Patents by Inventor John J. Donoghue

John J. Donoghue 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).

  • Self-pumped optical phase conjugation with a sodium Raman laser
    Patent number: 5377210
    Abstract: A three-level atomic system in a resonance Raman configuration is provided, and self-pumped optical phase conjugation is performed in which the pumps are self-induced as standing waves in a Raman laser. Self-pumped reflectivities approaching five percent are obtained for input intensities of 20 watts per square cm. This low optical input intensity combined with predicted submicrosecond response times indicates that the resonant Raman interaction may provide the basis for a promising new class of non-linear optical materials.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: December 27, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Philip R. Hemmer, Jonathan S. Kane, John J. Donoghue