Patent ID: 7006281
Filing Date: 2006-02-28
Classification: H04B,H04J

Abstract:
1. In a WDM communication system carrying a plurality of WDM channels, apparatus for amplifying a plurality of optical signals, said apparatus comprising: a first group of variable gain optical amplifiers, each of said first group of amplifiers amplifying a corresponding one of a first group of adjacent WDM channels, said first group of amplifiers receiving pump energy from a first optical energy source; a second group of variable gain optical amplifiers, each of said second group of amplifiers amplifying a corresponding one of a second group of adjacent WDM channels, said second group of amplifiers receiving pump energy from a second optical energy source; and wherein an output power of at least one of said first optical energy source or said second optical energy source is adjusted to provide equalization to at least one of said first group or second group of WDM channels.