Patent ID: 6304370
Filing Date: 2001-10-16
Classification: H04B,H04J

Abstract:
A modular unidirectional fiber amplifier for a wide-band optical signal transporting a plurality of first band transmission channels and a plurality of second band transmission channels, said modular fiber amplifier comprising:a first gain stage for receiving said wide-band optical signal and passing through said second-band transmission channels and providing a first-band amplified version of said first-band transmission channels;means for separating said first-band amplified version from said second-band transmission channels;a second gain stage connected in series with said first gain stage for receiving said second-band transmission channels and providing a second-band amplified version of said second-band transmission channels;means for combining said first-band amplified version and said second-band amplified version; andby-pass means, connected in parallel to said second gain stage, for routing said first-band amplified version from said means for separating to said means for combining.