Optical amplifier and optical transmission system using same
AssigneeSumitomo Electric Industries, Ltd.
InventorsShinji Endo, Motoki Kakui
Life of this patent
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Abstract
Disclosed are an optical amplifier and an optical transmission system using the same in which not only can the dispersion of optical waveguide paths for optical amplification be easily and sufficiently compensated, but also the 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 signal light with the pump light, and having dispersion different from each other in sign, and being connected together in series, and two pump light sources 11 and 12 for supplying pump light to them.
Claims13
A modularized optical amplifier for use in an optical transmission system, the modularized optical amplifier comprising
- at least one positive dispersion optical waveguide path having a positive dispersion at the wavelength of 1580 nm,
- at least one negative dispersion optical waveguide path having a negative dispersion at the wavelength of 1580 nm, and
- one or more exciting means for supplying pump light to each of said at least one positive dispersion optical waveguide path and at least one negative dispersion optical waveguide path,
- wherein the cutoff wavelength of said at least one positive dispersion optical waveguide path is equal to or more than 1300 nm,
- the cutoff wavelength of said at least one negative dispersion optical waveguide path is equal to or less than 980 nm, and
- said at least one positive dispersion optical waveguide path and said at least one negative dispersion optical waveguide path are connected together in series and doped with a fluorescent material to optically amplify signal light by pump light.
Dependencies are inferred from the claim text.