Patents by Inventor Nadakumar Ramanujam

Nadakumar Ramanujam 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).

  • Method and system for dispersion maps and enhanced distributed gain effect in long haul telecommunications using distributed and remotely pumped erbium-based amplification
    Patent number: 6850677
    Abstract: A system and method of providing a transmission span for a telecommunications link based on a remote Er3+-doped fiber amplification scheme is provided, where a transmission span comprises first through third segments each respectively comprising first-third optical fibers having first-third fiber lengths and first-third physical properties. The first and third segments are optically coupled to opposing ends of the second segment. At least one of the first and third physical properties is different from the second physical property, where the first segment provides low nonlinearity, the third segment provides distributed gain, and the second segment compensates for the dispersion of the first and third segments. The span also includes a fourth optical fiber that is doped with a non-zero concentration of Er3+, and is disposed at a location in the span for remote pumping to provide discrete amplification of the optical signal.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: February 1, 2005
    Assignee: Corvis Corporation
    Inventors: Michael L. Dennis, M. Imran Hayee, Cathal Mahon, Bo Pedersen, Nadakumar Ramanujam, William Shieh
  • Method and system for dispersion maps and enhanced distributed gain effect in long haul telecommunications using distributed and remotely pumped erbium-based amplification
    Publication number: 20040109655
    Abstract: A system and method of providing a transmission span for a telecommunications link based on a remote Er3+-doped fiber amplification scheme is provided, where a transmission span comprises first through third segments each respectively comprising first-third optical fibers having first-third fiber lengths and first-third physical properties. The first and third segments are optically coupled to opposing ends of the second segment. At least one of the first and third physical properties is different from the second physical property, where the first segment provides low nonlinearity, the third segment provides distributed gain, and the second segment compensates for the dispersion of the first and third segments. The span also includes a fourth optical fiber that is doped with a non-zero concentration of Er3+, and is disposed at a location in the span for remote pumping to provide discrete amplification of the optical signal.
    Type: Application
    Filed: July 14, 2003
    Publication date: June 10, 2004
    Applicant: Corvis
    Inventors: Michael L. Dennis, M. Imran Hayee, Cathal Mahon, Bo Pedersen, Nadakumar Ramanujam, William Shieh