Patents by Inventor Mark G. Raizen

Mark G. Raizen 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).

  • Publication number: 20160217964
    Abstract: Systems and methods exposing a sample of atoms to an electromagnetic (EM) field. The EM includes one or more frequencies. The EM field is configured to promote at least a subset of the sample of atoms to one or more excited states based at least upon the one or more frequencies. The one or more excited states are low-lying, metastable states. Furthermore, the subset of the sample of atoms is ionized based at least upon the subset of the sample of atoms being at the one or more excited states.
    Type: Application
    Filed: December 29, 2015
    Publication date: July 28, 2016
    Applicant: Board of Regents, The University of Texas System
    Inventor: Mark G. Raizen
  • Patent number: 8975810
    Abstract: Described herein is a mercury sample that has an isotopic composition that differs from the naturally occurring distribution of isotopes. In various configurations of an isotopically tailored mercury sample, the fraction of one or more isotopes is increased or decreased with respect to the natural fraction(s). A example of a lighting device comprises an envelope, a buffer gas enclosed within the envelope, a isotopically tailored sample of mercury vapor, and a current injection mechanism configured to excite the mercury vapor to emit light. In various configurations, the lighting device emits radiation at a wavelength of 254 nm and/or at a wavelength of 185 nm. In various configurations, the lighting device envelope includes a fluorescent coating that is excited by ultraviolet (UV) light emitted by the mercury vapor. In various configurations, the lighting device provides improved efficiency as compared to lamps employing mercury with a naturally occurring isotope distribution.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: March 10, 2015
    Assignee: Board of Regents, The University of Texas System
    Inventors: Mark G. Raizen, James E. Lawler
  • Publication number: 20140333197
    Abstract: Described herein is a mercury sample that has an isotopic composition that differs from the naturally occurring distribution of isotopes. In various configurations of an isotopically tailored mercury sample, the fraction of one or more isotopes is increased or decreased with respect to the natural fraction(s). A example of a lighting device comprises an envelope, a buffer gas enclosed within the envelope, a isotopically tailored sample of mercury vapor, and a current injection mechanism configured to excite the mercury vapor to emit light. In various configurations, the lighting device emits radiation at a wavelength of 254 nm and/or at a wavelength of 185 nm. In various configurations, the lighting device envelope includes a fluorescent coating that is excited by ultraviolet (UV) light emitted by the mercury vapor. In various configurations, the lighting device provides improved efficiency as compared to lamps employing mercury with a naturally occurring isotope distribution.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 13, 2014
    Applicant: Board of Regents, The University of Texas System
    Inventors: Mark G. Raizen, James E. Lawler
  • Patent number: 8672138
    Abstract: A method for separation of isotopes includes vaporizing a sample having two or more isotopes of the same element. A stream of atoms is generated from the vaporized sample. One or more light waves are applied to the stream. The one or more light waves are tuned to prepare one or more specific isotopes in the flowing stream into a set of one or more magnetic states. A magnetic field is applied to the stream, deflecting atoms in the stream based on their magnetic states. Isotopes are collected based on their deflections (or lack of deflection).
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: March 18, 2014
    Assignee: Board of Regents The University of Texas System
    Inventors: Mark G. Raizen, Bruce G. Klappauf
  • Publication number: 20110278203
    Abstract: This invention provides a process for separating particles. The process is particularly effective in separating particles such as isotopes of a chemical element. In carrying out the process, at least one particle stream that comprises the particles that are to be separated is contacted with a separate carrier gas stream to produce a mixed stream. A portion of the particles in the mixed stream is magnetically activated, and the magnetically activated particles are separated from non-magnetically activated particles the mixed stream.
    Type: Application
    Filed: November 8, 2010
    Publication date: November 17, 2011
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Mark G. Raizen, Melissa Jerkins, Isaac Chavez, Uzi Even
  • Patent number: 4951286
    Abstract: Squeezed states of light having significant degrees of squeezing are achieved with modest values of atomic density and intracavity electromagnetic (EM) field by a device and method for coupling the EM field within the optical cavity. An oscillatory exchange of excitation then occurs between the atomic polarization and the EM field within the cavity.
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: August 21, 1990
    Assignee: The University of Texas System
    Inventors: Harry J. Kimble, Mark G. Raizen, Luis A. Orozco