Patents by Inventor Eric Rodrigue Numkam Fokoua

Eric Rodrigue Numkam Fokoua 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).

  • Hollow-core photonic bandgap fibers and methods of manufacturing the same
    Patent number: 11034607
    Abstract: A method of fabricating a hollow-core photonic-bandgap fiber, comprising the steps of: providing a stack of capillaries, wherein the stack has a hollow core and the capillaries at a boundary of the core comprise a plurality of first, corner core capillaries and a plurality of second, intermediate core capillaries; applying a pressure differential between the corner core capillaries and the intermediate core capillaries, whereby a size of the corner core capillaries can be controlled in relation to the intermediate core capillaries; and reducing the stack to a fiber, wherein the fiber has a hollow core and a cladding which surrounds the core at a core boundary and comprises a lattice or network of struts and interstitial nodes which together define an array of cavities.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: June 15, 2021
    Assignee: University of Southampton
    Inventors: Eric Rodrigue Numkam Fokoua, Francesco Poletti, David John Richardson, Yong Chen, Natalie Violet Wheeler, John Richard Hayes, Marco Petrovich
  • Hollow-core photonic bandgap fibers and methods of manufacturing the same
    Patent number: 9904008
    Abstract: A hollow-core photonic bandgap fiber having a hollow core and a cladding which surrounds the core at a core boundary and comprises a lattice or network of struts and interstitial nodes which together define an array of cavities, wherein a ratio between a difference in a length of a longest and shortest pitch spacing of the nodes at the core boundary to an average pitch spacing at the core boundary is less than about 0.3.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: February 27, 2018
    Assignee: University of Southampton
    Inventors: Eric Rodrigue Numkam Fokoua, Francesco Poletti, David John Richardson
  • HOLLOW-CORE PHOTONIC BANDGAP FIBERS AND METHODS OF MANUFACTURING THE SAME
    Publication number: 20160236964
    Abstract: A method of fabricating a hollow-core photonic-bandgap fiber, comprising the steps of: providing a stack of capillaries, wherein the stack has a hollow core and the capillaries at a boundary of the core comprise a plurality of first, corner core capillaries and a plurality of second, intermediate core capillaries; applying a pressure differential between the corner core capillaries and the intermediate core capillaries, whereby a size of the corner core capillaries can be controlled in relation to the intermediate core capillaries; and reducing the stack to a fiber, wherein the fiber has a hollow core and a cladding which surrounds the core at a core boundary and comprises a lattice or network of struts and interstitial nodes which together define an array of cavities.
    Type: Application
    Filed: September 19, 2014
    Publication date: August 18, 2016
    Inventors: Eric Rodrigue Numkam Fokoua, Francesco Poletti, David John Richardson, Yong Chen, Natalie Violet Wheeler, John Richard Hayes, Marco Petrovich
  • HOLLOW-CORE PHOTONIC BANDGAP FIBERS AND METHODS OF MANUFACTURING THE SAME
    Publication number: 20160209586
    Abstract: A hollow-core photonic bandgap fiber having a hollow core and a cladding which surrounds the core at a core boundary and comprises a lattice or network of struts and interstitial nodes which together define an array of cavities, wherein a ratio between a difference in a length of a longest and shortest pitch spacing of the nodes at the core boundary to an average pitch spacing at the core boundary is less than about 0.3.
    Type: Application
    Filed: September 19, 2014
    Publication date: July 21, 2016
    Inventors: Eric Rodrigue Numkam Fokoua, Francesco Poletti, David John Richardson