Patents by Inventor Frank Zgymunt Hawrylo

Frank Zgymunt Hawrylo 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).

  • Lateral mode control in semiconductor lasers
    Patent number: 4122410
    Abstract: A semiconductor laser capable of fundamental lateral mode operation, includes a region of high conductivity in the form of a stripe in a semiconductor body and at a contacting surface of the body. The high conductivity region is between and contiguous to a pair of spaced regions also in the body and at the contacting surface. The pair of spaced regions are of a lower conductivity than the high conductivity region. The low and high conductivity regions are in electrical contact with a stripe contact and provide a focused current distribution from the stripe contact which is compatible with fundamental lateral mode operation of the laser.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: October 24, 1978
    Assignee: RCA Corporation
    Inventors: Henry Kressel, Frank Zgymunt Hawrylo