OPTICAL AMPLIFIER AND OPTICAL TRANSMISSION SYSTEM USING SAME

摘要

Disclosed are an optical amplifier and an optical transmission system using the same in which not only can the dispersion of optical waveguide pat hs for optical amplification be easily and sufficiently compensated, but also t he waveform degradation of signal light can be restrained. An optical amplifier according to one embodiment of the present invention comprises at least two erbium-doped fibers 10 and 20, having erbium doped to optically amplify sign al light with the pump light, and having dispersion different from each other i n sign, and being connected together in series, and two pump light sources 11 and 12 for supplying pump light to them.