Patents by Inventor Demetrios Nicolau Christodoulides

Demetrios Nicolau Christodoulides 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).

  • Optical transmission link incorporating highpass optical filtering
    Patent number: 6466712
    Abstract: An optical fiber transmission link with reduced channel depletion due to stimulated Raman scattering is formed by including a high pass optical filter in the transmission fiber. The filter may comprise one or more discrete components, or may be formed as a “distributed” filter along the length of the optical fiber. The cut-off frequency for the high pass optical filter is selected to be immediately below the frequency of the input channel to be transmitted. When used in an arrangement with multiple input channels, the cut-off frequency is controlled to be immediately below the lowest input channel frequency.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: October 15, 2002
    Assignees: Lucent Technologies Inc., Lehigh University
    Inventors: Demetrios Nicolau Christodoulides, Jean-Marc Pierre Delavaux, Christopher Michael McIntosh, Jean Toulouse
  • Raman amplifier with gain enhancement from optical filtering
    Patent number: 6388800
    Abstract: A fiber Raman amplifier with increased gain and improved pump conversion efficiency is formed by including a high pass optical filter in the amplifier structure. The filter may comprise one or more discrete components, or may be formed as a “distributed” filter along the length of the fiber amplifier. The cut-off frequency for the high pass optical filter is selected to be immediately below the frequency of the input signal to be amplified. When used in an arrangement with multiple input signals, the cutoff frequency is controlled to be immediately below the lowest input signal frequency.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: May 14, 2002
    Assignees: Lucent Technologies Inc., Lehigh University
    Inventors: Demetrios Nicolau Christodoulides, Jean-Marc Pierre Delavaux, Christopher Michael McIntosh, Jean Toulouse