| 摘要 |
The gain characteristic of a distributed Raman amplifier (RA) is controlled by estimating its gain curve in ± simulation, selecting N P data channels (» 1 , » 2 , » 3 ) for an online measurement and determining target gain values for the selected channels from the simulated gain curve (24). The number of selected channels corresponds to the number of pump wavelengths (» P1 , » P2 , » P3 ). A controller (CTR) varies the power of at least one of the pump light signals (» 1 , » 2 , » 3 ) to minimize ± power difference between the measured power value of any of the N P signal channels and its estimated target gain value.
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