Patents by Inventor Roswitha Giedl

Roswitha Giedl 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).

  • Incubated Bragg gratings in waveguides
    Patent number: 5574810
    Abstract: A Bragg reflection grating is written in photosensitive optical fiber using ultra-violet light from an ArF excimer laser with the aid of a phase grating to create a fringe pattern. The writing is effected by a type II damage process performed in two stages, the first of which involves the creation of a low reflectivity grating, which is incubated to greater reflectivity in the second stage. Incubation is performed without the use of any fringe pattern.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: November 12, 1996
    Assignee: Northern Telecom Limited
    Inventors: Kevin C. Byron, Peter Dyer, Robert Farley, Roswitha Giedl