Patents by Inventor Hatem Abdelkader

Hatem Abdelkader 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).

  • Polarization controlled tuneable ring laser
    Patent number: 5588013
    Abstract: The present invention relates to a tuneable ring laser with an output having a fixed, stable linear state of polarization with a fixed and known azimuth. The state of polarization at the output is fixed by compensating for component birefringence of the various ring elements that alter the polarization state and azimuth.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: December 24, 1996
    Assignee: The Whitaker Corporation
    Inventors: Paul Reitz, Hatem Abdelkader
  • Planar hybrid optical amplifier
    Patent number: 5555127
    Abstract: A planar hybrid optical amplifier is fabricated on a single crystal substrate. The components that are common to a variety of optical amplifier circuits are mounted on the substrate and the planar device that results is readily interchanged in various applications. In one embodiment the multiplexed signal consisting of light from a pump laser and an optical signal are introduced into a rare earth doped fiber which amplifies the input signal through stimulated emission of radiation.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: September 10, 1996
    Assignee: The Whitaker Corporation
    Inventors: Hatem Abdelkader, Robert A. Boudreau, Terry P. Bowen, Hongtao Han, Narinder Kapany, Paul R. Reitz
  • Fiber optic ring laser
    Patent number: 5469455
    Abstract: The present invention relates to a tuneable ring laser with an output having a fixed, stable linear state of polarization with a fixed and known azimuth. The state of polarization at the output is fixed by careful splice and component orientation that compensates for component birefringence of the various ring elements that alter the polarization state and azimuth. Further, such polarization transformation is minimized by careful deployment of the non-polarization component.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: November 21, 1995
    Assignee: The Whitaker Corporation
    Inventors: Paul Reitz, Hatem Abdelkader