Patents by Inventor Stefan Hammerfeldt

Stefan Hammerfeldt 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).

  • Waveguide for extraction of light at low levels of reflection
    Patent number: 9921370
    Abstract: A waveguide for the extraction of light at low levels of reflection arranged to guide light from an electro-optical component on a chip to a facet on the chip for extraction includes a first part and a second part. The first part (4) is extended, the second part (5) includes a surface (JK) through which the light exits from the waveguide (1). A non-adiabatic longitudinal section (GHLM) is located after the first part (4) but before the surface (JK) in the direction of propagation of the light, and the surface (JK) forms in the plane of the chip a first angle (V1) with the optical axis (A) of the first part (4) that lies between 5 and 80 degrees.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: March 20, 2018
    Assignee: SYNTUNE AB
    Inventors: Jan-Olof Wesstrom, Per Granestrand, Stefan Hammerfeldt
  • WAVEGUIDE FOR EXTRACTION OF LIGHT AT LOW LEVELS OF REFLECTION
    Publication number: 20110222816
    Abstract: A waveguide for the extraction of light at low levels of reflection arranged to guide light from an electro-optical component on a chip to a facet on the chip for extraction includes a first part and a second part. The first part (4) is extended, the second part (5) includes a surface (JK) through which the light exits from the waveguide (1). A non-adiabatic longitudinal section (GHLM) is located after the first part (4) but before the surface (JK) in the direction of propagation of the light, and the surface (JK) forms in the plane of the chip a first angle (V1) with the optical axis (A) of the first part (4) that lies between 5 and 80 degrees.
    Type: Application
    Filed: September 17, 2009
    Publication date: September 15, 2011
    Applicant: SYNTUNE AB
    Inventors: Jan-Olof Wesstrom, Per Granestrand, Stefan Hammerfeldt