Abstract
In frequency-division-multiplexed (FDM) or packet-switched systems, the input power of erbium-doped fiber amplifiers (EDFA's) can vary as slowly as the dynamic gain of EDFA’s, thus causing a saturation-induced power penalty.1,2 Various methods for the compensation of transient gain saturation based on pump feedforward,1 pump feedback,3 and signal feedback4 have been reported. In this paper we describe a method of transient gain control in an EDFA based on a novel scheme for pump feedback loops. We also investigate theoretically the dynamic response of the control loop to square-input signal pulses.
© 1993 Optical Society of America
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