Patents by Inventor Anne Legrand

Anne Legrand 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 amplifier, transmission system and method for optimization
    Patent number: 7057801
    Abstract: The invention is related to an optical amplifier connected to a pump laser with lengths of fibers and isolators between the lengths of fibers. The invention is also related to a transmission system using this amplifier and in addition the invention gives also a rule to optimize the position of isolators in a amplifier.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: June 6, 2006
    Assignee: Alcatel
    Inventors: Anne Legrand, Dominique Bayart
  • Parametric amplifier with adjustable pump source
    Patent number: 7042635
    Abstract: The invention is related to a parametric amplifier connected to a pump laser with a control device for adapt the pump laser. This amplifier is used in a transmission system. In addition the invention comprises a method for controlling the pump laser source in an iterative process to optimize the gain of the amplifier.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: May 9, 2006
    Assignee: Alcatel
    Inventors: Anne Legrand, Dominique Bayart
  • Optical amplifier
    Patent number: 7038838
    Abstract: An optical amplifier is proposed which has an optical waveguide structure) through which signal light and pump light are propagated. The optical waveguide structure has a core with a relatively high refractive index and a clad with a relatively low refractive index, where at least said core exhibits a nonlinear response of second or third order. In a result optical parametric amplification of said signal light is achieved. The amplifier has separate idler light filters for attenuating idler light, which is generated in the process of optical parametric amplification, The position of the idler light filters can be defined placed in said optical waveguide structure at a defined length Lmax.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: May 2, 2006
    Assignee: Alcatel
    Inventors: Dominique Bayart, Anne Legrand
  • Parametric amplifier with adjustable pump source
    Publication number: 20040263951
    Abstract: The invention is related to a parametric amplifier connected to a pump laser with a control device for adapt the pump laser. This amplifier is used in a transmission system. In addition the invention comprises a method for controlling the pump laser source in an iterative process to optimize the gain of the amplifier.
    Type: Application
    Filed: June 8, 2004
    Publication date: December 30, 2004
    Applicant: ALCATEL
    Inventors: Anne Legrand, Dominique Bayart
  • Optical amplifier, transmission system and method for optimization
    Publication number: 20040257641
    Abstract: The invention is related to an optical amplifier connected to a pump laser with lengths of fibers and isolators between the lengths of fibers. The invention is also related to a transmission system using this amplifier and in addition the invention gives also a rule to optimize the position of isolators in a amplifier.
    Type: Application
    Filed: June 18, 2004
    Publication date: December 23, 2004
    Applicant: ALCATEL
    Inventors: Anne Legrand, Dominique Bayart
  • Optical amplifier
    Publication number: 20040196533
    Abstract: An optical amplifier is proposed which has an optical waveguide structure) through which signal light and pump light are propagated. The optical waveguide structure has a core with a relatively high refractive index and a clad with a relatively low refractive index, where at least said core exhibits a nonlinear response of second or third order. In a result optical parametric amplification of said signal light is achieved. The amplifier has separate idler light filters for attenuating idler light, which is generated in the process of optical parametric amplification, The position of the idler light filters can be defined placed in said optical waveguide structure at a defined length Lmax.
    Type: Application
    Filed: July 28, 2003
    Publication date: October 7, 2004
    Applicant: ALCATEL
    Inventors: Dominique Bayart, Anne Legrand