Patents by Inventor Luhua Xu

Luhua Xu 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).

  • Patterned accumulation mode capacitive phase shifter
    Patent number: 10330962
    Abstract: A semiconductor waveguide device includes a first semiconductor layer having a first surface, wherein the first surface comprises a first protrusion and a second protrusion collectively forming a first trench in the first semiconductor layer, a second semiconductor layer having a second surface opposing the first surface of the first semiconductor layer, and an insulator layer disposed between and in contact with the first surface and the second surface, wherein the first semiconductor layer, the second semiconductor layer, and the insulator layer form a semiconductor waveguide region, and wherein the first trench is configured to confine a mode of light beam propagation in the semiconductor waveguide region.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: June 25, 2019
    Assignee: Ciena Corporation
    Inventors: Nicolás Abadía Calvo, Luhua Xu, David Patel, David V. Plant, Mahdi Parvizi, Naim Ben-Hamida