Patent ID: 6771854
Filing Date: 2004-08-03
Classification: G02B,H04B,H04J

Abstract:
An optical transmission unit comprising:a first optical amplifier which amplifies a first wavelength-multiplexed signal light; a first optical branching filter which receives the first wavelength-multiplexed signal light outputted by said first optical amplifier and splits the received first wavelength-multiplexed signal light into a second wavelength-multiplexed signal light and a third wavelength-multiplexed signal light; a dispersion compensator which compensates dispersion of the third wavelength-multiplexed signal light; a second optical branching filter which splits the third wavelength-multiplexed signal light whose dispersion has been compensated by said dispersion compensator into individual wavelength signal lights; and an optical coupler which couples the second wavelength-multiplexed signal light and at least one of the individual wavelength signal lights outputted by the second optical branching filter.