Method for controlling an erbium doped fibre amplifier (EDFA) and amplifier arrangement

摘要

The invention refers to a method for operating an amplifier with a first amplifier stage (A1) and a second amplifier stage (A2), pumped by a single pump light source (11) generating a primary pump signal (SPUMP), which is split into first pump signal (S1) and a second pump signal (S2) according to a variable splitting factor (α) for pumping the first amplifier stage (A1) and the second amplifier stage (A2) respectively. The splitting factor (α) is varied to achieve an optimized noise figure.