Patents by Inventor Tedros Tsegaye

Tedros Tsegaye 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).

  • Multiple waveguide alignment
    Patent number: 10678004
    Abstract: According to some possible implementations, an optical device may include a plurality of photodiodes, wherein alignment of the plurality of photodiodes with a fixed separation to a plurality of multi-mode waveguides disposed on an optical waveguide chip and with the same fixed separation is optimized by alignment of at least one of the plurality of photodiodes to at least one single-mode waveguide and translation of the optical waveguide chip relative to the plurality of photodiodes by a fixed offset of the at least one single-mode waveguide relative to the plurality of multi-mode waveguides.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: June 9, 2020
    Assignee: Lumentum Operations LLC
    Inventors: Tedros Tsegaye, Barthelemy Fondeur, Dilu He, Kejia Li, Brad Levin
  • MULTIPLE WAVEGUIDE ALIGNMENT
    Publication number: 20200041733
    Abstract: According to some possible implementations, an optical device may include a plurality of photodiodes, wherein alignment of the plurality of photodiodes with a fixed separation to a plurality of multi-mode waveguides disposed on an optical waveguide chip and with the same fixed separation is optimized by alignment of at least one of the plurality of photodiodes to at least one single-mode waveguide and translation of the optical waveguide chip relative to the plurality of photodiodes by a fixed offset of the at least one single-mode waveguide relative to the plurality of multi-mode waveguides.
    Type: Application
    Filed: October 19, 2018
    Publication date: February 6, 2020
    Inventors: Tedros TSEGAYE, Barthelemy Fondeur, Dilu He, Kejia Li, Brad Levin
  • Optical sub-assembly
    Patent number: 7048449
    Abstract: An optical sub-assembly is disclosed, having a mating end adapted to receive a mating fiber, and a back end provided with a converging lens establishing an expanded beam interface with an optical device. The use of an expanded beam interface provides greatly improved stability, and reduces the sensitivity to slight misalignments The optical sub-assembly comprises a receptacle for which the manufacturer thereof has full control over the optical interfaces and refractive index boundaries. The receptacle and the optical device may be manufactured separately.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: May 23, 2006
    Assignee: Finisar Corporation
    Inventors: Krister Fröjdh, Lars-Göte Svenson, Tedros Tsegaye, Mikael Wickström
  • Optical sub-assembly
    Publication number: 20040258364
    Abstract: An optical sub-assembly is disclosed, having a mating end adapted to receive a mating fiber, and a back end provided with a converging lens establishing an expanded beam interface with an optical device. The use of an expanded beam interface provides greatly improved stability, and reduces the sensitivity to slight misalignments The optical sub-assembly comprises a receptacle for which the manufacturer thereof has full control over the optical interfaces and refractive index boundaries. The receptacle and the optical device may be manufactured separately.
    Type: Application
    Filed: August 17, 2004
    Publication date: December 23, 2004
    Inventors: Krister Frojdh, Lars-Gote Svenson, Tedros Tsegaye, Mikael Wickstrom