Patent ID: 6304371
Filing Date: 2001-10-16
Classification: H01S,H04B

Abstract:
An optical amplifier comprising:a first pumping light source emitting a first pumping light;a first optical fiber amplifier amplifying input light in accordance with the first pumping light input to the first optical fiber amplifier from an opposite side of the input light;a optical splitter splitting an output light of the first optical amplifier;a monitor optically connected to the optical splitter and monitoring power of the output light from the first optical fiber amplifier;a second pumping light source emitting a second pumping light;a second optical fiber amplifier optically connected to the optical splitter and amplifying the output light of the first optical amplifier in accordance with the second pumping light from the second pumping light source; anda controller controlling output power of the first pumping light source based on the power monitored by the monitor.