Patents by Inventor Eugene Duda

Eugene Duda 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).

  • Patent number: 5121451
    Abstract: A DFB laser (2) is coupled to a monomode line fiber (14) via an isolator constituted by a Faraday rotator crystal (4) and a polarizing fiber (10) which is welded to a fiber to be coupled (14). A focusing lens (8) is integrated in an intermediate block including the rotator crystal (4) and a permanent magnet (6). The invention is particularly suitable for making light-emitting heads for use in optical fiber telecommunications systems.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: June 9, 1992
    Assignee: Alcatel Cit
    Inventors: Emmanuel Grard, Daniel Mousseaux, Jean-Luc Beylat, Jacques Auge, Jean-Jacques Guerin, Eugene Duda
  • Patent number: 4966438
    Abstract: The invention relates in particular to polarizing light whose angle of incidence may vary substantially, e.g. over .+-.10.degree.. A polarizing stack (22) constituted by dielectric layers (30, 31, 32, 33, 34, . . . ) is formed on an oblique face (4). It is in the form of a repetitive sucession of symmetrical sequences (30, 31, 40) each constituted by two half-thickness low refractive index layers (30, 40) on either side of a high refracture index layer (31). The invention is particularly applicable to polarizing the light emitted by a semiconductor laser.
    Type: Grant
    Filed: April 4, 1989
    Date of Patent: October 30, 1990
    Assignee: Societe Anonyme dite: Alcatel Cit
    Inventors: Jacques Mouchart, Jacqueline Begel, Eugene Duda
  • Patent number: 4728787
    Abstract: A process of aligning electro-optical devices that associate a semiconductor, laser diode or electroluminescent component with an optical component, such as an optical fiber. These devices must be aligned with a precision of from .+-.1 to .+-.10.mu.. The semiconductor component is integral with a centering part through the intermediary of a first bracket. The optical component, through the intermediary of a second bracket, is integral with a container in which is placed a hardening material. The centering part is plunged in the hardening material, with three degrees of mobility. The alignment is dynamic. When adjustment has been made, the hardening material is rapidly and rigidly fixed.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: March 1, 1988
    Assignee: Thomson-CSF
    Inventors: Raymond Henry, Jean C. Carballes, Eugene Duda, Emmanuel Grard
  • Patent number: 4411057
    Abstract: The invention relates to laser sources using a semiconductor chip from which the radiation is collected by an optical fiber. In accordance with the invention there is provided a laser source in which the support for the semiconductor chip and the optical fiber is metallic. The support is stamped with an impression comprising a seat for the semiconductor chip and at least one groove for accommodating the optical fiber. The invention is applicable to radiation sources used in optical telecommunication systems.
    Type: Grant
    Filed: October 20, 1981
    Date of Patent: October 25, 1983
    Assignee: Thomson-CSF
    Inventors: Eugene Duda, Claude Tondu, Alain Maumy
  • Patent number: 4321617
    Abstract: A GaAs diode and a copper base are joined together so as to form a soldered system comprising an indium layer inserted between two tungsten layers which serve as a barrier for preventing indium diffusion. A thin gold or platinum wetting layer is applied to the tungsten layers to aid in adherence of the solder to the tungsten without the impairment of the indium during soldering operations due to alloying. The invention is applicable to optical-fiber telecommunication systems.
    Type: Grant
    Filed: July 19, 1979
    Date of Patent: March 23, 1982
    Assignee: Thomson-CSF
    Inventors: Eugene Duda, Alain Maumy, Claude Tondu
  • Patent number: 4288528
    Abstract: An improved process for forming an embossed pattern through the use of a writing concentrated beam opening holes in a film capable of undergoing residue free evaporation. A layer of photoresist is overlayed with the film and upon being exposed and processed the layer supplies the prospective embossed pattern.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: September 8, 1981
    Assignee: Thomson-CSF
    Inventors: Jean E. Picquendar, Michel Marchal, Jean C. Dubois, Eugene Duda