Patents by Inventor Douglas E. Harshbarger

Douglas E. Harshbarger 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).

  • Laser optimized multimode fiber and method for use with laser and LED sources and system employing same
    Patent number: 6724965
    Abstract: A multimode optical fiber having a first laser bandwidth greater than 220 MHz.km in the 850 nm window, a second laser bandwidth greater than 500 MHz.km in the 1300 nm window, a first OFL bandwidth of at least 160 MHz.km in the 850 nm window, and a second OFL bandwidth of at least 500 MHz.km in the 1300 nm window is disclosed. The multimode fiber is capable of operating in telecommunication systems employing both LED power sources and high power laser sources. Methods of making and testing the multimode optical fiber are also disclosed.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: April 20, 2004
    Assignee: Corning Incorporated
    Inventors: John S. Abbott, III, Douglas E. Harshbarger
  • Laser optimized multimode fiber and method for use with laser and LED sources and system employing same
    Patent number: 6618534
    Abstract: A multimode optical fiber having a first laser bandwidth greater than 220 MHz.km in the 850 nm window, a second laser bandwidth greater than 500 MHz.km in the 1300 nm window, a first OFL bandwidth of at least 160 MHz.km in the 850 nm window, and a second OFL bandwidth of at least 500 MHz.km in the 1300 nm window is disclosed. The multimode fiber is capable of operating in telecommunication systems employing both LED power sources and high power laser sources. Methods of making and testing the multimode optical fiber are also disclosed.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: September 9, 2003
    Assignee: Corning Incorporated
    Inventors: John S. Abbott, III, Douglas E. Harshbarger
  • Laser optimized multimode fiber and method for use with laser and LED sources and system employing same
    Publication number: 20020197038
    Abstract: A multimode optical fiber having a first laser bandwidth greater than 220 MHz.km in the 850 nm window, a second laser bandwidth greater than 500 MHz.km in the 1300 nm window, a first OFL bandwidth of at least 160 MHz.km in the 850 nm window, and a second OFL bandwidth of at least 500 MHz.km in the 1300 nm window is disclosed. The multimode fiber is capable of operating in telecommunication systems employing both LED power sources and high power laser sources. Methods of making and testing the multimode optical fiber are also disclosed.
    Type: Application
    Filed: August 12, 2002
    Publication date: December 26, 2002
    Inventors: John S. Abbott, Douglas E. Harshbarger
  • Laser optimized multimode fiber and method for use with laser and led sources and system employing same
    Publication number: 20020146224
    Abstract: A multimode optical fiber having a first laser bandwidth greater than 220 MHz.km in the 850 nm window, a second laser bandwidth greater than 500 MHz.km in the 1300 nm window, a first OFL bandwidth of at least 160 MHz.km in the 850 nm window, and a second OFL bandwidth of at least 500 MHz.km in the 1300 nm window is disclosed. The multimode fiber is capable of operating in telecommunication systems employing both LED power sources and high power laser sources. Methods of making and testing the multimode optical fiber are also disclosed.
    Type: Application
    Filed: June 3, 2002
    Publication date: October 10, 2002
    Inventors: John S. Abbott, Douglas E. Harshbarger
  • Laser optimized multimode fiber and method for use with laser and LED sources and system employing same
    Patent number: 6438303
    Abstract: A multimode optical fiber having a first laser bandwidth greater than 220 MHz.km in the 850 nm window, a second laser bandwidth greater than 500 MHz.km in the 1300 nm window, a first OFL bandwidth of at least 160 MHz.km in the 850 nm window, and a second OFL bandwidth of at least 500 MHz.km in the 1300 nm window is disclosed. The multimode fiber is capable of operating in telecommunication systems employing both LED power sources and high power laser sources. Methods of making and testing the multimode optical fiber are also disclosed.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: August 20, 2002
    Assignee: Corning Incorporated
    Inventors: John S. Abbott, III, Douglas E. Harshbarger
  • Laser optimized multimode fiber and method for use with laser and LED sources and system employing same
    Patent number: 6434309
    Abstract: A multimode optical fiber having a first laser bandwidth greater than 220 MHz.km in the 850 nm window, a second laser bandwidth greater than 500 MHz.km in the 1300 nm window, a first OFL bandwidth of at least 160 MHz.km in the 850 nm window, and a second OFL bandwidth of at least 500 MHz.km in the 1300 nm window is disclosed. The multimode fiber is capable of operating in telecommunication systems employing both LED power sources and high power laser sources. Methods of making and testing the multimode optical fiber are also disclosed.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: August 13, 2002
    Assignee: Corning Incorporated
    Inventors: John S. Abbott, III, Douglas E. Harshbarger
  • Mode conditioning for multimode fiber systems
    Patent number: 6330382
    Abstract: A single mode waveguide coupling to a multimode fiber of a high-bandwidth local optical network is made by a tapered coupler that expands the spot size of the propagating beam to fill additional modes of the multimode fiber. The tapered coupler has a core surrounded by inner and outer layers of cladding. The core and the inner cladding layer are drawn down along their length to force light from the core into the surrounding inner cladding layer. The outer cladding layer confines the expanded beam within the core and inner cladding layer.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: December 11, 2001
    Assignee: Corning Incorporated
    Inventors: Douglas E. Harshbarger, Daniel A. Nolan, Leo C. Thomas, Carlton M. Truesdale