Patents by Inventor Kwei Kwang Chang

Kwei Kwang Chang 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).

  • Thermally compensated wavelength division demultiplexer and multiplexer and method of fabrication thereof
    Patent number: 6545826
    Abstract: Thermally compensated wavelength division demultiplexers and multiplexers are disclosed. In one aspect, thermally compensated optical systems for use in an optical network are disclosed. The systems include a diffraction grating coupled to a grating mount having a temperature coefficient. The systems further include an optical fiber coupled to a fiber mount having a temperature coefficient and a lens assembly coupled to a lens mount. The lens mount is operable to position the lens assembly between the fiber mount and the grating mount and includes a substantially similar temperature coefficient to the fiber mount.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: April 8, 2003
    Assignee: Finisar Corporation
    Inventors: James W. Horwitz, Jie Qiao, Feng Zhao, Kwei Kwang Chang