| 摘要 |
<p>A multi-stage Raman amplifier (100) includes a first Raman amplifier stage (120) having a first sloped gain profile (30) operable to amplify a plurality of signal wavelengths (116), and a second Raman amplifier stage (121) having a second sloped gain profile (40) operable to amplify at least most of the plurality of signal wavelengths after those wavelengths have been amplified by the first stage. The second sloped gain profile is approximately complementary slope to the slope of the first sloped gain profile. The combined effect of the first and second Raman stages contributes to an approximately flat overall gain profile (50) over the plurality of signal wavelengths.</p> |
