Optical spectral multiplexer for inserting and extracting

Details Optical spectral multiplexer for inserting and extracting Optical spectral multiplexer for inserting and extracting

H - Electricity

04

J

H04J 14/02 (2006.01) G02B 6/34 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 2238888

For extracting a multiplex (MT) from an incoming multiplex (ME) and for inserting a multiplex (MI) to be inserted in an outgoing multiplex (MS), the multiplexer comprises: a distributor (D1) for distributing on N outputs the incoming multiplex (ME); a combiner-distributor for distributing on N circuits the multiplex to be inserted (MI); a first set of N tuneable filters (F¿1??T¿, ..., F¿N??T¿) for selecting the signal carriers which are going to be used for modulating the carriers of the outgoing multiplex (MS); a second set of tuneable N filters (F¿1??E¿, ..., F¿N??E¿) for selecting the carriers which will constitute the extracted multiplex (MT); N wavelength converting devices (CL¿1?, ..., CL¿N?) capable of supplying N carriers of the outgoing multiplex (MS); N optical switches (SW¿1?, ..., SW¿N?) with two inputs and two outputs for selectively connecting each distributor output (D1, D2) to the input of a filter of the first set and/or transmitting to the input of a filter of the second set; and/or transmitting the carriers of the multiplex to be inserted (MI) to a filter 0f the first set, and/or a filter of the second set. The invention is in particular useful to optical transmission networks according to synchronous digital hierarchy.

Pour extraire un multiplex (MT) d'un multiplex entrant (ME) et pour insérer un multiplex (MI) à insérer dans un multiplex sortant (MS), il comporte: un diffuseur (D1) pour distribuer sur N sorties le multiplex entrant (ME); un combineur-diffuseur (D2) pour diffuser sur N sorties le multiplex à insérer (MI); un premier ensemble de N filtres accordables (F1T, ..., FNT) pour sélectionner les porteuses des signaux qui vont être utilisés pour moduler les porteuses du multiplex sortant (MS); un second ensemble de N filtres accordables (F1E, ..., FNE) pour sélectionner les porteuses qui constitueront le multiplex extrait (MT); N dispositifs convertisseurs de longueur d'onde (CL1, ..., CLN) susceptibles de fournir N porteuses du multiplex sortant (MS); N commutateurs optiques (SW1, ..., SWN) à deux entrées et deux sorties, permettant de relier sélectivement chaque sortie des diffuseurs (D1, D2) à l'entrée d'un filtre du premier ensemble et/ou à l'entrée d'un filtre du second ensemble; et/ou transmettre des porteuses du multiplex à insérer (MI) vers un filtre du premier ensemble, et/ou un filtre du second ensemble. Application notamment aux réseaux de transmission optique selon le hiérarchie numérique synchrone.

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