Patents by Inventor Yvon Sorel

Yvon Sorel 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 communications system using travelling wave semiconductor optical amplifiers
    Patent number: 5515193
    Abstract: Optical communications system using traveling wave semiconductor optical amplifiers has at lest one optical fiber (2), tranceivers, (S1. . . , SN) placed along the fiber and having in each case at least one travelling wave semiconductor optical amplifier (A1. . . , AN), which is located in series with the fiber and transmission means (L1, L2) for feeding into the fiber at least one continuous optical signal. Each amplifier is used alternately to modulate the continuous optical signal in order to transmit information, and to detect information modulations of the optical signal which carry information.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: May 7, 1996
    Assignee: France Telecom Etablissement autonome de droit public
    Inventors: Yvon Sorel, Jean-Claude Simon, Rene Auffret
  • Rapidly reconfigurable wavelength multiplexing device
    Patent number: 5245681
    Abstract: A wavelength multiplexing device comprising a switching matrix (18) of the N to 1 type, which has several successive stages (18a,18b) of controllable optical couplers (20) interconnected to form a tree structure and modulating means (24) connected to the output of the switching matrix (18). The device further has N sources (10,12,14,16) each emitting a continuous light beam having a particular wavelength to an input of the matrix, and a control circuit (22) connected to the couplers and controlling the latter so as to select P wavelengths from among the N available wavelengths. The device allows efficient transmission of data through an optical network.
    Type: Grant
    Filed: March 25, 1992
    Date of Patent: September 14, 1993
    Assignee: France Telecom Etablissement Autonome de Droit Public
    Inventors: Philippe Guignard, Yvon Sorel, Jean-Francois Kerdiles
  • Device for continuously tuning a coherent and rectilinearly polarized light source
    Patent number: 5121399
    Abstract: Device able to continuously tune a coherent and rectilinearly polarized light source. It includes an electro-optical device (5) forming a spectral filter with an electrically modulable transfer function, this electro-optical device being provided so as to select a particular longitudinal mode from all the longitudinal modes able to oscillate inside the external cavity for which the source (1) is provided and which is ended by a reflecting device (3) towards the source of the light emitted by this source, and an electro-optical device (4) for varying the optical length of the cavity, this variation device being placed in the cavity and provided so as to continuously move the position of the selected longitudinal mode, each electro-optical device including a compact electro-optical crystal.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: June 9, 1992
    Assignee: French State represented by the Minister of Post, Telecommunications, and Space (Centre National d'Etudes des Telecommunications)
    Inventors: Yvon Sorel, Jean-Francois Kerdiles, Jean-Pierre Goedgebuer, Henri Porte
  • Infrared light source incorporating a semiconductor laser associated with mode selection and power control means
    Patent number: 4630278
    Abstract: A laser infrared light source is mounted on a mount, a mirror ensuring the mode selection, a photodetector being positioned behind the mirror and connected thereto by an optical fibre and a fibre guiding the useful beam. These element are held by resin supports resting on a base plate.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: December 16, 1986
    Inventors: Rene Auffret, Rene Le Marer, Yvon Sorel