Patents by Inventor Limin Tong

Limin Tong 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).

  • Subwavelength-diameter silica wires for low-loss optical waveguiding
    Patent number: 7620281
    Abstract: The present invention provides nanometer-sized diameter silica fibers that exhibit high diameter uniformity and surface smoothness. The silica fibers can have diameters in a range of a about 20 nm to about 1000 nm. An exemplary method according to one embodiment of the invention for generating such fibers utilizes a two-step process in which in an initial step a micrometer sized diameter silica preform fiber is generated, and in a second step, the silica preform is drawn while coupled to a support element to form a nanometer sized diameter silica fiber. The portion of the support element to which the preform is coupled is maintained at a temperature suitable for drawing the nansized fiber, and is preferably controlled to exhibit a temporally stable temperature profile.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: November 17, 2009
    Assignee: President & Fellows of Harvard College
    Inventors: Eric Mazur, Limin Tong, Rafael Gattass
  • SUBWAVELENGTH-DIAMETER SILICA WIRES FOR LOW-LOSS OPTICAL WAVEGUIDING
    Publication number: 20090003783
    Abstract: The present invention provides nanometer-sized diameter silica fibers that exhibit high diameter uniformity and surface smoothness. The silica fibers can have diameters in a range of a about 20 nm to about 1000 nm. An exemplary method according to one embodiment of the invention for generating such fibers utilizes a two-step process in which in an initial step a micrometer sized diameter silica preform fiber is generated, and in a second step, the silica preform is drawn while coupled to a support element to form a nanometer sized diameter silica fiber. The portion of the support element to which the preform is coupled is maintained at a temperature suitable for drawing the nansized fiber, and is preferably controlled to exhibit a temporally stable temperature profile.
    Type: Application
    Filed: July 8, 2008
    Publication date: January 1, 2009
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Eric Mazur, Limin Tong, Rafael Gattass
  • Subwavelength-diameter silica wires for low-loss optical waveguiding
    Patent number: 7421173
    Abstract: The present invention provides nanometer-sized diameter silica fibers that exhibit high diameter uniformity and surface smoothness. The silica fibers can have diameters in a range of a about 20 nm to about 1000 nm. An exemplary method according to one embodiment of the invention for generating such fibers utilizes a two-step process in which in an initial step a micrometer sized diameter silica preform fiber is generated, and in a second step, the silica preform is drawn while coupled to a support element to form a nanometer sized diameter silica fiber. The portion of the support element to which the preform is coupled is maintained at a temperature suitable for drawing the nansized fiber, and is preferably controlled to exhibit a temporally stable temperature profile.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: September 2, 2008
    Assignee: President and Fellows of Harvard College
    Inventors: Eric Mazur, Limin Tong, Rafael Gattass
  • Subwavelength-diameter silica wires for low-loss optical waveguiding
    Publication number: 20050207713
    Abstract: The present invention provides nanometer-sized diameter silica fibers that exhibit high diameter uniformity and surface smoothness. The silica fibers can have diameters in a range of a about 20 nm to about 1000 nm. An exemplary method according to one embodiment of the invention for generating such fibers utilizes a two-step process in which in an initial step a micrometer sized diameter silica preform fiber is generated, and in a second step, the silica preform is drawn while coupled to a support element to form a nanometer sized diameter silica fiber. The portion of the support element to which the preform is coupled is maintained at a temperature suitable for drawing the nansized fiber, and is preferably controlled to exhibit a temporally stable temperature profile.
    Type: Application
    Filed: December 15, 2004
    Publication date: September 22, 2005
    Inventors: Eric Mazur, Limin Tong, Rafael Gattass