Patents by Inventor Thomas Spence

Thomas Spence 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).

  • Cavity-locked ring down spectroscopy
    Patent number: 6084682
    Abstract: Distinct locking and sampling light beams are used in a cavity ring-down spectroscopy (CRDS) system to perform multiple ring-down measurements while the laser and ring-down cavity are continuously locked. The sampling and locking light beams have different frequencies, to ensure that the sampling and locking light are decoupled within the cavity. Preferably, the ring-down cavity is ring-shaped, the sampling light is s-polarized, and the locking light is p-polarized. Transmitted sampling light is used for ring-down measurements, while reflected locking light is used for locking in a Pound-Drever scheme.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: July 4, 2000
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Richard N. Zare, Barbara A. Paldus, Charles C. Harb, Thomas Spence