Patents by Inventor Federico Lucchi

Federico Lucchi 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).

  • Method and structure of electric field poling of Ti indiffused LiNbOsubstrates without the use of grinding process
    Patent number: 7155102
    Abstract: A method and structure are disclosed with a simplified approach for fabricating a LiNbO3 wafer with Ti indiffusion wafeguide on the surface that is domain inverted. The method involves indiffusing Ti into LiNbO3 with a predefined temperature and time indiffusion range, a Li enriched and dry oxygen atmosphere, which allows making optical waveguides on the z? crystal face without any significant domain inversion occurring on the z+ face of the crystal. This allows for subsequent poling without the need of any additional removal of the thin domain inverted layer which would otherwise appear on the z+ face. Even in instance where a thin domain inversion layer is formed, it is insufficient thick to prevent poling, eliminating the need for the grinding process.
    Type: Grant
    Filed: June 19, 2004
    Date of Patent: December 26, 2006
    Assignee: Avanex Corporation
    Inventors: Valerio Pruneri, Federico Lucchi, Paolo Vergani
  • Method and structure of electric field poling of Ti indiffused LiNbO3 substrates without the use of grinding process
    Publication number: 20050281523
    Abstract: A method and structure are disclosed with a simplified approach for fabricating a LiNbO3 wafer with Ti indiffusion wafeguide on the surface that is domain inverted. The method involves indiffusing Ti into LiNbO3 with a predefined temperature and time indiffusion range, a Li enriched and dry oxygen atmosphere, which allows making optical waveguides on the z? crystal face without any significant domain inversion occurring on the z+ face of the crystal. This allows for subsequent poling without the need of any additional removal of the thin domain inverted layer which would otherwise appear on the z+ face. Even in instance where a thin domain inversion layer is formed, it is insufficient thick to prevent poling, eliminating the need for the grinding process.
    Type: Application
    Filed: June 19, 2004
    Publication date: December 22, 2005
    Applicant: Avanex Corporation
    Inventors: Valerio Pruneri, Federico Lucchi, Paolo Vergani