Patents Assigned to Optical Communications Corp.
  • Optical communications transmitter and receiver
    Patent number: 5025459
    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: July 24, 1989
    Date of Patent: June 18, 1991
    Assignee: Optical Communications Corp.
    Inventor: Thomas M. Lill
  • Optical communications transmitter and receiver
    Patent number: 4852128
    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: July 23, 1986
    Date of Patent: July 25, 1989
    Assignee: Optical Communications Corp.
    Inventor: Thomas M. Lill
  • Fiber optic data transmitting system
    Patent number: 4831662
    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: November 25, 1987
    Date of Patent: May 16, 1989
    Assignee: Optical Communications Corp.
    Inventor: Loughrey R. Kuhn
  • Fiber optic digital data transmitting system
    Patent number: RE34676
    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: September 3, 1993
    Date of Patent: July 26, 1994
    Assignee: Optical Communications Corp.
    Inventor: Loughrey R. Kuhn