Patents by Inventor Xiofan Cao

Xiofan Cao 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 node including three-stage optical amplifier with automatic gain and level control
    Patent number: 6621625
    Abstract: An optical node and method for operation in an ultra long haul backbone network that provides DWDM optical transmission and wavelength networking functionalities are disclosed. The optical node is designed with capabilities for amplification, dispersion compensation, and add/drop functionalities. In one embodiment, three erbium-doped fiber amplifier (EDFA) are cascaded using low nonlinearity and low loss dispersion compensating module (DCM).
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: September 16, 2003
    Assignee: Avanex Corporation
    Inventors: Lintao Zhang, Guohua Xiao, Charles Mao, Xiofan Cao, Jialing Yang, Jin Xie, Gang Li