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Transient Performance of Erbium-doped Fiber Amplifiers using a New Feedforward Control taking into account Wavelength Dependence by Lutz Rapp is a Engineering article available to read on EtoBox.

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Fast electronic control architectures are currently the most economical solution to stabilize the gain of erbiumdoped fiber amplifiers (EDFAs). Commonly, feedback architectures are used since they allow to adjust the gain or output power to given target values and to compensate for control errors. However, purely feedback based controllers cannot meet the transient performance requirements for dynamically reconfigured networks. If improved transient performance is needed, a feedforward controller is added. However, state of the art implementations cannot achieve optimum performance since they do not take into account the shape of the input spectrum. In this paper, transient performance achieved with a new approach is investigated. Optimum transient performance is obtained by taking into account the wavelength dependence of the required pump power without incorporating additional hardware in the EDFA design. The basic principle behind the approach is explained and limiting effects are pointed out. In particular, the impact of transition times and sampling rates of digital signal processors are investigated. In addition, different aspects of the implementation are considered and the

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Author

Lutz Rapp

Publisher

Walter de Gruyter GmbH

Published

2007

Language

EN

Field

Engineering (Physical Sciences)