Patents by Inventor Hans Kragl

Hans Kragl 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: 5574806
    Abstract: A method for producing a hybrid integrated optical circuit which utilizes a molding tool having holding devices for an electrooptic semiconductor component and negative molds for a waveguide trench and holding devices for an optical waveguide. The holding devices of the molding tool adjust the electrooptic semiconductor component with respect to the negative mold of the waveguide trench during reshaping with a polymer. The basic unit produced consists of the electrooptic semiconductor component, which is adjusted with respect to the waveguide trench molded in the polymer. Adjoining the waveguide trench are holding devices, which are molded in the polymer and by means of which an optical waveguide can be coupled to the waveguide trench in a self-adjusting fashion. The basic unit and the optical waveguide are permanently connected to one another with the aid of a cover, the waveguide trench being filled with an optically transparent material, as a result of which a waveguide is formed.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: November 12, 1996
    Assignee: Robert Bosch GmbH
    Inventors: Hans Kragl, Wolf-Henning Rech
  • Patent number: 5475519
    Abstract: An integrated-optical circuit receives optical signals and modulates and reflects incoming optical signals. The integrated-optical circuit includes a light guide with at least one Bragg resonator evanescently coupled to light guides and a photocell coupled to a Bragg resonator as well as a modulating device that modulates and reflects an additional optical signal that is received.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: December 12, 1995
    Assignee: Robert Bosch GmbH
    Inventors: Hans Kragl, Wolf-Henning Rech, Jens Weber
  • Patent number: 5475775
    Abstract: A method for producing a hybrid integrated optical circuit which utilizes a molding tool having holding devices for an electrooptic semiconductor component, negative molds for a waveguide trench and holding devices for an optical waveguide. The holding devices of the molding tool adjust the electrooptic semiconductor component with respect to the negative mold of the waveguide trench during reshaping with a polymer. The basic unit produced consists of the electrooptic semiconductor component, which is adjusted with respect to the waveguide trench molded in the polymer. Adjoining the waveguide trench are holding devices, which are molded in the polymer and by means of which an optical waveguide can be coupled to the waveguide trench in a self-adjusting fashion. The basic unit and the optical waveguide are permanently connected to one another with the aid of a cover, the waveguide trench being filled with an optically transparent material, as a result of which a waveguide is formed.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: December 12, 1995
    Assignee: Robert Bosch GmbH
    Inventors: Hans Kragl, Wolf-Henning Rech
  • Patent number: 5471551
    Abstract: A component to be used for the frequency-selective modulation and/or for the frequency-selective receiving and demodulation of frequency-division multiplexed optical signals. The component of the present invention includes a waveguide, to which multiplexed optical signals are applied, and at least one further waveguide, running substantially parallel to the waveguide and which is evanescently coupled to the waveguide. The at least one further waveguide is designed as a Bragg resonator, by means of a structuring in the longitudinal direction, and the component further includes at least one semiconductor diode, which is optically coupled to the Bragg resonator.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: November 28, 1995
    Assignee: Robert Bosch GmbH
    Inventors: Hans Kragl, Jens Weber
  • Patent number: 5454055
    Abstract: A method for making a cover for an integrated optical circuit, a cover for an integrated optical circuit, and an integrated optical circuit made with this cover are proposed. The method serves to minimize the effort and expense in integrating optical components in fiberoptical systems. An optical element 29 is placed in a molding die (10) with adjusting elements (13) that adjust the optical component (29) in its position, and a curable liquid is cast all around the optical component (29), and after it solidifies, this liquid forms the cover (25).
    Type: Grant
    Filed: May 10, 1994
    Date of Patent: September 26, 1995
    Assignee: Robert Bosch GmbH
    Inventors: Hans Kragl, Wolf-Henning Rech, Hergo H. Wehmann
  • Patent number: 5434935
    Abstract: In an integrated optical circuit with waveguides applied on a substrate, a layer of high conductivity and a layer of lower index of refraction than the waveguides are arranged between the substrate and the waveguide cores. The circuit permits a favorable coupling of opto-electronic components arranged in the substrate with the waveguides and it can be manufactured by well-known methods.
    Type: Grant
    Filed: December 20, 1993
    Date of Patent: July 18, 1995
    Assignee: Robert Bosch GmbH
    Inventor: Hans Kragl