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Gain-flattened EDFA with high Al concentration for multistage repeatered WDM transmission systems

Gain-flattened EDFA with high Al concentration for multistage repeatered WDM transmission systems

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EDFAs with high Al concentrations are optimised for wavelength division multiplexed (WDM) transmission systems. Gain excursion is succesfully suppressed to within 0.02 dB/nm/stage for the six-stage common amplification of WDM signals ranging from 1545 to 1557 nm. This result shows the possibility of multistage repeatered WDM transmission without gain equalisation.

Inspec keywords: wavelength division multiplexing; aluminium; optical fibre communication; optical repeaters; erbium; fibre lasers

Other keywords: multistage repeatered WDM transmission; gain excursion; wavelength division multiplexing; Er3+,Al-doped fibre amplifier; six-stage common amplification; gain-flattened EDFA; 1545 to 1557 nm

Subjects: Switching centres and equipment; Optical communication; Fibre lasers and amplifiers

References

    1. 1)
      • K. Inoue , T. Kominato , H. Toba . Tunable gain equalization using a Mach Zehnder optical filter in multistagefiber amplifiers. IEEE Photonics Technol. Lett. , 718 - 720
    2. 2)
      • A.R. Chraplyvy , J.A. Nagel , R.W. Tkach . Equalization in amplified WDM lightwave transmission systems. IEEE Photonics Technol. Lett. , 920 - 922
    3. 3)
      • M.A. Ali , A.F. Elrefaie , R.E. Wagner , S.A. Ahmed . Performance of erbium doped fiber amplifier cascades in multiple accesslightwave networks. IEEE Photonics Technol. Lett. , 1142 - 1145
    4. 4)
      • Kashiwada, T., Nakazato, K., Ohnishi, M., Kanamori, H., Nishimura, M.: `Spectral gain behaviour of Er-doped fiber with extremely high aluminiumconcentration', MA6-1, OAA'93, 1993, p. 104.
    5. 5)
      • Betts, R.A., Frisken, S.J., Wong, D.: `Split-beam Fourier filter and its application in a gain-flattened EDFA', TuP4, OFC'95, 1995, p. 80.
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