Abstract
This paper presents an application of control theory towards suppressing cross-gain modulation effects in erbium doped fiber amplifiers (EDFAs). These effects arise due to sudden input power changes at network reconfiguration or system faults. An extended nonlinear model of the EDFA is derived, including amplified spontaneous emission (ASE). Two novel EDFA control applications are developed and compared: one based on L 2 nonlinear control and the other based on optimized gain scheduling. The design of each control law is subject to realistic physical constraints as encountered in industrial application.
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