Patents by Inventor Lutfur Rahman

Lutfur Rahman 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).

  • Fault recovery in branched optical networks
    Patent number: 9276694
    Abstract: A system and method for fault recovery in a branched optical network. In response to a fault, power distribution in channels on recovering digital line segments is adjusted to minimize a merit function based on one or more system parameters.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 1, 2016
    Assignee: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongsheng Wang, Dmitriy Kovsh, Lutfur Rahman, Ruomei Mu
  • FAULT RECOVERY IN BRANCHED OPTICAL NETWORKS
    Publication number: 20140099098
    Abstract: A system and method for fault recovery in a branched optical network. In response to a fault, power distribution in channels on recovering digital line segments is adjusted to minimize a merit function based on one or more system parameters.
    Type: Application
    Filed: March 15, 2013
    Publication date: April 10, 2014
    Inventors: Hongsheng Wang, Dmitriy Kovsh, Lutfur Rahman, Ruomei Mu
  • Controlled dispersion optical fiber
    Patent number: 6760525
    Abstract: Disclosed is a dispersion controlled optical waveguide fiber, and telecommunication systems using such a waveguide fiber, in which the end to end total dispersion and total dispersion slope is controlled by varying the refractive index profile along the fiber length. The waveguide fiber includes length portions each of which is characterized by total dispersion having a magnitude and sign and total dispersion slope having a magnitude and sign. The magnitudes and signs of total dispersion and total dispersion slope of respective length portions are chosen to provide for the optical waveguide fiber a desired end to end total dispersion and total dispersion slope. An advantage is achieved in the present invention by designing the refractive index profiles of the length portions to have total dispersion and total dispersion slope of opposite sign.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: July 6, 2004
    Assignee: Corning Incorporated
    Inventors: George E. Berkey, Venkata A. Bhagavatula, Lutfur Rahman, Vaidyanathan Srikant
  • Controlled dispersion optical fiber
    Publication number: 20030044148
    Abstract: Disclosed is a dispersion controlled optical waveguide fiber, and telecommunication systems using such a waveguide fiber, in which the end to end total dispersion and total dispersion slope is controlled by varying the refractive index profile along the fiber length. The waveguide fiber includes length portions each of which is characterized by total dispersion having a magnitude and sign and total dispersion slope having a magnitude and sign. The magnitudes and signs of total dispersion and total dispersion slope of respective length portions are chosen to provide for the optical waveguide fiber a desired end to end total dispersion and total dispersion slope. An advantage is achieved in the present invention by designing the refractive index profiles of the length portions to have total dispersion and total dispersion slope of opposite sign.
    Type: Application
    Filed: August 19, 2002
    Publication date: March 6, 2003
    Inventors: George E. Berkey, Venkata A. Bhagavatula, Lutfur Rahman, V. Srikant