Optical switching unit, particularly for switching to...

H - Electricity – 04 – Q

Patent

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Details

H04Q 3/52 (2006.01) H04B 10/04 (2006.01) H04B 10/24 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 2220760

An optical switching unit is disclosed which permits switching from faulty components to standby components in optical transmission systems. A component in this connection may be a transmit laser or an optical fiber, for example. The optical switching unit (OSE) according to the invention contains an n x m optical space switch (ORS) whose ports (P1A...PNA; P1B...PMB) are monitored by photodiodes (M1A, M1B). The photodiodes provide a control unit (SE) with information as to whether and, if so, what signals are arriving at the ports. The control unit (SE) controls the position of the optical switch (ORS) in accordance with program instructions. The switching unit controls itself, i.e., incorporation of a higher-level control center is not necessary. It thus allows very short switching times and has many applications; it is particularly suitable for use in modular optical transmission systems.

L'invention est une unité de commutation optique qui permet d'effectuer une commutation entre des éléments défaillants et des éléments de secours dans les systèmes de transmission optiques. Ces éléments peuvent être des lasers d'émission ou des fibres optiques, par exemple. L'unité de commutation optique (OSE) de l'invention contient un commutateur spatial optique n x m (ORS) dont les ports (P1A...PNA; P1B...PMB) sont surveillés par des photodiodes (M1A, M1B). Celles-ci communiquent avec une unité de commande (SE) pour lui dire si des signaux sont arrivés aux ports et, si tel est le cas, pour identifier ces signaux. Cette unité (SE) commande la position du commutateur optique (ORS) selon les instructions d'un programme. L'unité de commutation se commande elle-même et il n'est pas nécessaire d'avoir recours à un centre de contrôle d'un niveau supérieur. Elle permet donc d'obtenir des temps de commutation très courts et a de nombreuses applications; elle est particulièrement appropriée aux systèmes de transmission optiques modulaires.

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