Optical 1xn and nxn switching matrix having a tree structure

Details Optical 1xn and nxn switching matrix having a tree structure Optical 1xn and nxn switching matrix having a tree structure

H - Electricity

04

Q

H04Q 3/52 (2006.01) G02F 1/313 (2006.01)

Patent

CA 2199848

1. Optical 1×N and N×N switching matrix having a tree structure. 2.1 In the case of 1×N switching matrices having a tree structure, in which an optical input (1 0) is con- nected to N outputs (1 1) by means of an optical waveguide structure (1) which branches like a tree, and in which an optical changeover switch (4) is arranged in each junc- tion point (3) of the waveguide structure, it is intended to improve the crosstalk suppression. 2.2 To this end, in each case one gate switch (5) is assigned to each output (1 1) for optional release and blocking of this output (1 1) as a function of a switching state of the changeover switch (4) of a junction point (3) from which a branching waveguide (11) is connected to this output (1 1). An N×N switching matrix, which is also described, having greatly improved crosstalk suppression can be obtained with such 1×N switching matrices. 2.3 For use in optical communications networks, for example telecommunications networks. 3. Figure 1

L'invention vise à améliorer la suppression de la diaphonie dans des matrices de commutation 1xN arborescentes, dans lesquelles une entrée optique (10) est reliée à N sorties (11) par une structure (1) arborescente de guides d'ondes optiques, un commutateur optique (4) étant disposé à chaque point de ramification (3) de la structure de guides d'ondes. A cet effet, une porte (5) est affectée à chaque sortie (11) afin de débloquer ou de bloquer, au choix, cette sortie (11) en fonction de l'état de commutation du commutateur (4) d'un point de ramification (3), raccordant un guide d'ondes de ramification (11) à cette sortie (11). Ces types de matrices de commutation 1xN permettent également d'obtenir une matrice de commutation NxN présentant une suppression de la diaphonie nettement améliorée. Ces matrices peuvent être appliquées dans des réseaux de communications optiques, par exemple dans des réseaux de télécommunications.

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