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We demonstrate multi-failure restoration in optical layer by using an eleven-node multi- vendor WSON test-bed. Automatic restoration is achieved by deploying colorless and directionless optical switching equipments with WSON-enabled control plane.
For automatically switched dynamic wavelength paths meeting traffic demands of metro/core networks, precise determination of physical impairments over such paths and appropriate configuration of their compensation capabilities are required. This paper discusses control protocol for impairment measurement and compensation configuration for wavelength paths based on the IETF's WSON standardization efforts.
We developed 8-input/1-output (8:1) optical gate- switch module that is compact and reliable by proposing and developing a novel lens coupling scheme suitable for an 8:1 integrated SOA device for a multigate semiconductor optical amplifier (MG-SOA) switch system. We first designed special lenses that collect the tilted SOA beams and simultaneously magnify the pitch and beam size, and we fabricated...
We developed an SOA gate array switch module with a novel polarization-insensitive built-in array isolator. We achieved excellent optical coupling characteristics that had insertion losses of about 3 dB and high-isolation of over 45 dB in 80 nm wide wavelength ranges.
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 times 40-Gbit/s) optical-virtual-concatenation function between different routes.
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 developed a high-speed SOA gate-switch driver using an equal-length wiring technique. It can drive two SOAs simultaneously at 300 mA with a rising time of 2.5 ns for high-speed and high-port count optical switches.
To enable automatic operation of a network where PXC(Photonic Cross Connect) is applied, a novel mechanism is proposed which discovers optical fiber links between the nodes.
We have developed a high-performance 8-input and 1-output optical selector for 256times256-ports optical switching systems. This optical selector provides compactness and high reliability as well as high-speed switching of a few nanoseconds.
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