Patents by Inventor Yukihiko Mikami

Yukihiko Mikami has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Microlensed optical terminals and optical system equipped therewith, and methods for their manufacture, especially an optical coupling method and optical coupler for use therewith
    Patent number: 5293438
    Abstract: The tip of a first optical fiber 8 is fused integrally to a second optical fiber 7, having a single refractive index and an identical outer diameter, which has a spherical lens 10 with the length and diameter to produce a beam expansion by Gaussian diffusion to at least 80 .mu.m or greater at the exit and a radius of curvature greater than 200 .mu.m. The spherical part of the second fiber is formed by thermal fusion; a spherical lens having the desired diameter at the optical fiber tip is formed by feeding the optical fiber tip into a thermal fusion unit to form the spherical lens. An optical fiber terminal for optical coupling composed of a single mode optical fiber, a non-doped silica fiber beam expansion segment, and a non-doped silica spherical lens, is connected to a polarization-independent optical isolator.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: March 8, 1994
    Assignee: Namiki Precision Jewel Co., Ltd.
    Inventors: Yoshihiro Konno, Masato Tatenuma, Hiroshi Kume, Yukihiko Mikami