Patents by Inventor Zhaowen Xu

Zhaowen Xu 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).

  • Remote node for wavelength-division-multiplexed passive optical network
    Patent number: 8639119
    Abstract: A remote node for a wavelength-division-multiplexed passive optical network (WDM PON). The remote node comprises means for receiving uplink optical signals from one or more optical network units of the WDM PON; a broadband reflector for reflecting a self-seeding portion of the respective uplink optical signals to the respective uplink light sources; and wherein the reflector comprises a gain medium and is configured for receiving a pump optical signal from a central office of the WDM PON for amplifying the self seeding portion of the respective uplink optical signal.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: January 28, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Yang Jing Wen, Zhaowen Xu, Xiaofei Cheng, Yixin Wang
  • REMOTE NODE FOR WAVELENGTH-DIVISION-MULTIPLEXED PASSIVE OPTICAL NETWORK
    Publication number: 20110222857
    Abstract: A remote node for a wavelength-division-multiplexed passive optical network (WDM PON). The remote node comprises means for receiving uplink optical signals from one or more optical network units of the WDM PON; a broadband reflector for reflecting a self-seeding portion of the respective uplink optical signals to the respective uplink light sources; and wherein the reflector comprises a gain medium and is configured for receiving a pump optical signal from a central office of the WDM PON for amplifying the self seeding portion of the respective uplink optical signal.
    Type: Application
    Filed: March 31, 2009
    Publication date: September 15, 2011
    Inventors: Yang Jing Wen, Zhaowen Xu, Xiaofei Cheng, Yixin Wang
  • WDM-PON ARCHITECTURE BASED ON EXTERNALLY SEEDED OPTICAL SOURCE
    Publication number: 20110188859
    Abstract: A wavelength-division-multiplexed passive optical network (WDM PON) comprising: a remote node (RN) comprising a light source for generating a seeding signal; and one or more optical network units (ONUs), each ONU comprising a laser source configured for receiving a portion of the seeding light signal from the RN.
    Type: Application
    Filed: March 31, 2009
    Publication date: August 4, 2011
    Applicant: Agency for Science, Technology and Research
    Inventors: Yang Jing Wen, Zhaowen Xu, Xiaofei Cheng, Yixin Wang