Patents by Inventor Anne C. Tropper

Anne C. Tropper 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 fibre amplifier and laser
    Patent number: 5406410
    Abstract: An optical fibre amplifier comprises a thulium-doped optical fibre pumped at 790 nm by a semi-conductor diode laser coupled to the fibre via optical fibre coupler. The amplifier is optically coupled in series to a pair of systems fibres to provide amplification to optical signals.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: April 11, 1995
    Assignee: British Telecommunications plc
    Inventors: David C. Hanna, Jeremy N. Carter, Anne C. Tropper, Richard G. Smart