Patents by Inventor Daiping Ma

Daiping Ma 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).

  • Positive dispersion low dispersion slope fiber
    Patent number: 6212322
    Abstract: Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: April 3, 2001
    Assignee: Corning Incorporated
    Inventors: Daiping Ma, David Kinney Smith
  • Low attenuation optical waveguide
    Patent number: 6134367
    Abstract: Disclosed is a single mode optical waveguide fiber having a core refractive index profile in which the profile parameters are selected to provide an attenuation minimum. A set of profiles having the same general shape and dimensions is shown to have a group of profiles contained in a sub-set which exhibit a minimum of attenuation as compared to the remaining members of the set. The members of the sub-set have been found to have the lowest effective group index, n.sub.geff, and the lowest change in .beta..sup.2 under waveguide fiber bending.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: October 17, 2000
    Assignee: Corning Incorporated
    Inventors: Peter C. Jones, Daiping Ma, David K. Smith
  • High performance single mode waveguide
    Patent number: 6031956
    Abstract: Disclosed is a single mode optical waveguide fiber having a segmented core design. In particular, the core comprises three segments, each having characteristic dimensions and refractive index profile. By proper choice of index profile in each segment, a waveguide fiber is made which has a mode field diameter of about 9.5, low, positive total dispersion over the operating window 1530 nm to 1565 nm as well as effective area greater than 60 .mu.m.sup.2.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: February 29, 2000
    Assignee: Corning Incorporated
    Inventors: Ming-Jun Li, Yanming Liu, Daiping Ma, David K. Smith