Patents by Inventor Harry L. T. Lee

Harry L. T. Lee 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 and apparatus for generating frequency modulated pulses
    Patent number: 6834134
    Abstract: A method and apparatus are provided for generating short (e.g., picosecond) pulses using a 2 section 1553 nm DBR laser without gain switching nor external modulation. The center wavelength of the DBR section is modulated at 0.5 GHz to generate a constant amplitude frequency modulated optical wave Large group velocity dispersion is then applied with a chirped fiber Bragg grating to convert the FM signal to a pulse stream.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: December 21, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: James F. Brennan, III, Patrick C. Chou, Harry L. T. Lee, Rajeev J. Ram, Hermann A. Haus, Erich P. Ippen
  • Method and apparatus for generating frequency modulated pulses
    Publication number: 20010036332
    Abstract: A method and apparatus are provided for generating short (e.g., picosecond) pulses using a 2 section 1553 nm DBR laser without gain switching nor external modulation. The center wavelength of the DBR section is modulated at 0.5 GHz to generate a constant amplitude frequency modulated optical wave Large group velocity dispersion is then applied with a chirped fiber Bragg grating to convert the FM signal to a pulse stream.
    Type: Application
    Filed: March 23, 2001
    Publication date: November 1, 2001
    Applicant: 3M Innovative Properties Company
    Inventors: James F. Brennan, Patrick C. Chou, Harry L.T. Lee, Rajeev J. Ram, Hermann A. Haus, Erich P. Ippen