Patents by Inventor Vernon Baker

Vernon Baker 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).

  • Adjustable dispersion compensators, adjustable optical filters, and control signals and strain applicators therefor
    Publication number: 20020159672
    Abstract: The present specification describes strain applicators, incorporating two actuators having different actuation characteristics acting in cooperation, and their use in adjustable optical filters and adjustable dispersion devices (such as compensators) to controllably strain fiber Bragg gratings to alter their reflectance characteristics. Preferred examples of the strain applicators are hybrids of a fast response actuator with a slower device, and provide a wide overall range of adjustment with fast response tuning within that range.
    Type: Application
    Filed: March 13, 2001
    Publication date: October 31, 2002
    Inventors: Julian A. Fells, Daniel A. Watley, Vernon Baker
  • Polarization insensitive wavelength multiplexing 2.times.2 fibre couplers
    Patent number: 5408555
    Abstract: In the manufacture of a wavelength multiplexing 2.times.2 tapered fused fiber coupler by progressive stretching, the birefringence of the coupler resulting from the progressive stretching is subsequently nulled-out by elastic twisting of the coupler. The progressive stretching is performed, under temperature conditions providing a profile in the coupling region of the coupler having the property that the coupling strength for one of the principal polarization planes of the coupler remains substantially constant during said elastic twisting.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: April 18, 1995
    Assignee: Northern Telecom Limited
    Inventors: Alan Fielding, Christopher Chew, Vernon Baker, Sandra Davis
  • Optical coupler utilizing low or zero birefringence optical fibers and a method of making same
    Patent number: 4756589
    Abstract: Polarization beam splitters/combiners or polarization insensitive beam splitters/combiners are manufactured from low or zero birefringence single mode optical fibre, rather than high birefringence fibre, by using a differential pulling technique to induce the appropriate amount of form birefringence, the fibres being stretched further than hitherto.
    Type: Grant
    Filed: January 15, 1986
    Date of Patent: July 12, 1988
    Assignee: STC plc
    Inventors: Terry Bricheno, Vernon Baker