Patents by Inventor Frank Vincent DiMarcello

Frank Vincent DiMarcello 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).

  • Multimode optical fibers with increased bandwidth
    Patent number: 7043128
    Abstract: The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: May 9, 2006
    Assignee: Furukawa Electric North America
    Inventors: David John DiGiovanni, Frank Vincent DiMarcello, XinLi Jiang, George E. Oulundsen, Sandeep Prabhakar Pandit
  • Multimode optical fibers with increased bandwidth
    Publication number: 20040228590
    Abstract: The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth.
    Type: Application
    Filed: February 25, 2004
    Publication date: November 18, 2004
    Inventors: David John DiGiovanni, Frank Vincent DiMarcello, XinLi Jiang, George E. Oulundsen, Sandeep Prabhakar Pandit
  • Method of impressing a twist on a multimode fiber during drawing
    Patent number: 6735985
    Abstract: The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: May 18, 2004
    Assignee: Furukawa Electric North America Inc
    Inventors: David John DiGiovanni, Frank Vincent DiMarcello, XinLi Jiang, George E. Oulundsen, Sandeep Prabhakar Pandit
  • Multimode optical fibers wih increased bandwidth
    Publication number: 20030128942
    Abstract: The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth.
    Type: Application
    Filed: December 20, 2001
    Publication date: July 10, 2003
    Inventors: David John DiGiovanni, Frank Vincent DiMarcello, XinLi Jiang, George E. Oulundsen, Sandeep Prabhakar Pandit
  • Method of making optical fiber
    Patent number: 5928574
    Abstract: Fiber bow makes mass fusion splicing of optical fiber difficult and this is undesirable. We have found that fiber bow can be significantly reduced if the fiber that is being drawn from a heated optical fiber preform is caused to run through a tubular cooling chamber that extends from the draw furnace, the cooling chamber comprising a tube of inner diameter d.sub.1 <35 mm, preferably <20 mm. In a preferred embodiment the cooling chamber includes an upper cooling chamber of inner diameter d.sub.2 >d.sub.1, with a transition element providing a smooth transition between the two chambers. The cooling chamber desirably is free of turbulence-causing air leaks and/or geometrical features.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: July 27, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: Frank Vincent DiMarcello, Richard Garner Huff, Karen S. Kranz, Frederick W. Walz, Jr.
  • Magnesia fiber draw furnace
    Patent number: 5698124
    Abstract: A fiber drawing apparatus is provided with an improved fiber draw furnace wherein an inner zirconia tube is surrounded by a radially-spaced annular insulating region of magnesia within a silica beaker. While the magnesia has a melting point approximately the same as zirconia, the electrical conductivity of magnesia is substantially lower, enabling it to withstand higher RF power. Moreover magnesia is more soluble than zirconia in silica, reducing the likelihood of particulate contamination of the fiber.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: December 16, 1997
    Assignee: Lucent Technologies Inc.
    Inventors: Frank Vincent DiMarcello, James William Fleming, Jr., Arthur Clifford Hart, Jr., Richard Garner Huff, Karen S. Kranz
  • Graded index optical fiber
    Patent number: 4076380
    Abstract: A graded index optical fiber with a structure which results in improved pulse dispersion characteristics is disclosed. The refractive index properties of the fiber core may be defined in terms of coaxially nested tubular regions, each of different index of refraction, which together form a radially graded index of refraction. The optical properties of each tubular region vary periodically along the longitudinal direction. The longitudinal variation of each tubular region is in approximate antiphase with the longitudinal variation of the tubular regions immediately adjacent to it. In the disclosed structure each tubular region is composed of at least two intertwined helical ribbons of material.
    Type: Grant
    Filed: October 28, 1976
    Date of Patent: February 28, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Frank Vincent DiMarcello, John Charles Williams