Patents by Inventor Kavita Vemuri

Kavita Vemuri 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).

  • System and method for generating an optical vector vortex beam having two lobes
    Patent number: 8437588
    Abstract: Optical vector vortex beams may be generated from few-mode or multi-mode optical fiber by introducing linearly or circularly polarized light into the fiber. By adjusting at least one of the polarization of the light, the incident angle of the light coupled into the fiber, and the length of the fiber, one or more vector modes supported by the fiber may be selected. The resulting output from the fiber may be a vortex beam that can be collimated and used for precise manipulation of objects on order of a micrometer or a nanometer in diameter.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: May 7, 2013
    Assignee: University of Hyderabad
    Inventors: Nirmal Kumar Viswanathan, Kavita Vemuri
  • System and Method for Generating an Optical Vector Vortex Beam
    Publication number: 20110243498
    Abstract: Optical vector vortex beams may be generated from few-mode or multi-mode optical fiber by introducing linearly or circularly polarized light into the fiber. By adjusting at least one of the polarization of the light, the incident angle of the light coupled into the fiber, and the length of the fiber, one or more vector modes supported by the fiber may be selected. The resulting output from the fiber may be a vortex beam that can be collimated and used for precise manipulation of objects on order of a micrometer or a nanometer in diameter.
    Type: Application
    Filed: April 6, 2010
    Publication date: October 6, 2011
    Inventors: Nirmal Kumar Viswanathan, Kavita Vemuri
  • Apparatus and method for adjusting the spectral response of an optical waveguide grating
    Patent number: 6990274
    Abstract: Apparatuses and methods for adjusting the spectral response of an optical waveguide grating include a longitudinal optical waveguide grating attached to a support member having a centroidal axis. The support member is configured for longitudinal bending and rotating about its centroidal axis. The spectral response of the optical waveguide grating is adjusted by bending and rotating the support member about its centroidal axis.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: January 24, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: James R. Bylander, Kavita Vemuri
  • Apparatus and method for adjusting the spectral response of an optical waveguide grating
    Publication number: 20050002610
    Abstract: Apparatuses and methods for adjusting the spectral response of an optical waveguide grating include a longitudinal optical waveguide grating attached to a support member having a centroidal axis. The support member is configured for longitudinal bending and rotating about its centroidal axis. The spectral response of the optical waveguide grating is adjusted by bending and rotating the support member about its centroidal axis.
    Type: Application
    Filed: July 1, 2003
    Publication date: January 6, 2005
    Inventors: James Bylander, Kavita Vemuri
  • Apparatus and method for adjusting the spectral response of an optical waveguide grating
    Patent number: 6788851
    Abstract: An apparatus and method for adjusting the spectral response of a selected channel within an optical waveguide grating includes a grating attached to a support member. An adjusting mechanism applies two bending moments to the grating support member on both sides of the selected channel. The spectral response of the selected channel is adjusted by altering the bending moments.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: September 7, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: James R. Bylander, Kavita Vemuri, Robert W. Wilson, Johnny P. Bryant