Patent ID: 7848656
Filing Date: 2010-12-07
Classification: H04B

Abstract:
1. A method of operating a WDM transmission system with at least one transmitter and at least one receiver connected by means of a dispersive transmission line, said method comprising the steps of successively: a) setting a tuneable dispersion pre-compensation value at a transmitter-side Tuneable Dispersion Compensation Module in operative connection with the transmitter to a first predetermined value, b) setting or adjusting a tuneable dispersion post-compensation value at a receiver-side Tuneable Dispersion Compensation Module in operative connection with the receiver to a second value in order to optimise at least one characteristic of a transmitted signal at the receiver where the transmitter-side Tunable Dispersion Compensation Module and the receiver-side Tunable Dispersion Compensation Module are operatively coupled; and c) simultaneously tuning the transmitter-side Tuneable Dispersion Compensation Module and the receiver-side Tuneable Dispersion Compensation Module with substantially opposite respective dispersion shifts, such that at all times a third value+a fourth value=the first predetermined value+the second value, wherein the third value is a compensation value of the transmitter-side Tunable Dispersion Compensation Module and the fourth value is a compensation value of the receiver-side Tunable Dispersion Compensation Module, in order to further optimise said characteristic of the transmitted signal.