| 摘要 |
An optical signal processing method and apparatus for combining the add/drop lines for multiple add/drop multiplexers (ADMs) (58, 60, 62) into a single pair of add/drop lines (54, 56), comprising a plurality of optical fiber trunks (42, 44, 46, 48, 50, 52) for carrying trunk traffic, a plurality of branching units (58, 60, 62), each attached to one of the fiber trunks, and each having an add and drop port, a fiber grating (472) in each branching unit for passing the branch traffic from the add port to the drop port of each of the branching units, and a single fiber pair connecting the branching units for carrying branch traffic between the branching units.
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