술연구원 광기술연구센터) ;
  • 전영민 (한국과학기술연구원 광기술연구센터) ;
  • 임동건 (고려대학교 물리학과 양자광학실)
  • Published : 2002.02.01
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Abstract

Using Mach-Zehnder type intensity modulator, we stabilized a 10 GHz harmonically mode-locked dispersion-compensated fiber ring laser using a feedback controlling system, and we measured its stability. The laser was stabilized for more than 16 hours by controlling the cavity length to suppress the relaxation oscillation frequency component which had caused the laser output instability. The ms timing jitter and ms amplitude noise were measured to be 260-524 fsec and 4~11.5%, respectively, and BER test measurement showed a value of 10$^{-13}$ .

마하젠더형 광세기 변조기를 이용하여 l0 GHz 고조모드잠금된 분산보상 어븀첨가 광섬유 레이저의 출력 안정화 되먹임 제어를 하고 출력의 안정도를 측정하였다. 레이저의 출력 불안정성이 발생하였을 때 나타나는 완화진동 주파수 성분을 억압하도록 공진기 길이를 조정하여 16시간 이상 출력 안정화를 시켰다. 이때, 안정화가 진행되는 동안 rms 위상잡음과 rms진폭잡음은 각각 260 fsec-524 fsec와 4-11.5%의 사이에 분포하였고, BER은 $10^{-13}$ 으로 측정되었다.

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References

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