Patent ID: 6927897
Filing Date: 2005-08-09
Classification: H01S,H04B,H04J

Abstract:
1. An optical amplifier for amplifying and outputting inputted signal light comprising: a first optical amplifying fiber amplifying and outputting said signal light; a characteristic compensation unit for compensating a characteristic of said signal light outputted from said first optical amplifying fiber; a second optical amplifying fiber amplifying and outputting said signal light outputted from said characteristic compensation unit; a pumping light source for outputting pumping light used for amplifying said signal light in said first optical amplifying fiber and said second optical amplifying fiber; a first wavelength unit for at least one of multiplexing and demultiplexing for combining said signal light outputted from said second optical amplifying fiber to said pumping light outputted from said pumping light source in a backward direction to a propagation direction of said signal light; and a second wavelength unit for at least one of multiplexing and demultiplexing for separating said signal light from said first optical amplifying fiber and said pumping light from said second optical amplifying fiber, for supplying said signal light separated into said characteristic compensation unit, for supplying said pumping light separated into said first optical amplifying fiber, and for combining said signal light passing through said characteristic compensation unit to said pumping light from said second optical amplifying fiber in a backward direction to a propagation direction of said pumping light.