Patents by Inventor Jeffrey Alan Weslowski

Jeffrey Alan Weslowski 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).

  • Fast loss of signal (LOS) detection for bidirectional optical amplifiers
    Patent number: 6222668
    Abstract: A fast means of detecting that a fiber has been disconnected at one end of a bidirectional optical amplifier by monitoring for several signature effects simultaneously. Upon detection of a loss of signal, the pump laser in the corresponding direction is shut off quickly to prevent oscillation from occurring should the other end of the amplifier be subsequently disconnected.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: April 24, 2001
    Assignee: Nortel Networks Limited
    Inventors: Mathieu Dutrisac, Richard Achile Habel, Robert Keys, Franz Li Hsien Mok, Jeffrey Alan Weslowski
  • Self-stimulation signal detection in an optical transmission system
    Patent number: 5859716
    Abstract: In an apparatus and method for troubleshooting a transmission system comprising optical line amplifiers (OA), optical reflections can be detected irrespective if a data signal is present or absent. Each OA is equipped with a self-stimulation signal detection unit for generating a low frequency local code unique to the transmission system and dithering the outgoing signal in a controlled manner with the local code. Each OA attempts to detect its local code in the incoming signal by comparing the energy of the transmitted and received dithers. The presence of the local code in the incoming signal initiates alarms which unequivocally identify the faulted OA. Each OA selects its local code out of a bank of local codes, according to a priority scheme and re-selects its local code in case of conflicts.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: January 12, 1999
    Assignee: Northern Telecom Limited
    Inventors: Maurice Stephen O'Sullivan, Kim Byron Roberts, James St.Leger Harley, Jeffrey Alan Weslowski
  • Self-stimulation signal detection in an optical transmission system
    Patent number: 5822094
    Abstract: In an apparatus and method for troubleshooting a transmission system comprising optical line amplifiers (OA), optical reflections can be detected irrespective if a data signal is present or absent. Each OA is equipped with a self-stimulation signal detection unit for generating a low frequency local code unique to the transmission system and dithering the outgoing signal in a controlled manner with the local code. Each OA attempts to detect its local code in the incoming signal by comparing the energy of the transmitted and received dithers. The presence of the local code in the incoming signal initiates alarms which unequivocally identify the faulted OA. Each OA selects its local code out of a bank of local codes, according to a priority scheme and re-selects its local code in case of conflicts.
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: October 13, 1998
    Assignee: Northern Telecom Limited
    Inventors: Maurice Stephen O'Sullivan, Kim Bryon Roberts, James St. Leger Harley, Jeffrey Alan Weslowski