Optical transmitter-receiver routes to protect a ring passive optical metropolitan access.

摘要

A network component for a passive optical network, wherein the network comprises main nodes of two separate optical paths and passive nodes (Np), the passive nodes are connected to both optical paths via an optical splitting device, the device optical splitting has an asymmetrical splitting ratio, transferring light into different fibers or accepting light from different fibers and characterized in that the splitting ratio is adjustable according to the difference of light intensities detected both ring segments of both optical paths.