Patents by Inventor John Gerald

John Gerald 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 switch with power equalization
    Patent number: 7542675
    Abstract: An optical intensity control system for use with an optical switch providing individual signal paths between input and output ports. The system has a optical splitters connectable to output multiplexers of the switch and also has variable optical intensity controllers (VOICs) for insertion into the individual signal paths. The VOICs individually control the intensity of optical signals present in the signal paths in accordance with intensity control signals. An equalizer is connected to the splitters and to the VOICS, for producing an estimate of the optical power of each individual switched optical signal and generating the intensity control signals. The equalizer is adapted to controllably isolate individual switched optical signals.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: June 2, 2009
    Assignee: Nortel Networks Limited
    Inventors: Alan Frank Graves, John Gerald, Andrew John Bryant