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We developed ODU-XC, CDC-ROADM, and silicon photonics switch, and built an eight-node network capable of 90Tbps based on NSI-CS standard protocol. Its energy consumption was orders of magnitude lower than that achievable with IP routers.
We propose new power saving optical network architecture. The power saving standby mode on the backup path using power-saving transponders / regenerators can save 50 % of power consumption.
A flexible and compact hierarchical optical cross-connect (HOXC) node that considers a practical waveband add/drop restriction is proposed. We introduce a prototype HOXC system and verify its technical feasibility and transmission characteristics.
We propose a simple node architecture that is used to concatenate two ROADM rings. The proposed architecture employs variable filters that can effectively handle classified node input signals to realize the desired routing operations. Finally, we developed a prototype system and performed transmission experiments. The technical feasibility has been confirmes.
We introduce a compact matrix-switch-based hierarchical optical path cross-connect prototype system that exploits integrated colorless waveband multi/demultiplexers. Its performance ensures cost-effective networks can be created.
We analyze the performance of a multiple-ROADM-ring connected network that utilizes Hierarchical Optical Cross-Connects (HOXC). We clarify the impacts of the waveband capacity and waveband add/drop ratio at the HOXC node on the node performance and switch scale.
We propose a wavelength assignment algorithm that offers full-mesh node connectivity of two concatenated, bidirectional ring networks. This algorithm is proved to minimize the necessary number of wavelengths. We also describe three schemes that can reduce the switch scale at the ring-concatenating nodes: separation of intra-ring and inter-ring operation, hierarchical optical path switching, and introduction...
We propose a novel compact hierarchical optical cross-connect architecture that implements the colorless waveband add/drop ratio restriction, and a novel MUX/DMUX that can be used by different wavebands. We show that the proposed cross-connect architecture can reduce switch scale significantly compared to conventional one. The function of the newly proposed MUX/DMUX is verified in an experimental...
We propose a route and wavelength/waveband assignment method for multi-ring networks linked by hierarchical optical cross-connects. Numerical experiments reveal that the switch scale is significantly reduced at the cost of a marginal drop in routing capability.
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