Optical matrix protection system

摘要

An optical matrix protection system is described. Optical signals that are cross-connected by a NxN matrix switch are routed through alternative protection paths using an optical matrix protection system. The optical matrix protection system includes a Nx1 optical switch and a 1xN optical switch. An input port of the 1xN optical switch is coupled to an output port of the Nx1 optical switch. Input ports of the Nx1 optical switch are connected to a plurality of 1x2 optical switches, which selectively switch input optical signals to either the NxN matrix switch or to the Nx1 optical switch. Output ports of the 1xN optical switch are connected to a plurality of 2x1 optical switches, which selectively switch optical signals from either the NxN matrix switch or laid the 1xN optical switch to an output line.