Low loss and cost-effective hierarchical optical path cross-connect switch architecture based on WSS/WBSS


We propose a novel hierarchical optical cross-connect node architecture that consists of WSSs/WBSSs (waveband selective switch). The proposed architecture reduces the number of WSSs/WBSSs by effectively utilizing star couplers. The large power loss of the couplers is efficiently offset by the novel waveband drop function. 


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