Patents by Inventor Zhanhua Guo

Zhanhua Guo 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).

  • Compact optical multiplexer/demultiplexer
    Patent number: 6941072
    Abstract: The invention relates to wavelength division multiplexing (WDM) and demultiplexing of optical signals using optical filters in free space. To minimize dispersion, the present invention uses relatively small angles of incidence. To avoid the need for a large package, the present invention utilizes reflective prisms to steer the reflected beams to provide a lateral shift in the beam path that ensures that the necessary space is provided between the input/output ports. Devices including a single adjustable filter are disclosed, along with devices having a plurality of filters.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: September 6, 2005
    Assignee: JDS Uniphase Corporation
    Inventors: Li Wu, Zhanhua Guo, Jiwu Ling, Heping Zeng, Zhizhan Ruan, Jiayong Ma
  • Compact optical multiplexer/demultiplexer
    Publication number: 20020057868
    Abstract: The invention relates to wavelength division multiplexing (WDM) and demultiplexing of optical signals using optical filters in free space. To minimize dispersion, the present invention uses relatively small angles of incidence. To avoid the need for a large package, the present invention utilizes reflective prisms to steer the reflected beams to provide a lateral shift in the beam path that ensures that the necessary space is provided between the input/output ports. Devices including a single adjustable filter are disclosed, along with devices having a plurality of filters.
    Type: Application
    Filed: October 16, 2001
    Publication date: May 16, 2002
    Applicant: JDS Uniphase Corporation
    Inventors: Li Wu, Zhanhua Guo, Jiwu Ling, Heping Zeng, Zhizhan Ruan, Jiayong Ma