Patents by Inventor Yuanfei ZHANG

Yuanfei ZHANG 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).

  • Width-tunable single-frequency fiber laser light source for coherent optical orthogonal frequency division multiplexing system
    Patent number: 10003167
    Abstract: A width-tunable single-frequency fiber laser light source for coherent optical orthogonal frequency division multiplexing system including a chirped fiber grating with high reflectivity, a high gain optical fiber, a chirped fiber grating with low reflectivity, a single-mode semiconductor pump laser, an optical wavelength division multiplexer, an optical coupler, an optical circulator, and a tunable optical filter module is provided. The chirped fiber grating with low reflectivity and the chirped fiber grating with high reflectivity together serve as a front cavity mirror and a back cavity mirror of a resonant cavity to realize laser oscillation. After a laser with broad spectrum output from the optical wavelength division multiplexer is split by the optical coupler, a part of the laser passes through the optical circulator to enter the tunable optical filter module.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: June 19, 2018
    Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
    Inventors: Shanhui Xu, Zhongmin Yang, Yuanfei Zhang, Zhouming Feng, Changsheng Yang
  • WIDTH-TUNABLE SINGLE-FREQUENCY FIBER LASER LIGHT SOURCE FOR COHERENT OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM
    Publication number: 20180097332
    Abstract: A width-tunable single-frequency fiber laser light source for coherent optical orthogonal frequency division multiplexing system including a chirped fiber grating with high reflectivity, a high gain optical fiber, a chirped fiber grating with low reflectivity, a single-mode semiconductor pump laser, an optical wavelength division multiplexer, an optical coupler, an optical circulator, and a tunable optical filter module is provided. The chirped fiber grating with low reflectivity and the chirped fiber grating with high reflectivity together serve as a front cavity mirror and a back cavity mirror of a resonant cavity to realize laser oscillation. After a laser with broad spectrum output from the optical wavelength division multiplexer is split by the optical coupler, a part of the laser passes through the optical circulator to enter the tunable optical filter module.
    Type: Application
    Filed: December 31, 2015
    Publication date: April 5, 2018
    Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
    Inventors: Shanhui XU, Zhongmin YANG, Yuanfei ZHANG, Zhouming FENG, Changsheng YANG