Patents by Inventor Benjamin James Ainslie

Benjamin James Ainslie 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).

  • Planar waveguides made by use of photosensitive changes to the refractive index of a deposited layer
    Patent number: 5841928
    Abstract: Planar waveguides are produced by using radiation to write path regions into a photosensitive layer. Originally, the photosensitive layer had the same refractive index as the confining regions, e.g., it consists of silica doped with oxides of Ge and B. Composite path regions are produced by depositing a glass soot onto a partial region. On sintering the soot melts to fill up the empty spaces and thereby create a composite layer.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: November 24, 1998
    Assignee: British Telecommunications public limited company
    Inventors: Graeme Douglas Maxwell, Benjamin James Ainslie