Patents by Inventor Bart Johnson

Bart Johnson 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 transmitting a signal using thermal chirp management of a directly modulated transmitter
    Publication number: 20050111852
    Abstract: A fiber optic transmitter comprising a digital driver adapted to adjust the crossing point of a digital base signal, an optical source adapted to receive the digital base signal and produce a frequency modulated optical signal, and an optical spectrum reshaper adapted to convert the frequency modulated optical signal to an amplitude modulated optical signal. A method for transmitting a signal, comprising: adjusting the crossing point of a digital base signal; providing the adjusted signal to an optical source to produce a frequency modulated optical signal; and providing the frequency modulated optical signal to an optical spectrum reshaper to convert the frequency modulated optical signal to an amplitude modulated optical signal.
    Type: Application
    Filed: September 2, 2004
    Publication date: May 26, 2005
    Inventors: Daniel Mahgerefteh, Roeland Nuyts, Yasuhiro Matsui, Parviz Tayebati, Bart Johnson, Duncan Walker, Xueyan Zheng