Patent ID: 7911684
Filing Date: 2011-03-22
Classification: H04B

Abstract:
1. A variable gain optical amplifier comprising: a first erbium doped fiber configured to receive an input optical signal; a second erbium doped fiber configured to output an output optical signal; a gain flattening filter positioned between the first erbium doped fiber and the second erbium doped fiber; a pump laser configured to provide energy to the first erbium doped fiber and the second erbium doped fiber; a thermo electric cooler configured to control a temperature of one or more of the first erbium doped fiber and the second erbium doped fiber; and a controller configured to adjust an output from the pump laser and a temperature of at least one of the first erbium doped fiber and the second erbium doped fiber to provide a variable flat spectral gain output.