Patent ID: 7295782

Claim:
A control method for compensating changes in an SRS-Induced Power Exchange when connecting channels into, and disconnecting channels from, an optical data transmission path of a WDM system having a tilting control via at least one fiber amplifier, the method comprising the steps of: providing at least two tilt control units which operate at different speeds to set tilting of a spectrum of data signals in the optical data transmission path; measuring a change in overall power in the optical data transmission path via a quicker operating tilt control unit of the at least two tilt control units, the quicker operating tilt control unit being connected to at least one filling light source for supplying light energy to said optical data transmission path, the wavelength of the at least one filling light source lies within a transmission useable wavelength band; and immediately compensating the tilting by changing the power of the at least one filling light source via said quicker operating tilt control unit; and returning the power of the at least one filling light source gradually in the direction of an original state existing before the change in overall power via a slower operating tilt control unit of said at least two tilt control units and at the same time adapting the tilting control provided by said at least one fiber amplifier via said slower operating tilt control unit.