Patents by Inventor Sangkoo F. Hahn

Sangkoo F. Hahn 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).

  • Dynamic time expansion and compression using nonlinear waveguides
    Patent number: 6753741
    Abstract: Dynamic time expansion or compression of a small-amplitude input signal generated with an initial scale is performed using a nonlinear waveguide. A nonlinear waveguide having a variable refractive index is connected to a bias voltage source having a bias signal amplitude that is large relative to the input signal to vary the reflective index and concomitant speed of propagation of the nonlinear waveguide and an electrical circuit for applying the small-amplitude signal and the large amplitude bias signal simultaneously to the nonlinear waveguide. The large amplitude bias signal with the input signal alters the speed of propagation of the small-amplitude signal with time in the nonlinear waveguide to expand or contract the initial time scale of the small-amplitude input signal.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: June 22, 2004
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Alp T. Findikoglu, Sangkoo F. Hahn, Quanxi Jia