Patents by Inventor Nirmal Kumar Viswanathan

Nirmal Kumar Viswanathan 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