Patents by Inventor Pei-fang Hu

Pei-fang Hu 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).

  • Method of enhancing the photosensitivity of a material
    Publication number: 20040067018
    Abstract: A material such as an optical fibre is subjected to hydrogen loading. Substantially all the unreacted hydrogen is then allowed to diffuse out of the material. This procedure enhances the photosensitivity of the material, and the hydrogen loading is performed at a temperature and duration which avoids formation of hydroxyl species in the material (eg, 80 degrees Celsius for 14 days for a phosphosilicate fibre). An optical structure such as a Bragg grating (14) may subsequently be written in the material, via UV irradiation.
    Type: Application
    Filed: August 20, 2003
    Publication date: April 8, 2004
    Inventors: John Canning, Pei-fang Hu