Patents by Inventor Vincent A. O'Byrne

Vincent A. O'Byrne 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).

  • Four level FSK optical signal transmission with optical decoding and coherent detection
    Patent number: 5099351
    Abstract: Apparatus for optical transmission of first and second digital channels. Each digital channel has first and second signal levels. The apparatus has a tunable laser for emitting an optical output at optical frequencies corresponding to current levels. An input which provides a current responsive to the signal levels of the two channels provides current levels to cause the laser to emit a first optical frequency when the first channel has a first signal level and the second channel has a second signal level, a second optical frequency when the first channel has a first signal level and the second channel has a first signal level, a third optical frequency when the first channel has a second signal level and the second channel has a first signal level, and a fourth optical frequency when the first channel has a second signal level and the second channel has a second signal level. An optical transmission medium is coupled to the output of the laser. A local oscillator provides a LO frequency.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: March 24, 1992
    Assignee: GTE Laboratories Incorporated
    Inventor: Vincent A. O'Byrne