Patents by Inventor Roger S. Putnam

Roger S. Putnam 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).

  • Pulsed laser
    Patent number: 5052013
    Abstract: A pulsed source of laser light (10) includes a diffraction grating (20) that splits light received from a laser output mirror (12) into a plurality of paths that lead to respective laser gain cells (14.sub.1, 14.sub.2, . . ., 14.sub.n). The gain cells individually amplify light components of different respective wavelengths and reflect them back to the diffraction grating (20), which reassembles them into a single beam for transmission to the laser output mirror (12). A mode locker (24), preferably in the form of a saturable absorber, locks the output components into equally spaced frequencies so that the sum of the individual continuous components will be a pulsed signal.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: September 24, 1991
    Inventor: Roger S. Putnam
  • Switched holograms for reconfigurable optical interconnect
    Patent number: H738
    Abstract: A device that provides reconfigurable optical interconnections of multiple ata channels that have applications in highly parallel computers. The device utilizes an array of optical switches which direct a set of optical beams toward any one of a selection of holograms and each hologram when selected deflects the input beams toward a detector.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: February 6, 1990
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: J. Barry McManus, Roger S. Putnam, H. John Caulfield