Patents by Inventor Rafael Ben-Michael

Rafael Ben-Michael 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).

  • Tapered beam expander waveguide integrated with a diode lasesr
    Patent number: 5720893
    Abstract: The present invention is directed to a semiconductor waveguiding structure which includes a) a first semiconductor waveguiding layer formed on a substrate, b) a barrier layer that is formed on the first semiconductor waveguiding layer, and that is resistant to a selected etchant, and c) a second semiconductor waveguiding layer that is etched using the selected etchant such that its width is tapered along its length to a pointed edge. A separate etching of the first semiconductor layer is performed to form each sidewall of the first semiconductor layer. The intersection of those sidewalls defines the pointed edge which has a radius of curvature of less than 500 Angstroms.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: February 24, 1998
    Assignee: Lucent Technologies Inc.
    Inventors: Rafael Ben-Michael, Uziel Koren
  • Tapered beam expander waveguide integrated with a diode laser
    Patent number: 5574742
    Abstract: The present invention is directed to a semiconductor waveguiding structure which includes a) a first semiconductor waveguiding layer formed on a substrate, b) a barrier layer that is formed on the first semiconductor waveguiding layer, and that is resistant to a selected etchant, and c) a second semiconductor waveguiding layer that is etched using the selected etchant such that its width is tapered along its length to a pointed edge. A separate etching of the first semiconductor layer is performed to form each sidewall of the first semiconductor layer. The intersection of those sidewalls defines the pointed edge which has a radius of curvature of less than 500 Angstroms.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: November 12, 1996
    Assignee: Lucent Technologies Inc.
    Inventors: Rafael Ben-Michael, Uziel Koren