Patents by Inventor Greg Letal

Greg Letal 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).

  • Enhanced efficiency laterally-coupled distributed feedback laser
    Patent number: 7796656
    Abstract: The invention describes the method and apparatus for enhanced efficiency in a laterally-coupled distributed feedback (LC-DFB) laser. In a device featuring the effective ridge design, lateral confinement of the guided optical modes is provided by a surface etched grating, which also serves as a DFB element of the laser. Coupling and quantum efficiency of such a LC-DFB laser both improve with an increase of the lateral mode order. In accordance with this invention, a dramatic enhancement of the laser efficiency is achievable by designing it to operate in one of the higher order modes, notably the first order mode, while all the other lateral modes, including the zero order mode, are suppressed through gain-loss discrimination.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: September 14, 2010
    Assignee: Onechip Photonics Inc.
    Inventors: Chris Watson, Kirill Pimenov, Valery Tolstikhin, Greg Letal, Ron Moore
  • Enhanced efficiency laterally-coupled distributed feedback laser
    Publication number: 20090116522
    Abstract: The invention describes the method and apparatus for enhanced efficiency in a laterally-coupled distributed feedback (LC-DFB) laser. In a device featuring the effective ridge design, lateral confinement of the guided optical modes is provided by a surface etched grating, which also serves as a DFB element of the laser. Coupling and quantum efficiency of such a LC-DFB laser both improve with an increase of the lateral mode order. In accordance with this invention, a dramatic enhancement of the laser efficiency is achievable by designing it to operate in one of the higher order modes, notably the first order mode, while all the other lateral modes, including the zero order mode, are suppressed through gain-loss discrimination.
    Type: Application
    Filed: November 5, 2007
    Publication date: May 7, 2009
    Applicant: OneChip Photonics Inc.
    Inventors: Chris Watson, Kirill Pimenov, Valery Tolstikhin, Greg Letal, Ron Moore