Patents by Inventor Robin P Rickard

Robin P Rickard 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).

  • Coherent optical receiver
    Patent number: 7085501
    Abstract: A coherent optical intradyne receiver is described which comprises an optical image reject mixer capable of dividing, mixing and recombining signals from three inputs so as to produce an inphase and a quadrature channel. On each of the channels a same set of image products is cancelled and from which channels, phase modulated signals can be recovered.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: August 1, 2006
    Assignee: Nortel Networks Limited
    Inventors: Robin P Rickard, Richard Epworth, Seb J Savory