Patents by Inventor David S. Forrester

David S. Forrester 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).

  • Patent number: 5142603
    Abstract: A method of splicing optical fibres is described in which at least one of the fibers has a high numerical aperture (NA) and the two fibres have different mode spot sizes. The method comprises fusing the ends of the fibres together with their cores in alignment and heating the fused junction between the fibres so as to cause dopant to migrate out of the core. The heating step is carried out for a time sufficient to achieve a predetermined level of matching between propagation modes in the two fibres.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: August 25, 1992
    Assignee: British Telecommunications public limited company
    Inventor: David S. Forrester