Patents by Inventor Fengguang LOU

Fengguang LOU 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).

  • Photodarkening-resistant ytterbium-doped quartz optical fiber and preparation method therefor
    Patent number: 11780768
    Abstract: A photodarkening-resistant ytterbium-doped quartz optical fiber and a method for prpearing such a fiber are provided. Glass of a photodarkening-resistant ytterbium-doped quartz optical fiber core rod includes at least Yb2O3, Al2O3, P2O5, SiO2. The proportions of Yb2O3, Al2O3, and P2O5 in the entire substance are Yb2O3: 0.05-0.3 mol %, Al2O3: 1-3 mol %, and P2O5: 1-5 mol %, respectively. In the preparation method for the photodarkening-resistant ytterbium-doped quartz optical fiber, a sol-gel method and an improved chemical vapor deposition method are combined. By using the molecular-level doping uniformity and the low preparation loss thereof respectively, ytterbium ions, aluminum ions and phosphorus ions are effectively doped in a quartz matrix, thereby effectively solving the problems in the optical fiber of high loss, photodarkening caused by cluster or the like, and a central refractive index dip.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: October 10, 2023
    Assignee: SHANGHAI INSTITUTE OF OPTICS AND FINE MECHANICS, CHINESE ACADEMY OF SCIENCES
    Inventors: Lili Hu, Fengguang Lou, Chunlei Yu, Meng Wang, Lei Zhang, Xiaoqing Xu, Danping Chen, Fan Wang, Mengting Guo
  • PHOTODARKENING-RESISTANT YTTERBIUM-DOPED QUARTZ OPTICAL FIBER AND PREPARATION METHOD THEREFOR
    Publication number: 20210230051
    Abstract: A photodarkening-resistant ytterbium-doped quartz optical fiber and a method for preparing such a fiber are provided. Glass of a photodarkening-resistant ytterbium-doped quartz optical fiber core rod includes at least Yb2O3, Al2O3, P2O5, SiO2. The proportions of Yb2O3, Al2O3, and P2O5 in the entire substance are Yb2O3: 0.05-0.3 mol %, Al2O3: 1-3 mol %, and P2O5: 1-5 mol %, respectively. In the preparation method for the photodarkening-resistant ytterbium-doped quartz optical fiber, a sol-gel method and an improved chemical vapor deposition method are combined. By using the molecular-level doping uniformity and the low preparation loss thereof respectively, ytterbium ions, aluminum ions and phosphorus ions are effectively doped in a quartz matrix, thereby effectively solving the problems in the optical fiber of high loss, photodarkening caused by cluster or the like, and a central refractive index dip.
    Type: Application
    Filed: June 6, 2019
    Publication date: July 29, 2021
    Inventors: Fengguang LOU, Lili HU, Chunlei YU, Meng WANG, Lei ZHANG, Xiaoqing XU, Danping CHEN