Patents by Inventor Franz H. Mok

Franz H. Mok 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).

  • Optical amplifier gain control monitoring
    Patent number: 6646790
    Abstract: In a method and apparatus for tracking dynamic characteristics of an optical amplifier, optical signal probes are used to determine the gain and the corner frequency of the optical amplifier. A first optical probe having a predetermined modulation frequency above an expected corner frequency of the amplifier is used to estimate the gain of the optical amplifier. A second optical probe signal having a second predetermined modulation frequency at or below the expected corner frequency of the amplifier is used to estimate the corner frequency. These parameters can be used to optimize gain control of an optical amplifier.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: November 11, 2003
    Assignee: Nortel Networks Limited
    Inventors: Simon P. Parry, Eric S. Maniloff, Gary Mak, Andy Rowland, Franz H. Mok