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Gain control in EDFA's by pump compensation

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3 Author(s)
Tancevski, L. ; Corp. Res. Center, Alcatel Network Syst., Richardson, TX, USA ; Rusch, L.A. ; Bononi, A.

Gain control by means of pump compensation in cascades of erbium-doped fiber amplifiers (EDFAs) is analyzed. Based on analytical expressions for the 1-dB rise/fall time for the case of channels add/drop, required pump power changes at each amplifier are derived in the form of simple closed expressions. Numerical simulations of a system comprising 20 wavelength division-multiplexed channels transmitted through a cascade of 35 EDFAs are performed demonstrating the effectiveness of the gain control.

Published in:

Photonics Technology Letters, IEEE  (Volume:10 ,  Issue: 9 )