Alcatel

Alcatel Lucent

Jean-Paul Faure

Ludovic Noirie

Arnaud Bisson

Nicolas Le Sauze

Rachid Laalaoua

Vincent Bouder

Franck Pain

Magali Prunaire

Optical node () comprising at least one input port (PA, PC, PE) and a plurality of output ports (PB, PD, PF), at least one add unit (B,D,F) for adding at least one signal on an output port (PB, PD, PF), a broadcasting unit () for broadcasting on at least two output ports (PB, PD, PF) the express traffic received on an input port (PA, PC, PE), characterized in that the broadcasting unit () is configured for broadcasting at least one added signal on at least two output ports (PB, PD, PF).

Flexible node architecture with full protection

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

The present invention relates to a method of monitoring the transmission of optical signals including a step of inserting a monitoring signal (S) more particularly suited to monitoring the quality of service. During the transmission of optical signals each carried by a predefined wavelength defining a transmission channel (C), said signals are grouped onto the same fiber in a band (B) of channels. The method then includes a step of simultaneously modulating said signals grouped in the band of channels using the monitoring signal to be transmitted, so that each of the signals constitutes a carrier of the monitoring signal.

Method and a system for monitoring the transmission of optical signals

A reconfigurable directional optical system comprises N ports that can be configured individually as inputs or outputs. A system of this kind comprises at least one optical device having unidirectional inputs and outputs the total number of which is equal to or less than N, and an N&#xd7;N optical switch such that each of the ports can be coupled interchangeably either to one of the inputs or to one of the outputs of the optical device.

Reconfigurable directional optical system

A device (D) is dedicated to controlling the power of optical signals in a transparent switching node of an optical communication network that switches bands of wavelengths. The device includes, firstly, a controller () for comparing input optical power measurements to a selected first threshold and generating instructions representative of the comparison result, secondly, a measuring device (A) for delivering measurements representative of the input optical power of the optical signals at one output at least of the switch (), and thirdly, a processor between the switch () and the multiplexer () of the node and which control the optical power of the signals coming from the switch () as a function of the instructions they receive, so that the optical power of the signals at the input of the multiplexer () is maintained substantially constant.

Method and an improved device for controlling the power delivered at the output of a node of an optical network that switches bands of wavelengths

An optical demultiplexer system for separating adjacent wavelength bands without losing inter-band channels and comprising a first filter stage () of relatively narrow passband and relatively high selectivity in order to extract all of the inter-band channels. The first stage is followed by a second filter stage () of relatively broad passband and relatively low selectivity to extract the wavelength bands delivered by the first filter stage. Such a system makes it possible to use the inter-band channels, in particular for managing the network and the wavelength bands.

System for optically demultiplexing wavelength bands

An optical demultiplexing system demultiplexes a multiplex which has at least three levels of granularity and includes m interleaved bands of wavelengths each of which includes p wavelengths. The system includes a 1-to-m deinterleaving demultiplexer for demultiplexing the multiplex into m bands of wavelengths and a 1-to-p deinterleaving demultiplexer for demultiplexing each of the m bands into p wavelengths. The numbers m and p are mutually prime.

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Paris, France

Jean-Paul Faure