Patents by Inventor Philippa Julia Mary Parmiter

Philippa Julia Mary Parmiter 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).

  • Travelling-wave guide electro-optic modulator
    Patent number: 7130493
    Abstract: A Mach-Zehnder type electro-optic modulator based, for example, on GaAs/GaAlAs of InP/InGaAsP comprises coplanar stripline (CPS) electrodes, and optical waveguides, disposed on a conducting substrate or a conducting epitaxial layer, wherein the regions underlying the CPS electrodes are selectively rendered insulating by ion implantation to electrically isolate the CPS electrodes.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: October 31, 2006
    Assignee: Qinetiq Limited
    Inventors: John Michael Heaton, Philippa Julia Mary Parmiter
  • Travelling-wave guide elctro-optic modulator
    Publication number: 20040052443
    Abstract: A Mach-Zehnder type electro-optic modulator based, for example, on GaAs/GaAlAs of InP/InGaAsP comprises coplanar stripline (CPS) electrodes, and optical waveguides, disposed on a conducting substrate or a conducting epitaxial layer, wherein the regions underlying the CPS electrodes are selectively rendered insulating by ion implantation to electrically isolate the CPS electrodes.
    Type: Application
    Filed: July 17, 2003
    Publication date: March 18, 2004
    Inventors: John Michael Heaton, Philippa Julia Mary Parmiter