Hideo Arimoto

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To provide high-capacity/high-reliability optical-access and short-range links, a novel failure-recovery system utilizing protection optical switch units and multi-core fibers was developed. Configuring the proposed failure-recovery system, the developed multi-core fiber (MCF) connection technology (i.e., fan-in/-out modules and MCF connectors) and a(More)
We report low-loss silicon waveguides and efficient grating coupler to couple light into them. By using anisotropic wet etching technique, we reduced the side wall roughness down to 1.2 nm. The waveguides were patterned along the [112] direction on a [110] silicon-on-insulator substrate. The waveguide boundaries are decided by the [111] planes, which are(More)
2 Ge is considered to be one of the most promising materials for realizing full monolithic integra3 tion of a light source on a silicon (Si) photonic chip. Tensile-strain is required to convert Ge into an 4 optical gain material and to reduce the pumping required for population inversion. Several meth5 ods of strain application to Ge are proposed in(More)
We demonstrate low-loss slot waveguides on silicon-on-insulator platform. Waveguides oriented along the (11-2) direction on the Si (110) plane were first fabricated by a standard e-beam lithography and dry etching process. A tetramethylammonium hydroxide-based anisotropic wet etching technique was then used to remove any residual side wall roughness. Using(More)