Patents by Inventor David J. M. Stothard

David J. M. Stothard 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).

  • Parametric generation using intersecting cavities
    Patent number: 7768695
    Abstract: A parametric device having a non-linear material (4) for generating an idler wave and a signal wave (16) in response to a pump wave (14), the pump, idler and signal waves being non-collinear, the device having a cavity (10, 11) resonant at the pump wavelength and means for varying the angle between the propagation directions of the pump and idler waves.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: August 3, 2010
    Assignee: The University Court of the University of St. Andrews
    Inventors: Malcolm H. Dunn, Cameron F. Rae, Tom J. Edwards, David J. M. Stothard, David Walsh
  • Coating for optimising output coupling of em radiation
    Patent number: 7626756
    Abstract: A coating between a nonlinear crystal and a silicon prism coupler, prevents transmission of radiation scattered within the crystal by filtering out frequencies outside the silicon bandgap to avoid free carrier absorption, but transmits THz frequencies that correspond to the bandgap.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: December 1, 2009
    Assignee: The University Court of the University of St. Andrews
    Inventors: Malcolm Dunn, Cameron F. Rae, Tom J. Edwards, David J. M. Stothard, David Walsh
  • PARAMETRIC GENERATION USING INTERSECTING CAVITIES
    Publication number: 20090021825
    Abstract: A parametric device having a non-linear material (4) for generating an idler wave and a signal wave (16) in response to a pump wave (14), the pump, idler and signal waves being non-collinear, the device having a cavity (10, 11) resonant at the pump wavelength and means for varying the angle between the propagation directions of the pump and idler waves.
    Type: Application
    Filed: January 26, 2007
    Publication date: January 22, 2009
    Inventors: Malcolm H. Dunn, Cameron F. Rae, Tom J. Edwards, David J.M. Stothard, David Walsh
  • Coating for Optimising Output Coupling of Em Radiation
    Publication number: 20080298757
    Abstract: A coating (10) between a nonlinear crystal (5) and a silicon prism coupler (9), prevents transmission of radiation scattered within the crystal (5) by filtering out frequencies outside the silicon bandgap to avoid free carrier absorption, but transmits THz frequencies that correspond to the bandgap.
    Type: Application
    Filed: January 26, 2007
    Publication date: December 4, 2008
    Inventors: Malcolm Dunn, Cameron F. Rae, Tom J. Edwards, David J.M. Stothard, David Walsh