Patents by Inventor Julie Burton

Julie Burton 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).

  • Optical switching device with passive input and output stages and active amplifier in a matrix stage
    Patent number: 5528710
    Abstract: A semiconductor optical switching device comprises a passive optical input stage, a matrix stage and a passive optical output stage. The matrix stage incorporates active amplifiers, the switch as a whole being therefore part passive and part active. Control over the switching configuration is provided by electrical inputs to the amplifiers. The matrix stage guides optical signals in a direction transverse to optical signals propagating in the input or output stages. With this configuration, fixed change in direction of the optical paths available to optical signals propagating through the device are provided by splitters, combiners and total internal reflection mirrors.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: June 18, 1996
    Assignee: British Telecommunications Public Limited Corporation
    Inventors: Julie Burton, Philip J. Fiddyment, Michael J. Robertson