Patents by Inventor William John Wadsworth

William John Wadsworth 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).

  • Preform holey optical fibre, a holey optical fibre, and a method for their production
    Patent number: 7116875
    Abstract: A holey optical fibre for supporting propagation of light of a wavelength ?,comprises a plurality of cylinders (10) each having a longitudinal axis, the cylinders (10) being separated from each other by regions of a matrix material (20) and having their longitudinal axes substantially parallel to each other. Each cylinder (10) has a diameter, in the plane perpendicular to the longitudinal axis, that is small enough for the composite material of the ensemble of cylinders and matrix material to be substantially optically homogenous in respect of light of wavelength ?.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: October 3, 2006
    Assignee: Crystal Fibre A/S
    Inventors: William John Wadsworth, Brian Joseph Mangan, Timothy Adam Birks, Jonathan Cave Knight, Philip St. John Russell
  • Preform Holey optical fibre, a holey optical fibre, and a method for their production
    Publication number: 20040151450
    Abstract: A holey optical fibre for supporting propagation of light of a wavelength &lgr;,comprises a plurality of cylinders (10) each having a longitudinal axis, the cylinders (10) being separated from each other by regions of a matrix material (20) and having their longitudinal axes substantially parallel to each other. Each cylinder (10) has a diameter, in the plane perpendicular to the longitudinal axis, that is small enough for the composite material of the ensemble of cylinders and matrix material to be substantially optically homogenous in respect of light of wavelength &lgr;.
    Type: Application
    Filed: March 29, 2004
    Publication date: August 5, 2004
    Inventors: William John Wadsworth, Brian Joseph Mangan, Timothy Adam Birks, Jonathan Cave Knight, Philip St John Russell
  • Nonlinear optical device
    Publication number: 20040028356
    Abstract: A nonlinear optical device, comprises a source of input light having a first spectrum and an optical fibre 10 arranged so that in use the light propagates through the fibre 10, the optical fibre 10 comprises a tapered region including a waist 30, the waist 30 having a diameter smaller than 10 microns for a length of more than 20 mm, wherein the propagating light is converted by nonlinear optical processes into output light having a spectrum different from the first spectrum.
    Type: Application
    Filed: June 13, 2003
    Publication date: February 12, 2004
    Inventors: Timothy Birks, William John Wadsworth, Philip St. John Russell
  • Optical material and a method for its production
    Publication number: 20020181911
    Abstract: A composite material for supporting propagation of light of a wavelength &lgr;, comprising a plurality of cylinders each having a longitudinal axis, the cylinders being separated from each other by regions of a matrix material and the cylinders having their longitudinal axes substantially parallel to each other, and each cylinder having a diameter, in the plane perpendicular to the longitudinal axis, that is small enough for the composite material to be substantially optically homogeneous in respect of light of wavelength &lgr;.
    Type: Application
    Filed: April 30, 2001
    Publication date: December 5, 2002
    Inventors: William John Wadsworth, Brian Joseph Mangan, Timothy Birks, Jonathan Cave Knight, Philip St. John Russell