Patents by Inventor Joseph L. Mantz

Joseph L. Mantz 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).

  • Method for fabricating index-guided semiconductor laser
    Patent number: 5403774
    Abstract: A method of altering a refractive index, as for an optical waveguide, as in a buried heterostructure laser, by inducing disordering in a region of a semiconductor body comprises exposing a surface portion of the semiconductor body to plasma etching, coating at least a part of the surface portion with an oxide layer, heat treating the semiconductor body.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: April 4, 1995
    Assignee: Siemens Corporate Research, Inc.
    Inventors: Chan-Long Shieh, Joseph L. Mantz, Reinhart W. H. Engelmann
  • Broadband quantum well LED
    Patent number: 5126803
    Abstract: An LED having a broadband emission spectrum. In one embodiment, the LED comprises a layered semiconductor structure of length L, the structure including an active layer comprising multiple asymmetric quantum wells. A pair of stripe electrodes is formed on a surface of the structure, to thereby form at least one optical cavity having a pumped length less than L. Currents to the cavities are controlled as a function of temperature to produce broadband emission over a range of temperatures.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: June 30, 1992
    Assignee: The Boeing Company
    Inventors: Harold E. Hager, Joseph L. Mantz