Optical shutter

H - Electricity – 04 – B

Patent

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Details

H04B 10/08 (2006.01) H04B 10/213 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 2429805

The invention provides an optical shutter (400) for a communication system of a type comprising first (B1, B2) and second (A1, A2) communication paths along which information-bearing radiation propagates in opposite directions. The shutter (400) comprises: an optical tap (440) and a power monitor (430) for monitoring power of information-bearing radiation propagating along the first path (B1, B2) and for generating a corresponding radiation power indicative signal; a control unit (420) for comparing the indicative signal with a threshold value to generate a control signal (control); and shutter switch (410) for selectively substantially transmitting or blocking radiation propagating along the second path (A1, A2) in response to the control signal.

L'invention concerne un obturateur optique (400) pour un système de communication d'un genre comprenant un premier (B¿1?, B¿2?) et un second (A¿1?, A¿2?) chemins de communication le long duquel le rayonnement porteur d'informations se propage dans des directions opposées. Cet obturateur (400) comprend un robinet optique (440) et un contrôleur de puissance (430) permettant de contrôler la puissance du rayonnement porteur d'informations se propageant le long du premier chemin (B¿1?, B¿2?) et de générer un signal indicateur de puissance du rayonnement correspondant, une unité de commande (420) permettant de comparer le signal indicateur avec une valeur de seuil afin de produire un signal de commande (commande) et un commutateur d'obturateur (410) permettant sélectivement de quasiment transmettre ou bloquer le rayonnement se propageant le long du second chemin (A¿1?, A¿2?) en réaction au signal de commande.

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