Patents by Inventor Petras V. Avizonis

Petras V. Avizonis 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).

  • Fiber amplifier having a non-doped inner core and at least one doped gain region
    Patent number: 6965469
    Abstract: A fiber amplifier includes at least one longitudinally extending non-doped inner core capable of transmitting signals. At least partially surrounding the inner core and extending at least partially therealong, the fiber amplifier also includes at least one gain region capable of amplifying signals propagating therethrough. The fiber amplifier also includes an outer core surrounding the gain region and the inner core and extending longitudinally therealong. The outer core is capable of transmitting pump energy such that the pump energy at least partially amplifies signals propagating through the inner core according to a nonlinear amplification process, such as a Raman or a Brillouin amplification process.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: November 15, 2005
    Assignee: The Boeing Company
    Inventors: Petras V. Avizonis, James A. Davis, David Whelan
  • Fiber amplifier having a non-doped inner core and at least one doped gain region
    Publication number: 20040095968
    Abstract: A fiber amplifier includes at least one longitudinally extending non-doped inner core capable of transmitting signals. At least partially surrounding the inner core and extending at least partially therealong, the fiber amplifier also includes at least one gain region capable of amplifying signals propagating therethrough. The fiber amplifier also includes an outer core surrounding the gain region and the inner core and extending longitudinally therealong. The outer core is capable of transmitting pump energy such that the pump energy at least partially amplifies signals propagating through the inner core according to a nonlinear amplification process, such as a Raman or a Brillouin amplification process.
    Type: Application
    Filed: November 20, 2002
    Publication date: May 20, 2004
    Applicant: The Boeing Company
    Inventors: Petras V. Avizonis, James A. Davis, David Whelan
  • Optical sight apparatus for firing from cover positions
    Patent number: 6643969
    Abstract: Aiming apparatus rotatably attachable to optical sights e.g. conventional optical or laser sights which selectively permits the aiming of a weapon from a variety of cover positions. More specifically, aiming apparatus which may be field switched from an “aim from cover” mode to a conventional aim mode and which is connectable to a weapon sight in a 360 degree rotatable manner.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: November 11, 2003
    Assignee: Exponent, Inc.
    Inventor: Petras V. Avizonis, Jr.
  • Weapon accessory mounting apparatus
    Patent number: 6606813
    Abstract: Apparatus for mounting optical sights or other weapon accessories which locates the weapon accessories (e.g. optical sights, laser range finders, night scopes, etc.) at a reduced distance relative to the position of the barrel of a weapon.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: August 19, 2003
    Assignee: Exponent, Inc.
    Inventors: Mark D. Squire, Petras V. Avizonis, Jr., Attilio Gerald Scotese, Todd David Carey
  • Dynamically matched optical filtering in a multiple telescope imaging system
    Patent number: 4856884
    Abstract: A dynamically matched optical filter is formed within a multiple telescope optical imaging system. Entrance and exit pupil geometries, the phases and tilts of multiple imaging paths and system alignments are sensed and controlled to allow wide field of view imaging and the enhancement or suppression of certain spatial frequencies of interest.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: August 15, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Janet S. Fender, Petras V. Avizonis