Alcatel

Alcatel Lucent

Vincent Bouder

Jean-Paul Faure

Olivier Courtois

A device (D) is dedicated to controlling degradation parameters associated with signals on channels with different wavelengths, possibly arranged in bands of channels, and transmitted by transmission lines (Lj) connecting nodes (Ni) of a transparent optical communication network. The device includes processing means (PM) adapted, in the event of transmission of signals of at least two channels or bands of channels by at least one transmission line (Lj), to measure for each of said channels or each of said bands of channels, firstly, the value of a parameter representative of the degradation of the signals on the corresponding line (Lj) and, secondly, taking account of said measured values, a power profile to be imposed on the signals so that they have predetermined degradation parameter values.

Dynamic control of the level of degradation of optical signals in a transparent optical communication network

It is disclosed a system for gain equalization in an optical communication system, comprising a fiber link with a two-stage EDFA with an inter-stage access, and in the inter-stage a Dispersion Compensating Fiber, a Raman pump source (RMP) in the contra-propagating way, a Variable Optical Attenuator and a gain flattening filter. The Raman pump is adapted to provide a first gain slope with an opposite trend with respect to the filter and VOA, and is further adapted such that the pump power can be controlled so as to modify the gain slope and get the gain equalization.

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Paris, France

Vincent Bouder