Patents by Inventor Gaia Cevini

Gaia Cevini 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).

  • Optical mode transformer, in particular for coupling an optical fiber and a high-index contrast waveguide
    Patent number: 8320721
    Abstract: An optical mode transformer comprises a first waveguide including a first core, a first cladding and an end facet configured to be coupled to an optical fiber. The transformer further includes a second waveguide comprising a second core, a second cladding and an end directly coupled to an end of the first waveguide. A third waveguide comprises a third core and a third cladding, and is arranged with respect to the second waveguide so as to realize an evanescent optical coupling with the second waveguide. The third core includes a tapered region wherein evanescent coupling takes place, and wherein a refractive index contrast of the first waveguide is less than a refractive index contrast of the second waveguide, the refractive index contrast of the second waveguide is less than a refractive index contrast of the third waveguide, and the refractive index contrast of the third waveguide is not less than 18%.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 27, 2012
    Assignee: Google Inc.
    Inventors: Gaia Cevini, Paola Galli, Stefano Lorenzotti, Marco Piazza, Marco Romagnoli, Luciano Socci, Lorenzo Bolla, Silvia Ghidini
  • OPTICAL MODE TRANSFORMER, IN PARTICULAR FOR COUPLING AN OPTICAL FIBER AND A HIGH-INDEX CONTRAST WAVEGUIDE
    Publication number: 20110116741
    Abstract: An optical mode transformer comprises a first waveguide including a first core, a first cladding and an end facet configured to be coupled to an optical fiber. The transformer further includes a second waveguide comprising a second core, a second cladding and an end directly coupled to an end of the first waveguide. A third waveguide comprises a third core and a third cladding, and is arranged with respect to the second waveguide so as to realize an evanescent optical coupling with the second waveguide. The third core includes a tapered region wherein evanescent coupling takes place, and wherein a refractive index contrast of the first waveguide is less than a refractive index contrast of the second waveguide, the refractive index contrast of the second waveguide is less than a refractive index contrast of the third waveguide, and the refractive index contrast of the third waveguide is not less than 18%.
    Type: Application
    Filed: February 29, 2008
    Publication date: May 19, 2011
    Inventors: Gaia Cevini, Paola Galli, Stefano Lorenzotti, Marco Piazza, Marco Romagnoli, Luciano Socci, Lorenzo Bolla, Silvia Ghidini