| 摘要 |
An optical amplifier apparatus, for amplifying inputted multiplexed optical signals, comprising: optical adjusting means for adjusting the inputted multiplexed optical signals in optical power thereof with a certain characteristic of gain; optical amplifying means for amplifying the optical power of the adjusted multiplexed optical signals with a characteristic of gain which is reversed to that of said adjusting means; optical splitting means for splitting a part of the amplified multiplexed optical signals as an output optical signal and for splitting another part thereof as a detection optical signal; optical signal detecting means for inputting said detection optical signal which is split; and a controller apparatus for controlling said adjusting means and said optical amplifying means upon an output from said optical signal detecting means, wherein an output gain characteristic in the optical power of said optical amplifying means is flatten at a predetermined value.
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