Patents by Inventor Gretchen R. Phelps

Gretchen R. Phelps 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).

  • Optical rubidium atomic frequency standard
    Patent number: 10684591
    Abstract: An optical atomic clock includes a fiber-coupled electro-optic modulator to phase modulate and suppress residual amplitude modulation of a frequency-doubled laser; a rubidium-enriched vapor cell configured to perform a two-photon transition of rubidium atoms to generate a fluorescence signal from the laser; and a differential lock mechanism to stabilize a frequency of the fluorescence signal to a resonance frequency of the two-photon transition of the rubidium atoms.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: June 16, 2020
    Assignee: THE GOVERNMENT OF THE UNITED STATES OF AMERICA AS REPRESENT BY THE SECRETARY OF THE AIR FORCE
    Inventors: John H. Burke, Nathan D. Lemke, Gretchen R. Phelps, Kyle W. Martin, Benjamin K. Stuhl