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We propose a highly scalable and compact optical-node architecture that combines the subsystemmodular optical cross-connect (OXC) and transponderbank add/drop, where multiple M × M wavelength-selective switches are effectively introduced. Numerical experiments verify that the proposed architecture offers large-scale nodes with substantially relaxed hardware requirements while holding the fiber-utilization...
We proposed a dynamic control algorithm for multi-stage routing optical path networks. Numerical experiments demonstrate that the resulting networks offer almost the same performance as the conventional networks, while enabling a significant hardware scale reduction.
We evaluate the performances of scalable large-scale OXC architectures; all utilize a two-stage routing mechanism that dynamically groups wavelength paths and conditionally selects output fibers. The architectures are shown to reduce necessary hardware scale substantially.
We evaluate hardware requirements for a newly proposed low-loss large-scale OXC architecture that utilizes two-stage routing. It is verified that the architecture attains significant hardware scale reduction and decreased loss.
We propose a novel compact wavelength tunable filter that combines multi-input/output AWG wavelength routing and switches. The necessary switch scale is shown to be significantly reduced. The wavelength selection capability of a prototype is confirmed.
We fabricated 1 × 10 WBSS (WaveBand Selective Switch) integrated on a single PLC chip. The WBSS offers additional waveband drop ports for wavelength path grooming and termination. Experiments confirmed its excellent performance.
The first practical hierarchical optical cross-connect system is developed and its feasibility confirmed using field-installed fibers. Fully-implemented equipment requires a 16-U chassis to manage 4.8-Tbit/s signals from 8 WDM lines and 160 client ports.
An efficient ROADM-ring connecting node architecture is proposed that utilizes waveband routing and achieves small footprint and cost-effectiveness. The key component devices are implemented using PLC technologies and the system performance is experimentally verified.
We propose a new waveband MUX/DEMUX that uses two concatenated cyclic AWGs. The device can accommodate multiple input fibers simultaneously and as a result, the device cost and size of a waveband cross-connect can be significantly reduced.
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