The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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The Characteristics of Transient Response According to Lasing Wavelengths and Propagation Directions in Double-Pass Gain-Clamped L-band EDFA with Linear Cavity

이중경로증폭 선형공진 고정이득 L-band EDFA에서 발진 파장 및 방향에 따른 과도응답 특성

  • 김익상 (배재대학교 정보통신공학과 전파응용연구실)
  • Published : 2006.06.01
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Abstract

We implemented DPU(Double-Pass Gain-Clamped) L-band EDFA for highly efficient amplification. A lasing signal generated within the linear cavity, can minimize the fluctuation of surviving channels when several WDM(Wavelength Division Multiplexing) channels are added or dropped. The new method measuring the characteristics of transient response of surviving channels quantitatively is suggested. It is to measure the ratio of lasing output before add or drop to that after add or drop. We investigated dynamic characteristics by using this method according to lasing wavelengths and propagation directions within the cavity. Experimental measurements show that the short lasing wavelength and backward propagation direction is the best condition for small fluctuation of surviving channels.

본 논문에서는 고효율 증폭 기능을 가지는 이중경로증폭 구조의 고정이득 L-band EDFA를 구현하였다. 선형공진기로부터 생성된 발진광에 의해 신호채널들이 분기결합 되더라도 잔류채널의 요동을 줄일 수 있다. 잔류채널의 과도응답 특성에 대해 발진출력광 변화율이라는 정량적인 척도를 제시하였고 이를 이용해 발진파장 및 발진방향에 따른 과도응답 특성을 측정하였다. 결과적으로 단파장 및 펌프광의 반대 방향으로 전파하는 후방 발진광이 가장 양호한 것으로 판명되었다.

Keywords

References

  1. S. Yamachida and M. Nishihara 'L-band Erbium-Doped Fiber Amplifier Incorporating an Inline Fiber Grating Laser', IEEE J. of Selected Topics in Quantum Electronics, vol. 07, No. 1, pp.44-48, 2001 https://doi.org/10.1109/2944.924008
  2. D. H. Ricards, J. L. Jackel, and M. A. Ali, 'A Theoretical Investigation of Dynamic All-Optical Automatic Gain Contol in Multichannel EDFA's and EDFA Cascades', IEEE J. of Selected Topics in Quantum Electronics, vol. 3, No. 4, pp. 1027-1036, 1997 https://doi.org/10.1109/2944.649534
  3. J. C. Lee, H. S. Chung, W. Y. Oh, and M. J. Chu, 'The wavelength dependent transient effect in surviving channels in L-band EDFA', OFC 2002, pp. 646-647, 2002
  4. D. Gurkan, M. I. Hayee, and A. E. Willner, 'Transient behavior of L-band and C-band EDFAs in an add/drop multiplexed 40-channel WDM network', CLEO 2001, pp. 415-416, 2001
  5. B. Xia, D. Pudo, and L. R. Chen, 'Comparison of the static and dynamic properties of single- and double- pass partially gain-clamped two-stage L-band EDFAs', IEEE Photon. Technol. Lett., vol. 15, no. 4, pp. 519-521, 2003 https://doi.org/10.1109/LPT.2003.809294
  6. S. W. Harun, N. Tamchek, P. Poopalan, and H. Ahmad, 'Double-Pass L-Band EDFA With Enhanced Noise Figure Characteristics', IEEE Photon. Technol. Lett., vol. 15, no. 8, pp. 1055-1057, AUGUST 2003 https://doi.org/10.1109/LPT.2003.815342
  7. S. W. Harun, and H. Ahmad, 'Double-Pass L-Band EDFA Incorporating Band Pass Filter' ICSE 2002 pp.391-393, 2002, Penang Malaysia
  8. 김익상, 김창봉, 양홍, 손영호 '양방향 펌프구조 고정이득 L-band EDFA의 과도응답 특성', 한국통신학회논문지, 제30권, 3A호, pp.160-167, 2005