Patent ID: 6091540
Filing Date: 2000-07-18
Classification: H01S,H04B,H04J

Abstract:
An optical amplifier which amplifies a signal light, comprising:a pumping light source which outputs a pumping light;a first wavelength multiplexer which multiplexes the signal light and the pumping light and provides a multiplexed light;a first doped fiber which receives the multiplexed light from the first wavelength multiplexer and which amplifies the signal light;a wavelength demultiplexer which receives the multiplexed light from the first doped fiber and which separately outputs the amplified signal light and the pumping light;an optical component which receives the amplified signal light from the demultiplexer and which attenuates the amplified signal light;a second wavelength multiplexer which multiplexes the attenuated signal light received from the optical component and the demultiplexed pumping light received from the wavelength demultiplexer; anda second doped fiber which amplifies the attenuated signal light.