Control scheme for long wavelength channels in wideband WDM optical fiber transmission system
AssigneeFujitsu Limited
InventorsRainer Hainberger, Takafumi Terahara
Life of this patent
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Abstract
There is provided in an optical amplifier device used for a system in which a power transfer takes place from comparatively short wavelength signal to a comparatively long wavelength signal. The device includes an amplifier stage coupled to an optical transmission medium, a monitor monitoring a status of a first band; and a pump light source unit supplying at least one first pump light to the optical transmission medium on the basis of the status of the first band monitored, so that the above at least one first pump light supplies additional power to longer wavelength channels related to the status of the first band.
Claims29
An optical amplifier device used for a system in which a power transfer takes place from comparatively short wavelength signal to a comparatively long wavelength signal, the optical amplifier device comprising:
- an amplifier stage coupled to an optical transmission medium;
- a monitor monitoring an absence status of a signal in a first band;
- and
- a pump light source unit supplying at least one first pump light to the optical transmission medium on the basis of the absence status of the first band monitored, so that said at least one first pump light supplies additional power to longer wavelength channels related to the absence status of the first band.
An optical amplifier device used for a bi-directional system in which a power transfer takes place from comparatively short wavelength signal to a comparatively long wavelength signal, the optical amplifier device comprising:
- first and second amplifier systems;
- and directional coupling elements coupling the first and second amplifier stages to an optical transmission medium,
- each of said first and second amplifier systems comprising:
- an amplifier stage coupled to the optical transmission medium;
- a monitor monitoring a an absence status of a signal in a first band;
- and
- a pump light source unit supplying at least one first pump light to the optical transmission medium on the basis of the absence status of the first band monitored, so that said at least one first pump light supplies additional power to longer wavelength channels related to the absence status of the first band.
A method of controlling an optical amplifier device, comprising:
- monitoring an absence status of a first band;
- and
- supplying at least one first pump light to an optical transmission medium on the basis of the absence status of the first band monitored, so that said first pump light supplies additional power to longer wavelength channels related to the absence status of the first band.
An optical transmission system comprising:
- optical amplifier devices;
- and
- an optical transmission medium coupling the optical amplifier devices, one of the optical amplifier devices comprising:
- an amplifier stage coupled to the optical transmission medium,
- a monitor monitoring an absence status of a first band and
- a pump light source unit supplying at least one first pump light to the optical transmission medium on the basis of the absence status of the first band monitored, so that said at least one first pump light supplies additional power to longer wavelength channels related to the absence status of the first band.
A bi-directional optical transmission system in which a power transfer takes place from comparatively short wavelength signal to a comparatively long wavelength signal, the bi-directional optical transmission system comprising:
- optical amplifier devices;
- and
- an optical transmission medium coupling the optical amplifier devices, one of the optical amplifier devices comprising:
- first and second amplifier systems, and
- directional coupling elements coupling the first and, second amplifier stages to the optical transmission medium each of said first and second amplifier systems comprising:
- an amplifier stage coupled to the optical transmission medium,
- a monitor monitoring an absence status of a first band, and
- a pump light source unit supplying at least one first pump light to the optical transmission medium on the basis of the absence status of the first band monitored, so that said at least one first pump light supplies additional power to longer channels related to the absence status of the first band.
Dependencies are inferred from the claim text.