Abstract

A new design of all-optical gain-clamped L-band double-pass (DP) erbium-doped fiber amplifier (EDFA) has been proposed and demonstrated, in which the input port and the odd-channel output port of an interleaver are connected with the DP configuration EDF through a circulator to form lasing ring cavity for clamping gain, and the even port is utilized to export the amplified signals. The low noise figure can be achieved because the lasing power copropagates with the signals, and it is exported separately from the amplified signal thanks to interleaver. Meanwhile, the fiber Bragg grating incorporated in DP configuration suppresses the backward amplified spontaneous emission generation, and therefore improves efficiently the gain and lowers the noise figure. In such a way, the clamped gain of 16.3 dB with a variation below 0.2 dB and noise figure below 5 dB are achieved in the new L-band all-optical gain-clamped EDFA.

© 2005 IEEE

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  1. M. Yamada, H. Ono, T. Kananori, S. Sudo and Y. Ohishi, "Broadband and gain flattened amplifier composed of a 1.55 µ m-band and a 1.58 µ m-band3 Er+ -doped fiber amplifier in a parallel configuration", Electron. Lett., vol. 33, no. 8, pp. 710-711, 1997.
  2. Y. Sun, et al. "80 nm ultra-wide-band erbium-doped silica fiber amplifier", Electron. Lett., vol. 33, no. 23, pp. 1965-1967, 1997.
  3. A. R. Pratt, K. Fujii and Y. Ozeki, "Gain control in L-band EDFA by monitoring backward traveling C-band ASE", IEEE Photon. Technol. Lett., vol. 8, pp. 983-985, 2000.
  4. J. T. Ahn and K. H. Kim, "All optical gain-clamped erbium-doped fiber amplifier with improved noise figure and freedom from relaxation oscillation", IEEE Photon. Technol. Lett., vol. 16, pp. 84-86, Jan. 2004.
  5. S. Y. Ko, et al. "Gain control in erbium-doped fiber amplifiers by tuning centre wavelength of a fiber Bragg grating constituting resonant cavity", Electron. Lett., vol. 34, pp. 990-991, May 1998.
  6. N. E. Jolley, F. Davis and J. Mun, "A Bragg grating optically gain-clamped EDFA with adjustable gain noise figure and low multipath interference", in OFC'98 Tech. Dig., 1998, pp. 139-140.
  7. M. Zringibl, "Gain control in erbium-doped fiber amplifiers by an all-optical feedback loop", Electron. Lett., vol. 27, pp. 560-561, 1991.
  8. M. Artiglia, A. Pagano and B. Sordo, "Gain-shifted EDFA with all-optical automatic gain control", in ECOC'98, 1998, pp. 293-294.
  9. L. L. Yi, L. Zhan, Q. H. Ye, X. Hu and Y. X. Xia, "Gain-clamped Erbium-doped fiber-ring lasing amplifier with low noise figure by using an interleaver", IEEE Photon. Technol. Lett., vol. 15, pp. 1695-1697, Dec. 2003.
  10. J. Nilsson, S. Y. Yun, S. T. Hwang, J. M. Kim and S. J. Kim, "Long wavelength erbium-doped fiber amplifier gain enhanced by ASE end-reflectors", IEEE Photon. Technol. Lett., vol. 10, pp. 1551-1553, Nov. 1998.
  11. Y. Zhang, et al. "Wavelength and power dependence of injected C-band laser on pump conversion efficiency", IEEE Photon. Technol. Lett., vol. 14, pp. 290-292, Mar. 2002.
  12. S. W. Harun, P. Poopalan and H. Ahmad, "Gain enhancement in L-band EDFA through a double-pass technique", IEEE Photon. Technol. Lett., vol. 14, pp. 296 -297, Mar. 2002.
  13. L. L. Yi, L. Zhan, J. H. Ji, Q. H. Ye and Y. X. Xia, "Improvement of gain and noise figure in double-pass L-band EDFA by incorporating a fiber Bragg grating", IEEE Photon. Technol. Lett., vol. 16, pp. 1005-1007, Apr. 2004.
  14. M. Cai, X. Liu, J. Cui, P. Tang, D. Liu and J. Peng, "Study on noise characteristic of gain-clamped erbium-doped fiber-ring lasing amplifier", IEEE Photo. Technol. Lett., vol. 9, pp. 1093-1095, Aug. 1997.
  15. T. C. Teyo, M. K. Leong and H. Ahmad, "Lasing wavelength dependence of gain-clamped EDFA performance with different optical feedback schemes", Opt. Laser Technol., pp. 497-500, 2002.

Other

M. Yamada, H. Ono, T. Kananori, S. Sudo and Y. Ohishi, "Broadband and gain flattened amplifier composed of a 1.55 µ m-band and a 1.58 µ m-band3 Er+ -doped fiber amplifier in a parallel configuration", Electron. Lett., vol. 33, no. 8, pp. 710-711, 1997.

Y. Sun, et al. "80 nm ultra-wide-band erbium-doped silica fiber amplifier", Electron. Lett., vol. 33, no. 23, pp. 1965-1967, 1997.

A. R. Pratt, K. Fujii and Y. Ozeki, "Gain control in L-band EDFA by monitoring backward traveling C-band ASE", IEEE Photon. Technol. Lett., vol. 8, pp. 983-985, 2000.

J. T. Ahn and K. H. Kim, "All optical gain-clamped erbium-doped fiber amplifier with improved noise figure and freedom from relaxation oscillation", IEEE Photon. Technol. Lett., vol. 16, pp. 84-86, Jan. 2004.

S. Y. Ko, et al. "Gain control in erbium-doped fiber amplifiers by tuning centre wavelength of a fiber Bragg grating constituting resonant cavity", Electron. Lett., vol. 34, pp. 990-991, May 1998.

N. E. Jolley, F. Davis and J. Mun, "A Bragg grating optically gain-clamped EDFA with adjustable gain noise figure and low multipath interference", in OFC'98 Tech. Dig., 1998, pp. 139-140.

M. Zringibl, "Gain control in erbium-doped fiber amplifiers by an all-optical feedback loop", Electron. Lett., vol. 27, pp. 560-561, 1991.

M. Artiglia, A. Pagano and B. Sordo, "Gain-shifted EDFA with all-optical automatic gain control", in ECOC'98, 1998, pp. 293-294.

L. L. Yi, L. Zhan, Q. H. Ye, X. Hu and Y. X. Xia, "Gain-clamped Erbium-doped fiber-ring lasing amplifier with low noise figure by using an interleaver", IEEE Photon. Technol. Lett., vol. 15, pp. 1695-1697, Dec. 2003.

J. Nilsson, S. Y. Yun, S. T. Hwang, J. M. Kim and S. J. Kim, "Long wavelength erbium-doped fiber amplifier gain enhanced by ASE end-reflectors", IEEE Photon. Technol. Lett., vol. 10, pp. 1551-1553, Nov. 1998.

Y. Zhang, et al. "Wavelength and power dependence of injected C-band laser on pump conversion efficiency", IEEE Photon. Technol. Lett., vol. 14, pp. 290-292, Mar. 2002.

S. W. Harun, P. Poopalan and H. Ahmad, "Gain enhancement in L-band EDFA through a double-pass technique", IEEE Photon. Technol. Lett., vol. 14, pp. 296 -297, Mar. 2002.

L. L. Yi, L. Zhan, J. H. Ji, Q. H. Ye and Y. X. Xia, "Improvement of gain and noise figure in double-pass L-band EDFA by incorporating a fiber Bragg grating", IEEE Photon. Technol. Lett., vol. 16, pp. 1005-1007, Apr. 2004.

M. Cai, X. Liu, J. Cui, P. Tang, D. Liu and J. Peng, "Study on noise characteristic of gain-clamped erbium-doped fiber-ring lasing amplifier", IEEE Photo. Technol. Lett., vol. 9, pp. 1093-1095, Aug. 1997.

T. C. Teyo, M. K. Leong and H. Ahmad, "Lasing wavelength dependence of gain-clamped EDFA performance with different optical feedback schemes", Opt. Laser Technol., pp. 497-500, 2002.

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