On/off optical switching using combined acousto-optic and...

H - Electricity – 04 – Q

Patent

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Details

H04Q 11/00 (2006.01) G02B 6/35 (2006.01) G02F 1/11 (2006.01)

Patent

CA 2601609

A light beam on a single optic fiber carries time division multiplexed information originating from multiple sensors driven from a single light source. An optical switch apparatus coupled in series between the source and the sensors switches the light beam of the source between ON and OFF states. The switch apparatus includes an electro-optic switch and an acousto- optic switch coupled in series with the electro-optic switch. A controller and drivers for the electro-optic and acousto-optic switches produce in an appropriate time sequence control signals resulting in a desired ON and OFF time of the light beam being switched.

Un faisceau lumineux transporté par une unique fibre optique porte des information multiplexées par répartition dans le temps provenant de plusieurs capteurs commandés par une source lumineuse unique. Un appareil de commutation optique monté en série entre la source et les capteurs, commute le faisceau lumineux de la source entre les positions marche et arrêt. Ledit appareil comporte un commutateur électro-optique et un commutateur acousto-optique monté en série avec le commutateur électro-optique. Un contrôleur et des pilotes des susdits commutateurs produisent au moment voulu des signaux de commande séquentiels correspondant aux temps de marche et d'arrêt désirés du faisceau lumineux à commuter.

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