Patents by Inventor Jill Hacker

Jill Hacker 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).

  • Cylindrical-wave controlling, generating and guiding devices
    Patent number: 5357591
    Abstract: Designs for cylindrical-wave controlling, generating and guiding devices are disclosed, which include multi-cylindrical-layer reflector and anti-reflection for unguided cylindrical waves, and concentric-circle-grating waveguide reflector, directional coupler and distributed feedback structures for guided cylindrical waves. A multi-cylindrical-layer structure takes the form of cylindrical layers wrapped concentrically around a central rod. A grating waveguide structure takes the form of a slab waveguide in which one of the slabs has circular ridge-groove grating. Layer and ridge-groove spacings are critical to the functionality of these structures. Design rules are outlined. These structures are important components for cylindrical wave controls. Designs of narrow-linewidth and high-power surface-emitting semiconductor lasers using the grating reflectors and 90-degree couplers are also disclosed.
    Type: Grant
    Filed: April 6, 1993
    Date of Patent: October 18, 1994
    Inventors: Yuan Jiang, Jill Hacker