| 摘要 |
PROBLEM TO BE SOLVED: To reduce in the size of an optical amplifier system and reduce costs by reducing the number of components of the optical amplifier system which is comprised of a number of optical components.SOLUTION: An optical amplifier system comprises a plurality of optical amplifiers 31 for amplifying an optical signal in each path branched by a splitter 11d for transferring to other paths in a drop-side WXC provided in a ROADM node 101, an exciting light source 34 which supplies exciting light to the plurality of optical amplifiers 31, an exciting light distribution circuit 71 which distributes the exciting light outputted from the exciting light source 34 to the plurality of optical amplifiers 31, a signal strength monitor 32 which measures a signal strength of an optical signal amplified by one of the optical amplifiers 31, and a gain control circuit 75 which changes output intensity of the exciting light source 34 in accordance with the signal strength measured by the signal strength monitor 32. |
