Patents by Inventor Daniel E. Janssen

Daniel E. Janssen 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).

  • Atomic frequency standard based upon coherent population trapping
    Patent number: 6265945
    Abstract: An atomic frequency standard is disclosed where optical pumping of the resonance cell is achieved by coherent light and the pumping results in Coherent Population Trapping of the resonant alkali metal atoms. The fabrication of frequency standards of substantially reduced size and weight is permitted by use of solid state laser sources having certain integrated optical modifier elements and a resonance cell of metallic construction.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: July 24, 2001
    Assignee: Kernco, Inc.
    Inventors: Michael J. Delaney, Kristin N. Bonnette, Daniel E. Janssen
  • Optically pumped atomic frequency standard
    Patent number: 6222424
    Abstract: An improved optically pumped atomic frequency standard in which excitation light intensity entering the resonance cell is controlled and maintained independently of the optical pump.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: April 24, 2001
    Assignee: Kernco, Inc.
    Inventors: Daniel E. Janssen, Martin W. Levine