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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 24,
  • Issue 5,
  • pp. 2190-
  • (2006)

Transient Analysis of Short, High-Concentration, Gain-Clamped Er3+-Yb3+ Codoped Fiber Amplifiers

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Abstract

A theoretical study of the dynamics of short high-concentration gain-clamped Er3+-Yb3+ codoped fiber amplifiers is presented. The effect of various parameters on the transient power excursions and relaxation oscillation frequency of a given signal input channel when other signal channels are added or dropped from an initial steady-state configuration is analyzed. In particular, the effects of Er3+ clustering, Yb3+ concentration, fiber length, lasing wavelength, pump wavelength, pump power, and cavity losses are shown. The numerical results demonstrate the importance of Yb3+ sensitization in achieving stable gain-clamped operation in a range of operating conditions. It is shown that the amplitude of power excursions is typically small, e.g., less than 0.1 dB, provided that the amount of Er3+ ions in the clusters is kept small.

© 2006 IEEE

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