Patents by Inventor Gansheng Li

Gansheng Li 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).

  • Barium strontium titanate photorefractive device and method for making the same
    Patent number: 5287213
    Abstract: The invention relates to a photorefractive device made of single crystal of which the chemical composition substantially is Ba.sub.1-x Sr.sub.x TiO.sub.3 (0.01<x<0.1 BST) The method for manufacturing said device comprises: growing BST single crystal by Czochralski technique; annealing said crystal in oxidizing atmosphere; machining said crystal into cuboid with polished surfaces; poling said cuboid mechanically and electrically into single-domain state. Said device may ba a piece of said single-domain crystal, or an optoelectronic assembly including at least one of said crystal as the core part. Performances of said device are similar to the one made of BaTiO.sub.3. A reflectivity as high as 52% has been reached using said device as a self-pumped phase conjugator. Compared to BaTiO.sub.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: February 15, 1994
    Assignee: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
    Inventors: Jian Zhuang, Gansheng Li, Xiancheng Gao, Xibin Guo, Yihao Huang, Zhenzhu Shi, Yaying Weng, Jian Lu