Patents by Inventor Stéphane Guerandel

Stéphane Guerandel 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 for modulating an atomic clock signal with coherent population trapping and corresponding atomic clock
    Patent number: 7501906
    Abstract: Method for modulating an atomic clock signal and a corresponding atomic clock. The laser beams (L1, L2) are pulse-modulated in amplitude to illuminate (A) an interactive medium. A detection (B) of the current pulse (Sr) and of the pulses (Sr?1 to Sr?p) preceding said current impulsion is performed. The pulses are superimposed (C) by linear combination to generate a compensated atomic clock signal (SHC) whereof the spectral width is minimized. The invention is applicable to atomic clocks with pulsed interrogation whereof the interactive medium consists of thermal or laser-cooled atoms.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: March 10, 2009
    Assignee: Centre National de la Recherche Scientifique- C.N.R.S
    Inventors: Noël Dimarcq, Stéphane Guerandel, Thomas Zanon, David Holleville
  • Method For Modulating An Atomic Clock Signal With Coherent Population Trapping And Corresponding Atomic Clock
    Publication number: 20070200643
    Abstract: Method for modulating an atomic clock signal and a corresponding atomic clock. The laser beams (L1, L2) are pulse-modulated in amplitude to illuminate (A) an interactive medium. A detection (B) of the current pulse (Sr) and of the pulses (Sr?1 to Sr?p) preceding said current impulsion is performed. The pulses are superimposed (C) by linear combination to generate a compensated atomic clock signal (SHC) whereof the spectral width is minimized. The invention is applicable to atomic clocks with pulsed interrogation whereof the interactive medium consists of thermal or laser-cooled atoms.
    Type: Application
    Filed: March 29, 2005
    Publication date: August 30, 2007
    Inventors: Noel Dimarcq, Stephane Guerandel, Thomas Zanon, David Holleville