Patents Assigned to Optical Communications Corporation
  • Optical communications transmitter and receiver
    Patent number: 5394442
    Abstract: An improved digital communications system is disclosed in which synchronization information is transmitted with the data. A start pulse, having a duration different than the other pulses in the transmitted digital data signal is used to mark the beginning of the frame of digital data. Preferably, a midpoint pulse is also transmitted with the start pulse to mark the midpoint of the frame to facilitate the generation of a local clock signal. Bit positions within the transmitted signal are sampled by sampling pulses which are generated by digital timers having time intervals keyed to the start and midpoint pulses.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: February 28, 1995
    Assignee: Optical Communications Corporation
    Inventor: Thomas M. Lill
  • Optical communications transmitter and receiver
    Patent number: 5163072
    Abstract: An improved digital communications system is disclosed in which synchronization information is transmitted with the data. A start pulse, having a duration different than the other pulses in the transmitted digital data signal is used to mark the beginning of the frame of digital data. Preferably, a midpoint pulse is also transmitted with the start pulse to mark the midpoint of the frame to facilitate the generation of a local clock signal. Bit positions within the transmitted signal are sampled by sampling pulses which are generated by digital timers having time intervals keyed to the start and midpoint pulses.
    Type: Grant
    Filed: January 9, 1991
    Date of Patent: November 10, 1992
    Assignee: Optical Communications Corporation
    Inventor: Thomas M. Lill
  • Fiber optic digital data transmitting system
    Patent number: 4561117
    Abstract: A fiber optic digital data transmitting system is disclosed which has the capability of transmitting and accurately reproducing digital data signals at the receiver even when the optical signal is attenuated in the fiber optic transmitting medium. A composite signal is produced at the transmitter which is the time coincident sum of the non-zero amplitude of the digital data signal to be transmitted and a time varying signal which encodes each non-zero amplitude of the digital signal and other information. The composite signal modulates an optical carrier signal which is coupled to a fiber optic transmission medium which couples the transmitter to the receiver. At the receiver, the presence of each time varying signal is detected as a non-zero amplitude of the digital signal.
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: December 24, 1985
    Assignee: Optical Communications Corporation
    Inventor: Loughrey R. Kuhn