Patents by Inventor Jonathon Stuart Drake

Jonathon Stuart Drake 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).

  • Variable gain optical amplifiers
    Patent number: 7317570
    Abstract: A variable gain optical amplifier comprises an EDFA for amplifying optical signals at different wavelengths and a pump driver 14 for optically pumping the EDFA to provide optical gain. An input detector 2 is provided for monitoring the power Pin of input signals to the EDFA, and an output detector 3 is provided for monitoring the power Pout of output signals from the EDFA. A gain control arrangement is provided for supplying a drive signal to the pump driver 14 to control the optical gain including a feed forward arrangement 20, 21, 22, 23 for supplying a feed forward signal dependent on the monitored input power Pin, and a feed back arrangement 5, 6, 7, 8, 9, 30 for supplying a feed back signal dependent on the monitored output power Pout.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: January 8, 2008
    Assignee: Bookham Technology plc
    Inventors: Ian Peter McClean, Stephen David Fourte, Jonathon Stuart Drake, Barrie Flintham