Patents by Inventor Sophie Dubois

Sophie Dubois 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 of cooling an optical fiber while it is being drawn
    Patent number: 6565775
    Abstract: A method of cooling an optical fiber during drawing through contact with at least one cooling fluid in at least one cooling area, wherein fast cooling, i.e. cooling that is faster than cooling in the surrounding air, from an initial temperature of the fiber to a temperature at the end of fast cooling of said fiber, is followed by slow cooling, i.e. cooling slower than cooling in the surrounding air, from a temperature of said fiber at the start of slow cooling to a temperature of said fiber at the end of slow cooling.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: May 20, 2003
    Assignee: Alcatel
    Inventors: Sophie Dubois, Gérard Orcel, Jean-François Bourhis
  • Preforms and optical fibers coated in alumina and/or silica
    Publication number: 20020006260
    Abstract: The invention relates to an optical fiber preform comprising an optical core, optical cladding, and an outer sheath, in which the outer sheath includes a peripheral zone containing 20% to 100% by weight alumina and 80% to 0% by weight silica. Such a preform makes it possible to obtain optical fibers having improved mechanical strength and improved impermeability to hydrogen.
    Type: Application
    Filed: June 4, 2001
    Publication date: January 17, 2002
    Applicant: ALCATEL
    Inventors: Gerard Orcel, Sophie Dubois, Jean-Florent Campion
  • Method of cooling an optical fiber while it is being drawn
    Publication number: 20010006262
    Abstract: A method of cooling an optical fiber during drawing through contact with at least one cooling fluid in at least one cooling area,
    Type: Application
    Filed: December 15, 2000
    Publication date: July 5, 2001
    Inventors: Sophie Dubois, Gerard Orcel, Jean-Francois Bourhis
  • Preform including a barrier layer preventing hydrogen from diffusing into optical fiber manufactured from said perform, and a method of preparing such a preform
    Patent number: 6201917
    Abstract: An optical fiber preform comprising a core of radius R, and a sheath comprising cladding and outer sheath, wherein the outer sheath comprises an inner zone, and a peripheral zone made of silica doped with alumina and of thickness lying in the range 0.08 R to 2.2 R, and the proportion by weight of alumina in the peripheral zone is such that the equivalent concentration of alumina in the outer sheath as a whole lies in the range 100 ppm to 1000 ppm by weight of aluminum relative to silica. A method of manufacturing said preform, and an associated optical fiber.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: March 13, 2001
    Assignee: Alcatel
    Inventors: Jean-Florent Campion, Sophie Dubois, Gérard Orcel