Abstract
Power transients in optical networks impose challenging requirements on the design and control of optical
amplifiers. In addition, reducing amplifier cost has become mandatory. Therefore, setups using a single pump to
supply pump power to several coils of erbium-doped fibers (EDFS) have become attractive. In most cases, the
so-called pump bypass technique is employed, but pump power splitting also constitutes a favorable solution. Both
techniques are compared with respect to their transient behavior. The investigations focus on the characteristics of
the optical setup representing the control path. Appropriate scenarios are considered to take into account the
influence of feedforward and feedback control techniques. Simulation results reveal that the pump power splitting
approach is favorable with respect to a feedback control, whereas there are no significant differences with respect
to feedforward approaches.
© 2007 IEEE
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