Patents by Inventor Jen-Hung Chu

Jen-Hung Chu 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).

  • Photo-sensitive fiber
    Patent number: 6221555
    Abstract: Abnormal losses outside a reflection band attributable to a mismatch of core field diameters are suppressed. A photo-sensitive fiber comprising a core 1 and a cladding having a cladding inner layer and a cladding outer layer formed in this order around the core, in which at least the core is photo-sensitive to form a grating. The core and cladding inner layer include a photo-sensitive dopant for increasing the refractive index. The core additionally includes a first non-photo-sensitive dopant for increasing the refractive index and the cladding inner layer additionally includes a second non-photo-sensitive dopant for creasing the refractive index.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: April 24, 2001
    Assignees: Showa Electric Wire & Cable Co., Ltd., Prime Optical Fiber Corporation
    Inventors: Yuichi Murakami, Yuichi Morishita, Kenichi Muta, Jen-Hung Chu, Hen-Tai Shang