Alcatel Cit

Alain Noury

Philippe Perrier

Luc Berthelon

Christian Coeurjolly

Herv&eacute; Fevrier

St&eacute;phane Ruggeri

An extract-and-insert optical wavelength division multiplexer includes a broadcaster (D,) for applying an incoming multiplex signal to N outputs, a combiner-diffuser (D,) for broadcasting the multiplex to be inserted (MI) on N outputs, a first set of N tunable filters (FIT, . . . , FNT) for selecting the carriers of the signals which are to be used for modulating the carriers of the outgoing multiplex (MS), a second set of N tunable filters (F,E, . . . , FNE) for selecting the carriers which are to constitute the extracted multiplex (MT), N wavelength converter devices (CL,, . . . , CLN) suitable for supplying N carriers of the outgoing multiplex (MS), and N two-input, two-output optical switches (SW,, . . . , SWN) enabling each output of the broadcasters (D,, D,) to be selectively connected to the input of a filter of the first set and/or to the input of a filter of the second set, and/or to transmit the carriers of the multiplex to be inserted (MI) to a filter of the first set and/or a filter of the second set. The multiplexer is particularly applicable to optical transmission networks implementing a synchronous digital hierarchy.

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Massy, France

Alain Noury