Patents by Inventor Martin Christopher Tatham

Martin Christopher Tatham 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).

  • Dispersion compensation in an optical communications system
    Patent number: 5861970
    Abstract: A method of compensating for dispersion in an optical communications system includes the steps of: positioning a semiconductor optical amplifier between a first and a second length of optical fibre, launching optical signals into the first length of optical fibre, directing optical signals emerging from the first length of optical fibre into the semiconductor optical amplifier, supplying optical pump radiation to the semiconductor optical amplifier so that the optidcal signals and the pump radiation interact within the semiconductor optical amplifier and generate the phase conjugate of the optical signals, and launching the phase conjugate optical signals into the second length of optical fibre.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: January 19, 1999
    Assignee: British Telecommunications public limited company
    Inventors: Martin Christopher Tatham, Gerard Sherlock