H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
H04Q 3/52 (2006.01) G02B 6/293 (2006.01) G02F 1/313 (2006.01) H04B 10/02 (2006.01) H04B 10/08 (2006.01) H04L 12/28 (2006.01) H04Q 1/20 (2006.01)
Patent
CA 2312499
An approach for performing fault recovery in an optical communications network is disclosed. An optical switch is connected to working optical fibers and protection optical fibers, which carry WDM (wave division multiplexing) optical signals. The optical switches possess functionality to switch over the optical signals among the working optical fibers and the protection optical fibers. The optical switch includes dual unit optical switches that have a common driving mechanism. The common driving mechanism is configured to perform simultaneously switching operation of the unit optical switches to alter a switching state of the optical switch. Monitoring devices are distributed throughout the node to monitor the transmitted optical signals over the optical fibers, and to output monitoring signals that indicate one or more faults in these optical fibers. In response to the monitoring signals, a control device outputs control signals to the optical switches to effect an optical protection scheme.
Smart & Biggar
The Furukawa Electric Co. Ltd.
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