Patents by Inventor Mark H. Slonecker

Mark H. Slonecker 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 apparatus for securing information communicated through optical fibers
    Patent number: 4973169
    Abstract: This invention relates to a technique for protecting information from intrusion that is transmitted through optical fiber. The new method relates to transmitting energy at multiple wavelengths along a single mode optical fiber. The wavelengths can be propagated in single mode or alternatively n single mode or in high order modes. Energy at one or more wavelengths constitutes guard channels which have an enhanced power loss effect by selection of an appropriate cut-off wavelength of the single mode optical fiber. These guard channels can be monitored for power loss to detect intrusion. An apparatus is also described.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: November 27, 1990
    Assignee: Martin Marietta Corporation
    Inventor: Mark H. Slonecker