Patents by Inventor John E. Midwinter

John E. Midwinter 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).

  • Apparatus for launching or detecting waves of selected modes in an optical dielectric waveguide
    Patent number: 4125768
    Abstract: A launcher for waves of selected mode in an optical dielectric waveguide having a core surrounded by cladding, in which the launcher includes a prism of refractive index greater than that of the waveguide and preferably greater than that of the core of the waveguide which is placed against the waveguide either before or alongside an outwardly tapering portion of the waveguide. Light from a laser is directed through the prism on to the waveguide to induce the waves in the waveguide. A matching fluid, which may set to a solid, improved the coupling of the prism to the waveguide. A detector of similar construction is also described, the tapering of the waveguide being inward.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: November 14, 1978
    Assignee: Post Office
    Inventors: Lynden A. Jackson, John E. Midwinter