Optical amplification system or group employing multiple pump laser groupings

摘要

An optical amplification system is described. The system includes a series of optical amplifier groups optically connected in series. Each optical amplifier group comprising multiple optical amplifiers. The optical amplifiers of a particular amplifier group each produces pump radiation having a different set of pump wavelengths and pump powers corresponding to the respective pump wavelengths. Each amplifier group provides a desired gain profile, such as a substantially flat gain profile, over a first range of optical signal wavelengths.