Patents by Inventor Xin Cai

Xin Cai 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).

  • Dynamic power equalization of many wavelength-division-multiplexed channels in a fiber-optic system
    Patent number: 6341021
    Abstract: A dynamic power equalization module (10) for an optical network is provided. It includes a module input (16) for receiving an optical transmission (14) containing a combination of different channels (C1-Cn). Each channel (C1-Cn) has a different characteristic wavelength (&lgr;1-&lgr;n) and different varying power. A power equalization device that is polarization insensitive is connected between the module input (16) and a module output (20). The power equalization device is driven by RF acoustic signals (26). A feedback loop (22) receives at least a portion of output from the module output (20) and generates, based upon a comparison of relative powers of the different channels (C1-Cn), the RF acoustic signals (26) which drive the power equalization device. The power equalization device is driven such that it dynamically controls transmission of the different channels (C1-Cn) to substantially equalize power differentials therebetween.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: January 22, 2002
    Assignee: Case Western Reserve University
    Inventors: Alan E. Wilner, David A. Smith, Jin-Xin Cai, Kai-Ming Feng, Xingyu Zou, Shouhua Huang