Patents by Inventor Kate Sugden

Kate Sugden 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).

  • Gain clamped amplifier
    Patent number: 5872649
    Abstract: The gain provided by an erbium amplifier is stabilised by spectrally selective optical feedback to make the amplifier lase. The resulting laser emission is extracted from the amplifier output using a Mach Zehnder with matched Bragg reflectors in its two interference arms. The extracted light may be used for supervisory purposes. Part of the laser cavity defining feedback may be provided by the Mach Zehnder by arranging one of its Bragg reflectors to be displaced with respect to the other.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: February 16, 1999
    Assignee: Northern Telecom Limited
    Inventors: Kevin Christopher Bryon, Kate Sugden
  • Lasers
    Patent number: 5844926
    Abstract: A laser has an optical laser cavity one end of which is constituted by a partial reflector formed in optical waveguide by an unbalanced Michelson interferometer comprising an optical waveguide splitter/combiner (23; 33) and two optical waveguide Bragg grating reflectors (24a, 24b; 34a, 34b; 44a, 44b).
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: December 1, 1998
    Assignee: Northern Telecom Limited
    Inventors: Kevin Christopher Byron, Kate Sugden