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Journals and Conferences
We developed a compact 8 times 8 gate switch subsystem, which was integrated with eight 8:1 SOA modules (72-SOAs). We achieved a high-speed switching, lossless and colored operation.
We have developed a high-performance 8-input and 1-output optical selector for 256×256-ports optical switching systems. This optical selector provides compactness and high reliability as well as high-speed switching of a few nanoseconds.
A novel granularity-flexible wavelength-packet-selective ROADM at 40 Gbit/s based on optical code label switching is presented. A field trial of 640 Gbit/s throughput wavelength-packet-selective ROADM is demonstrated in 16-channel WDM ring network.
Reconfigurable optical add/drop multiplexers (ROADMs) are able to provide flexible wavelength path provisioning in wavelength division multiplexing (WDM) networks. However, the capability of conventional ROADMs is limited to handling wavelength paths, and it does not support fine granularity in add/drop multiplexing of packets. Recently, we have proposed… (More)
Reconfigurable optical add/drop multiplexers (ROADMs), which enable dynamic and flexible node-to-node connection via wavelength paths, are key components in metro ring network nodes. A data-granularity-flexible ROADM node that combines a wavelength-tunable filter, and an optical packet ADM (PADM) has been proposed and demonstrated. In this paper, the first… (More)
We have newly developed a high-speed 4×4 SOA switch subsystem using 4-array monolithically-integrated SOA modules and 100/400-GHz interleavers for DWDM systems. We confirmed high-speed switching performance (&#60; 2.5 ns) with almost no crosstalk for 100 GHz-spaced DWDM signals and an equal optical path latency of less than 1.0 ns deviation.
We developed compact dual-channel Fast Automatic Level CONtrolled (FALCON) amplifiers with 172-M cycle/s control using novel folded 1.3-μm and 1.5-μm SOA modules. We achieved the input dynamic range of more than 28 dB with the output deviation of less than 0.2 dB. We demonstrated the feasibility of FALCON operation for optical packets and CW… (More)
We present the first experimental demonstration of a multi-granularity optical-cross-connect node toward 100-Tbit/s scalability. We successfully show 10.24-Tbit/s throughput with completely error-free operation and an 80-Gbit/s (2 × 40-Gbit/s) optical-virtual-concatenation function between different routes.
We experimentally demonstrate hitless spectrum defragmentation and show the effectiveness of spectrum defragmentation through network simulations. In addition, we implement the OpenFlow extensions for spectrum defragmentation.