Patents by Inventor Timothy W. T. Qian

Timothy W. T. Qian 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).

  • Control architecture and method for optical amplifiers
    Patent number: 6690506
    Abstract: According to an illustrative embodiment of the present invention, a method for controlling an optical amplifier is disclosed. The illustrative method includes receiving a portion of an input signal to the optical amplifier; receiving a portion of an output signal from a first amplification stage; receiving a portion of an output signal of the optical amplifier; and adjusting the first amplification stage and a second amplification stage based on the received portions to substantially control the optical amplifier. According to another illustrative embodiment of the present invention, an optical amplifier includes a controller which receives a portion of an output signal from a first amplification stage and a portion of an output signal from the optical amplifier. The controller adjusts the first amplification stage and a second amplification stage based on the received portions of the signals.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: February 10, 2004
    Assignee: Corning Incorporated
    Inventors: Timothy Zahnley, Aravanan Gurusami, Timothy W. T. Qian, Muhidin Lelic
  • Control architecture and method for optical amplifiers
    Publication number: 20020176156
    Abstract: According to an illustrative embodiment of the present invention, a method for controlling an optical amplifier is disclosed. The illustrative method includes receiving a portion of an input signal to the optical amplifier; receiving a portion of an output signal from a first amplification stage; receiving a portion of an output signal of the optical amplifier; and adjusting the first amplification stage and a second amplification stage based on the received portions to substantially control the optical amplifier.
    Type: Application
    Filed: August 31, 2001
    Publication date: November 28, 2002
    Inventors: Timothy Zahnley, Aravanan Gurusami, Timothy W.T. Qian, Muhidin Lelic