| 摘要 |
A method and apparatus for amplifying an optical signal includes an amplification scheme that combines Raman amplification (RA) with a semiconductor optical amplifier (SOA) to achieve a wider bandwidth, flatter gain spectrum, and higher gain than either RA or SOA is able to achieve independently. The SOA is typically a conventional SOA selected to have a negatively sloped response, whereas the RA stage typically includes a distributed Raman amplifier pumped with a wavelength and power so as to have a positively sloped response. In the preferred embodiment, SOA precedes the RA stage to improve the signal-to-noise ratio.
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