Patent ID: 7751720

Claim:
A dispersion compensation tuning arrangement for an optical transmission system comprising WDM configuration and having an optical transmission line ( 2 ), the arrangement comprising a tunable dispersion compensation module ( 4 ) and at least one distributed Raman amplifier comprising a Raman pump ( 1 ) being coupled to the transmission line ( 2 ), characterized in that the tunable dispersion compensation module ( 4 ) is located at or substantially close to a transmitting end of the optical transmission line ( 2 ) and the Raman pump ( 1 ) is operatively coupled with the tunable dispersion compensation module ( 4 ) via a control loop ( 3 ) wherein the Raman pump ( 1 ) communicates a control signal to the tunable dispersion compensation module ( 4 ) to adjust a response of the tunable dispersion compensation module ( 4 ).