Patents by Inventor Herbert Weissert

Herbert Weissert 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).

  • Method of producing polarization-maintaining single-mode optical waveguides and preforms used therein
    Patent number: 4805986
    Abstract: A method of producing polarization-maintaining single-mode optical waveguides is provided wherein the preform from which the optical waveguide is produced consists of a tube, a rod of core and cladding material centrally disposed in said tube, and two differently doped pairs of filler rods disposed about said rod, the two rods of each pair being disposed diametrically opposed to each other with respect to said rod. Maximum polarization maintenance of the optical waveguide being produced is achieved by choosing the diameter ratios so that each filler rod rests against the central rod, against the inside wall of the tube, and directly against the two filler rods of the respective other pair.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: February 21, 1989
    Assignee: Standard Elektrik Lorenz AG
    Inventor: Herbert Weissert