BIDIRECTOINAL OPTICAL ADD/DROP MULTIPLEXER FOR WAVELENGTH DIVISION MULTIPLEXING OPTICAL NETWORKS

摘要

According to the present invention coupled to an optical fiber for transmission of light signals multiplexed in wavelength division multiplexing optical communication network, a group bidirectional optical / drop multiplexing for performing a channel branch or binding to the said light signals, the forward or reverse optical signals and the multiplexed port on which the path, each station having a plurality of demultiplexing ports being a channel of the multiplexed channels a first wavelength division multiplexer and; Each group performs a bond or a branch of the set channel, wherein the plurality of branch / coupling unit 1 and the demultiplexing ports of the wavelength division multiplexer is connected with one days; And one-to-one connection with the plurality of the branch / coupling part and comprising a second wavelength division multiplexing having a multiplexed port on which the path of the plurality of demultiplexing ports, and the forward or reverse optical signal channels of each of the demultiplexed channels the first and second wavelength division multiplexer is free spectrum of have the same free spectral range, and the wavelength band of the forward optical signal is included in the free spectral range of one period, the wavelength band of the uplink optical signal is different periods It is included in the area.