Abstract
For fiber networks with regenerative (active) nodes, failure of a regenerative node usually leads to failure of the network. It is, therefore, desirable to have a fail-safe switch that can optically bypass the failed node. In addition, the node should be able to perform a self-test when the network fails (or just for a routine check) so that the healthy nodes can be reconnected to the network. This fail-safe switch can be either electromechanical (EM) or electrooptical (EO).
© 1986 Optical Society of America
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