Patents by Inventor David Waddy

David Waddy 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).

  • Dynamic polarization mode dispersion emulator
    Publication number: 20050129346
    Abstract: A polarization mode dispersion emulator randomly varies the birefringence of each wave-plate in a biased manner to track the dynamics of polarization mode dispersion in time and allows for different cable types to be emulated. A Gaussian probability density function is used to create the biased changes. A new wave-plate model is derived to accurately model the birefringence changes of the emulator.
    Type: Application
    Filed: March 13, 2003
    Publication date: June 16, 2005
    Applicant: University of Ottawa
    Inventors: Liang Chen, Xiaoyi Bao, David Waddy