Patents by Inventor Harm Weerden

Harm Weerden 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).

  • Arrayed waveguide grating
    Patent number: 7058262
    Abstract: An arrayed waveguide grating (AWG) device is described in which there are a plurality of output waveguides (10) coupled at one end to the output side of an second optical interaction region (4) of the AWG, and wherein the output waveguides are substantially identically curved in at least a portion of the fan-out region of the AWG. This improves the channel (frequency) spacing accuracy of the AWG. In one embodiment input waveguides (2) of the AWG are also substantially identically curved in at least a portion of the fan-in region of the AWG, these being inversely curved to the substantially identically curved portions of the output waveguides, with respect to the direction of travel of light along the waveguides. This has been found to reduce asymmetry in the channel output response.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: June 6, 2006
    Inventors: Michael Lanker, Harm Weerden
  • Arrayed waveguide grating
    Publication number: 20040096157
    Abstract: An arrayed waveguide grating (AWG) device is described in which there are a plurality of output waveguides (10) coupled at one end to the output side of an second optical interaction region (4) of the AWG, and wherein the output waveguides are substantially identically curved in at least a portion of the fan-out region of the AWG. This improves the channel (frequency) spacing accuracy of the AWG. In one embodiment input waveguides (2) of the AWG are also substantially identically curved in at least a portion of the fan-in region of the AWG, these being inversely curved to the substantially identically curved portions of the output waveguides, with respect to the direction of travel of light along the waveguides. This has been found to reduce asymmetry in the channel output response.
    Type: Application
    Filed: December 2, 2003
    Publication date: May 20, 2004
    Inventors: Michael Lanker, Harm Weerden