Patents Represented by Attorney Law Firm of Peter V. D. Wilde

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  • Accelerated aging of phosphorus-doped optical fibers
    Patent number: 8111961
    Abstract: Adverse hydrogen aging limitations in multiply-doped optical fibers are overcome by passivating these optical fibers using a deuterium passivation process. This treatment essentially pre-reacts the glass with deuterium so that the most active glass sites are no longer available to react with hydrogen in service. Optical fibers of main interest are doped with mixtures of germanium and phosphorus. Optimum passivating process conditions are described.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: February 7, 2012
    Assignee: OFS Fitel, LLC
    Inventors: David J. DiGiovanni, Michael LuValle, George E. Oulundsen, Durgesh Shivram Vaidya, Robert Lingle, Jr.
  • Measuring modal content of multi-moded fibers
    Patent number: 8111386
    Abstract: The output modal content of optical fibers that contain more than one spatial mode may be analyzed and quantified by measuring interference between co-propagating modes in the optical fiber. By spatially resolving the interference, an image of the spatial beat pattern between two modes may be constructed, thereby providing information about the modes supported by the optical fiber. Measurements of the phase front exiting the optical fiber under test are advantageously performed in the far field.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: February 7, 2012
    Assignee: OFS Fitel, LLC
    Inventors: Jeffrey W. Nicholson, Andrew D. Yablon