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We develop a design method for creating a large-scale optical switch consisting of two sub-switch parts, i.e., delivery-and-coupling switches and wavelength-routing switches based on cyclic arrayed-waveguide gratings, where the available optical-power budget is optimally allocated to the two sub-switches to maximize the entire switch scale. The power budget necessary for each sub-switch is quantitatively...
Intra-datacenter traffic is growing more than 20% a year. In typical datacenters, a large number of top-of-rack switches are interconnected via multi-tier electrical switches. The electrical switches necessitate power-consuming optical-to-electrical (OE) and electrical-to-optical (EO) conversion. In addition, the power consumption increases with the growing traffic. To overcome this problem, optical...
We propose a novel and highly scalable optical-node architecture utilizing MxN asymmetric-multiport wavelength-selective switches (WSSs), within which we implement subsystem-modular optical cross-connects (OXCs) and a transponder-bank-based add/drop part. Although the proposed add/drop part has a bank-based structure, it can realize flexible routing through the routing capability of the MxN WSSs....
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