Shigeru Tomita

TL;DR: In this article, the authors realized mode-division multiplexing (MDM) transmission by using orthogonal LP modes with negligible modal crosstalk, for the first time.

TL;DR: In this paper, the authors describe the characteristics of TEC fiber theoretically and experimentally and reveal theoretically that when fabricating TEC fibers the mode field diameter (MFD) is enlarged more effectively by increasing the heating temperature rather than the heating time.

TL;DR: In this article, a mode group delay managed transmission line for a WDM-MIMO system consisting of fibers with positive and negative DMDs to compensate for the total DMD was proposed.

TL;DR: In this paper, an optical waveguide comprising a core portion made of a light propagating material and a cladding portion, a first dopant and a second dopant being induced into the core portion, the one dopant having a function of increasing a refractive index of the light propagation material and having a first thermal diffusion coefficient to the light propagated material, the second dopaddant having function of decreasing the refractive indices of said light propagative material, having a second thermal diffusion coefficients under a predetermined temperature.

TL;DR: In this article, the authors proposed a new photonic crystal fiber design with a W-shaped effective index profile to achieve the largest effective area (Aeff) for telecommunication use, achieving a 220μ m2Aeff while achieving both a cable cutoff wavelength of less than 1300 nm and a bending loss compatible with ITU-T recommendations G.655 and G. 656.